./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/stack-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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:33:19,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:33:19,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:33:19,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:33:19,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:33:19,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:33:19,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:33:19,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:33:19,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:33:19,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:33:19,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:33:19,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:33:19,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:33:19,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:33:19,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:33:19,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:33:19,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:33:19,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:33:19,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:33:19,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:33:19,111 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:33:19,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:33:19,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:33:19,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:33:19,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:33:19,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:33:19,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:33:19,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:33:19,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:33:19,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:33:19,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:33:19,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:33:19,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:33:19,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:33:19,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:33:19,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:33:19,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:33:19,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:33:19,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:33:19,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:33:19,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:33:19,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:33:19,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:33:19,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:33:19,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:33:19,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:33:19,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:33:19,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:33:19,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:33:19,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:33:19,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:33:19,164 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:33:19,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:33:19,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:33:19,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:33:19,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:33:19,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:33:19,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:33:19,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:33:19,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:33:19,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:33:19,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:33:19,167 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:33:19,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:33:19,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:33:19,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-07-21 08:33:19,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:33:19,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:33:19,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:33:19,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:33:19,431 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:33:19,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2022-07-21 08:33:19,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005c3d45f/142fee9f5af44208997566a0a30bd595/FLAGf90134446 [2022-07-21 08:33:19,935 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:33:19,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2022-07-21 08:33:19,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005c3d45f/142fee9f5af44208997566a0a30bd595/FLAGf90134446 [2022-07-21 08:33:19,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005c3d45f/142fee9f5af44208997566a0a30bd595 [2022-07-21 08:33:19,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:33:19,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:33:19,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:33:19,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:33:19,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:33:19,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:33:19" (1/1) ... [2022-07-21 08:33:19,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3466cbeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:19, skipping insertion in model container [2022-07-21 08:33:19,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:33:19" (1/1) ... [2022-07-21 08:33:19,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:33:20,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:33:20,364 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/stack-1.i[41520,41533] [2022-07-21 08:33:20,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:33:20,406 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:33:20,435 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/stack-1.i[41520,41533] [2022-07-21 08:33:20,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:33:20,494 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:33:20,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20 WrapperNode [2022-07-21 08:33:20,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:33:20,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:33:20,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:33:20,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:33:20,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,530 INFO L137 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2022-07-21 08:33:20,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:33:20,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:33:20,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:33:20,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:33:20,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:33:20,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:33:20,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:33:20,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:33:20,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (1/1) ... [2022-07-21 08:33:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:33:20,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:20,596 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) [2022-07-21 08:33:20,606 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 [2022-07-21 08:33:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-21 08:33:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-21 08:33:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-21 08:33:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-21 08:33:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:33:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:33:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:33:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:33:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:33:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:33:20,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:33:20,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:33:20,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:33:20,641 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:33:20,755 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:33:20,756 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:33:21,003 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:33:21,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:33:21,012 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:33:21,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:33:21 BoogieIcfgContainer [2022-07-21 08:33:21,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:33:21,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:33:21,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:33:21,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:33:21,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:33:19" (1/3) ... [2022-07-21 08:33:21,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f96fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:33:21, skipping insertion in model container [2022-07-21 08:33:21,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:20" (2/3) ... [2022-07-21 08:33:21,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f96fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:33:21, skipping insertion in model container [2022-07-21 08:33:21,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:33:21" (3/3) ... [2022-07-21 08:33:21,019 INFO L111 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-07-21 08:33:21,022 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:33:21,028 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:33:21,029 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:33:21,029 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:33:21,105 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:33:21,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 176 transitions, 368 flow [2022-07-21 08:33:21,210 INFO L129 PetriNetUnfolder]: 10/174 cut-off events. [2022-07-21 08:33:21,211 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:33:21,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 10/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 418 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-07-21 08:33:21,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 176 transitions, 368 flow [2022-07-21 08:33:21,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 337 flow [2022-07-21 08:33:21,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:33:21,238 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@193a95a2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ca8a26c [2022-07-21 08:33:21,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:33:21,270 INFO L129 PetriNetUnfolder]: 5/130 cut-off events. [2022-07-21 08:33:21,270 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:33:21,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:21,271 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:21,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -211887483, now seen corresponding path program 1 times [2022-07-21 08:33:21,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:21,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994337366] [2022-07-21 08:33:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:21,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994337366] [2022-07-21 08:33:21,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994337366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:21,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:21,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:33:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707577411] [2022-07-21 08:33:21,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:33:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:33:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:33:21,585 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-21 08:33:21,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2022-07-21 08:33:21,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:21,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-21 08:33:21,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:21,720 INFO L129 PetriNetUnfolder]: 88/703 cut-off events. [2022-07-21 08:33:21,721 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-21 08:33:21,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 703 events. 88/703 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3110 event pairs, 32 based on Foata normal form. 69/706 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-07-21 08:33:21,729 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 20 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2022-07-21 08:33:21,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 385 flow [2022-07-21 08:33:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:33:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:33:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-07-21 08:33:21,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9299242424242424 [2022-07-21 08:33:21,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-07-21 08:33:21,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-07-21 08:33:21,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:21,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-07-21 08:33:21,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2022-07-21 08:33:21,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:21,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:21,763 INFO L186 Difference]: Start difference. First operand has 161 places, 164 transitions, 337 flow. Second operand 3 states and 491 transitions. [2022-07-21 08:33:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 385 flow [2022-07-21 08:33:21,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 162 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:33:21,770 INFO L242 Difference]: Finished difference. Result has 157 places, 156 transitions, 331 flow [2022-07-21 08:33:21,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=157, PETRI_TRANSITIONS=156} [2022-07-21 08:33:21,775 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, -4 predicate places. [2022-07-21 08:33:21,775 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 156 transitions, 331 flow [2022-07-21 08:33:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2022-07-21 08:33:21,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:21,776 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:33:21,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2060462298, now seen corresponding path program 1 times [2022-07-21 08:33:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:21,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775602766] [2022-07-21 08:33:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775602766] [2022-07-21 08:33:21,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775602766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:21,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:21,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:33:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614412747] [2022-07-21 08:33:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:21,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:33:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:33:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:33:21,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 176 [2022-07-21 08:33:21,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 156 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 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) [2022-07-21 08:33:21,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:21,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 176 [2022-07-21 08:33:21,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:21,967 INFO L129 PetriNetUnfolder]: 34/594 cut-off events. [2022-07-21 08:33:21,968 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:33:21,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 594 events. 34/594 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2037 event pairs, 11 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-07-21 08:33:21,972 INFO L132 encePairwiseOnDemand]: 171/176 looper letters, 16 selfloop transitions, 4 changer transitions 0/164 dead transitions. [2022-07-21 08:33:21,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 164 transitions, 392 flow [2022-07-21 08:33:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:33:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:33:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-07-21 08:33:21,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9161931818181818 [2022-07-21 08:33:21,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-07-21 08:33:21,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-07-21 08:33:21,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:21,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-07-21 08:33:21,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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) [2022-07-21 08:33:21,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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) [2022-07-21 08:33:21,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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) [2022-07-21 08:33:21,979 INFO L186 Difference]: Start difference. First operand has 157 places, 156 transitions, 331 flow. Second operand 4 states and 645 transitions. [2022-07-21 08:33:21,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 164 transitions, 392 flow [2022-07-21 08:33:21,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:33:21,986 INFO L242 Difference]: Finished difference. Result has 161 places, 159 transitions, 356 flow [2022-07-21 08:33:21,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=161, PETRI_TRANSITIONS=159} [2022-07-21 08:33:21,987 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-07-21 08:33:21,987 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 159 transitions, 356 flow [2022-07-21 08:33:21,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 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) [2022-07-21 08:33:21,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:21,988 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:21,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:33:21,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1664854431, now seen corresponding path program 1 times [2022-07-21 08:33:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343088319] [2022-07-21 08:33:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:21,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:22,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343088319] [2022-07-21 08:33:22,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343088319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:22,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:22,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:33:22,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350460418] [2022-07-21 08:33:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:33:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:33:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:33:22,071 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-21 08:33:22,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 159 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-07-21 08:33:22,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:22,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-21 08:33:22,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:22,202 INFO L129 PetriNetUnfolder]: 127/1271 cut-off events. [2022-07-21 08:33:22,203 INFO L130 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-07-21 08:33:22,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1271 events. 127/1271 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6938 event pairs, 33 based on Foata normal form. 12/1209 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-07-21 08:33:22,210 INFO L132 encePairwiseOnDemand]: 170/176 looper letters, 25 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-07-21 08:33:22,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 171 transitions, 447 flow [2022-07-21 08:33:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:33:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:33:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2022-07-21 08:33:22,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9204545454545454 [2022-07-21 08:33:22,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2022-07-21 08:33:22,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2022-07-21 08:33:22,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:22,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2022-07-21 08:33:22,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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) [2022-07-21 08:33:22,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:22,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:22,215 INFO L186 Difference]: Start difference. First operand has 161 places, 159 transitions, 356 flow. Second operand 3 states and 486 transitions. [2022-07-21 08:33:22,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 171 transitions, 447 flow [2022-07-21 08:33:22,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 171 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:33:22,221 INFO L242 Difference]: Finished difference. Result has 164 places, 163 transitions, 396 flow [2022-07-21 08:33:22,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2022-07-21 08:33:22,223 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2022-07-21 08:33:22,223 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 396 flow [2022-07-21 08:33:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-07-21 08:33:22,223 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:22,224 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:33:22,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash 172146190, now seen corresponding path program 1 times [2022-07-21 08:33:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713443566] [2022-07-21 08:33:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:22,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:22,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713443566] [2022-07-21 08:33:22,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713443566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:22,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375203098] [2022-07-21 08:33:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:22,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:22,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:22,356 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) [2022-07-21 08:33:22,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:33:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:33:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:22,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:22,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375203098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:22,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:22,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:33:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857613148] [2022-07-21 08:33:22,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:33:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:33:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:33:22,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-21 08:33:22,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 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) [2022-07-21 08:33:22,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:22,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-21 08:33:22,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:23,029 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][182], [Black: 192#(<= 1 ~top~0), Black: 178#(= ~top~0 0), 33#L946-2true, 190#true, 86#L1009-1true, 31#L1023-4true, 234#(<= ~top~0 0), Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), t2Thread1of1ForFork1InUse]) [2022-07-21 08:33:23,029 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([472] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][183], [116#L1011true, Black: 190#true, Black: 178#(= ~top~0 0), 33#L946-2true, 192#(<= 1 ~top~0), 31#L1023-4true, Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 196#true, t2Thread1of1ForFork1InUse]) [2022-07-21 08:33:23,030 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-21 08:33:23,030 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-21 08:33:23,031 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-21 08:33:23,096 INFO L129 PetriNetUnfolder]: 387/3002 cut-off events. [2022-07-21 08:33:23,097 INFO L130 PetriNetUnfolder]: For 1007/1065 co-relation queries the response was YES. [2022-07-21 08:33:23,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 3002 events. 387/3002 cut-off events. For 1007/1065 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21717 event pairs, 43 based on Foata normal form. 40/2882 useless extension candidates. Maximal degree in co-relation 3942. Up to 300 conditions per place. [2022-07-21 08:33:23,111 INFO L132 encePairwiseOnDemand]: 167/176 looper letters, 86 selfloop transitions, 46 changer transitions 1/273 dead transitions. [2022-07-21 08:33:23,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 1078 flow [2022-07-21 08:33:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:33:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:33:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2831 transitions. [2022-07-21 08:33:23,116 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8936237373737373 [2022-07-21 08:33:23,116 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2831 transitions. [2022-07-21 08:33:23,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2831 transitions. [2022-07-21 08:33:23,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:23,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2831 transitions. [2022-07-21 08:33:23,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.27777777777777) internal successors, (2831), 18 states have internal predecessors, (2831), 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) [2022-07-21 08:33:23,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:33:23,127 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:33:23,127 INFO L186 Difference]: Start difference. First operand has 164 places, 163 transitions, 396 flow. Second operand 18 states and 2831 transitions. [2022-07-21 08:33:23,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 1078 flow [2022-07-21 08:33:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 1016 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:23,133 INFO L242 Difference]: Finished difference. Result has 185 places, 218 transitions, 767 flow [2022-07-21 08:33:23,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=767, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2022-07-21 08:33:23,134 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 24 predicate places. [2022-07-21 08:33:23,134 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 767 flow [2022-07-21 08:33:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 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) [2022-07-21 08:33:23,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:23,135 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:23,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:33:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:23,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 754166100, now seen corresponding path program 1 times [2022-07-21 08:33:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366292106] [2022-07-21 08:33:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366292106] [2022-07-21 08:33:23,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366292106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:23,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:23,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:33:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227588836] [2022-07-21 08:33:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:33:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:33:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:33:23,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 176 [2022-07-21 08:33:23,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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) [2022-07-21 08:33:23,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:23,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 176 [2022-07-21 08:33:23,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:23,514 INFO L129 PetriNetUnfolder]: 54/1111 cut-off events. [2022-07-21 08:33:23,515 INFO L130 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-07-21 08:33:23,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1111 events. 54/1111 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4843 event pairs, 9 based on Foata normal form. 18/1086 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-07-21 08:33:23,520 INFO L132 encePairwiseOnDemand]: 172/176 looper letters, 12 selfloop transitions, 4 changer transitions 0/177 dead transitions. [2022-07-21 08:33:23,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 177 transitions, 544 flow [2022-07-21 08:33:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:33:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:33:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-07-21 08:33:23,522 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-07-21 08:33:23,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-07-21 08:33:23,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-07-21 08:33:23,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:23,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-07-21 08:33:23,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-07-21 08:33:23,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:23,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2022-07-21 08:33:23,524 INFO L186 Difference]: Start difference. First operand has 185 places, 218 transitions, 767 flow. Second operand 3 states and 480 transitions. [2022-07-21 08:33:23,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 177 transitions, 544 flow [2022-07-21 08:33:23,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 522 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-21 08:33:23,529 INFO L242 Difference]: Finished difference. Result has 175 places, 175 transitions, 491 flow [2022-07-21 08:33:23,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2022-07-21 08:33:23,529 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 14 predicate places. [2022-07-21 08:33:23,530 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 491 flow [2022-07-21 08:33:23,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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) [2022-07-21 08:33:23,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:23,530 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:33:23,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2063782862, now seen corresponding path program 1 times [2022-07-21 08:33:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485227877] [2022-07-21 08:33:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485227877] [2022-07-21 08:33:24,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485227877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:24,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:24,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-21 08:33:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922033622] [2022-07-21 08:33:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 08:33:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 08:33:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-21 08:33:24,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-21 08:33:24,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 491 flow. Second operand has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 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) [2022-07-21 08:33:24,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:24,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-21 08:33:24,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:26,674 INFO L129 PetriNetUnfolder]: 1122/4498 cut-off events. [2022-07-21 08:33:26,674 INFO L130 PetriNetUnfolder]: For 906/906 co-relation queries the response was YES. [2022-07-21 08:33:26,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8480 conditions, 4498 events. 1122/4498 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31947 event pairs, 173 based on Foata normal form. 20/4368 useless extension candidates. Maximal degree in co-relation 5128. Up to 1458 conditions per place. [2022-07-21 08:33:26,698 INFO L132 encePairwiseOnDemand]: 139/176 looper letters, 249 selfloop transitions, 59 changer transitions 33/427 dead transitions. [2022-07-21 08:33:26,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 427 transitions, 1859 flow [2022-07-21 08:33:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 08:33:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 08:33:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4579 transitions. [2022-07-21 08:33:26,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5912964876033058 [2022-07-21 08:33:26,707 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4579 transitions. [2022-07-21 08:33:26,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4579 transitions. [2022-07-21 08:33:26,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:26,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4579 transitions. [2022-07-21 08:33:26,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 104.06818181818181) internal successors, (4579), 44 states have internal predecessors, (4579), 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) [2022-07-21 08:33:26,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 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) [2022-07-21 08:33:26,726 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 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) [2022-07-21 08:33:26,726 INFO L186 Difference]: Start difference. First operand has 175 places, 175 transitions, 491 flow. Second operand 44 states and 4579 transitions. [2022-07-21 08:33:26,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 427 transitions, 1859 flow [2022-07-21 08:33:26,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 427 transitions, 1855 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:33:26,733 INFO L242 Difference]: Finished difference. Result has 256 places, 230 transitions, 974 flow [2022-07-21 08:33:26,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=974, PETRI_PLACES=256, PETRI_TRANSITIONS=230} [2022-07-21 08:33:26,734 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 95 predicate places. [2022-07-21 08:33:26,734 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 230 transitions, 974 flow [2022-07-21 08:33:26,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 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) [2022-07-21 08:33:26,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:26,736 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:26,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:33:26,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash -373448104, now seen corresponding path program 2 times [2022-07-21 08:33:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76829987] [2022-07-21 08:33:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76829987] [2022-07-21 08:33:27,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76829987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:27,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:27,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-21 08:33:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078798264] [2022-07-21 08:33:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 08:33:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 08:33:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-07-21 08:33:27,562 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-21 08:33:27,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 230 transitions, 974 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 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) [2022-07-21 08:33:27,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:27,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-21 08:33:27,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:30,639 INFO L129 PetriNetUnfolder]: 1758/7110 cut-off events. [2022-07-21 08:33:30,639 INFO L130 PetriNetUnfolder]: For 5414/5417 co-relation queries the response was YES. [2022-07-21 08:33:30,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 7110 events. 1758/7110 cut-off events. For 5414/5417 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 54476 event pairs, 448 based on Foata normal form. 15/6993 useless extension candidates. Maximal degree in co-relation 11020. Up to 2353 conditions per place. [2022-07-21 08:33:30,689 INFO L132 encePairwiseOnDemand]: 138/176 looper letters, 291 selfloop transitions, 61 changer transitions 26/454 dead transitions. [2022-07-21 08:33:30,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 454 transitions, 2771 flow [2022-07-21 08:33:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 08:33:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 08:33:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3181 transitions. [2022-07-21 08:33:30,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5163961038961039 [2022-07-21 08:33:30,694 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3181 transitions. [2022-07-21 08:33:30,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3181 transitions. [2022-07-21 08:33:30,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:30,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3181 transitions. [2022-07-21 08:33:30,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.88571428571429) internal successors, (3181), 35 states have internal predecessors, (3181), 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) [2022-07-21 08:33:30,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 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) [2022-07-21 08:33:30,708 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 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) [2022-07-21 08:33:30,708 INFO L186 Difference]: Start difference. First operand has 256 places, 230 transitions, 974 flow. Second operand 35 states and 3181 transitions. [2022-07-21 08:33:30,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 454 transitions, 2771 flow [2022-07-21 08:33:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 454 transitions, 2759 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:30,728 INFO L242 Difference]: Finished difference. Result has 304 places, 265 transitions, 1449 flow [2022-07-21 08:33:30,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1449, PETRI_PLACES=304, PETRI_TRANSITIONS=265} [2022-07-21 08:33:30,729 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 143 predicate places. [2022-07-21 08:33:30,729 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 265 transitions, 1449 flow [2022-07-21 08:33:30,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 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) [2022-07-21 08:33:30,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:30,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:30,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:33:30,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:30,731 INFO L85 PathProgramCache]: Analyzing trace with hash 763029134, now seen corresponding path program 3 times [2022-07-21 08:33:30,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:30,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845462163] [2022-07-21 08:33:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:31,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:31,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845462163] [2022-07-21 08:33:31,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845462163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:31,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:31,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-21 08:33:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221496624] [2022-07-21 08:33:31,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:31,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 08:33:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 08:33:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-21 08:33:31,469 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-21 08:33:31,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 265 transitions, 1449 flow. Second operand has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 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) [2022-07-21 08:33:31,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:31,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-21 08:33:31,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:35,055 INFO L129 PetriNetUnfolder]: 2029/8293 cut-off events. [2022-07-21 08:33:35,056 INFO L130 PetriNetUnfolder]: For 8659/8662 co-relation queries the response was YES. [2022-07-21 08:33:35,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8293 events. 2029/8293 cut-off events. For 8659/8662 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 67672 event pairs, 336 based on Foata normal form. 13/8152 useless extension candidates. Maximal degree in co-relation 12386. Up to 2262 conditions per place. [2022-07-21 08:33:35,118 INFO L132 encePairwiseOnDemand]: 140/176 looper letters, 293 selfloop transitions, 77 changer transitions 26/472 dead transitions. [2022-07-21 08:33:35,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 472 transitions, 3227 flow [2022-07-21 08:33:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:33:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:33:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3098 transitions. [2022-07-21 08:33:35,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5177139037433155 [2022-07-21 08:33:35,123 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3098 transitions. [2022-07-21 08:33:35,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3098 transitions. [2022-07-21 08:33:35,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:35,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3098 transitions. [2022-07-21 08:33:35,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.11764705882354) internal successors, (3098), 34 states have internal predecessors, (3098), 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) [2022-07-21 08:33:35,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 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) [2022-07-21 08:33:35,144 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 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) [2022-07-21 08:33:35,144 INFO L186 Difference]: Start difference. First operand has 304 places, 265 transitions, 1449 flow. Second operand 34 states and 3098 transitions. [2022-07-21 08:33:35,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 472 transitions, 3227 flow [2022-07-21 08:33:35,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 472 transitions, 3175 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-07-21 08:33:35,175 INFO L242 Difference]: Finished difference. Result has 338 places, 283 transitions, 1836 flow [2022-07-21 08:33:35,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1836, PETRI_PLACES=338, PETRI_TRANSITIONS=283} [2022-07-21 08:33:35,177 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 177 predicate places. [2022-07-21 08:33:35,178 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 283 transitions, 1836 flow [2022-07-21 08:33:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 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) [2022-07-21 08:33:35,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:35,179 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:33:35,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash -870596139, now seen corresponding path program 1 times [2022-07-21 08:33:35,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367034130] [2022-07-21 08:33:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:35,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:35,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367034130] [2022-07-21 08:33:35,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367034130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089817076] [2022-07-21 08:33:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:35,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:35,740 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) [2022-07-21 08:33:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:33:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 08:33:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:36,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-21 08:33:37,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-21 08:33:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:37,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:38,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-07-21 08:33:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 08:33:38,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089817076] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:38,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:33:38,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-07-21 08:33:38,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381067229] [2022-07-21 08:33:38,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:38,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 08:33:38,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:38,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 08:33:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 08:33:38,594 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-21 08:33:38,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 283 transitions, 1836 flow. Second operand has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 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) [2022-07-21 08:33:38,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:38,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-21 08:33:38,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:45,106 INFO L129 PetriNetUnfolder]: 2737/11264 cut-off events. [2022-07-21 08:33:45,107 INFO L130 PetriNetUnfolder]: For 15461/15461 co-relation queries the response was YES. [2022-07-21 08:33:45,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 11264 events. 2737/11264 cut-off events. For 15461/15461 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 100525 event pairs, 405 based on Foata normal form. 8/11055 useless extension candidates. Maximal degree in co-relation 15448. Up to 1518 conditions per place. [2022-07-21 08:33:45,208 INFO L132 encePairwiseOnDemand]: 143/176 looper letters, 281 selfloop transitions, 210 changer transitions 3/580 dead transitions. [2022-07-21 08:33:45,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 580 transitions, 4357 flow [2022-07-21 08:33:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 08:33:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-21 08:33:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6634 transitions. [2022-07-21 08:33:45,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5798951048951049 [2022-07-21 08:33:45,214 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6634 transitions. [2022-07-21 08:33:45,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6634 transitions. [2022-07-21 08:33:45,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:45,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6634 transitions. [2022-07-21 08:33:45,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 102.06153846153846) internal successors, (6634), 65 states have internal predecessors, (6634), 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) [2022-07-21 08:33:45,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 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) [2022-07-21 08:33:45,237 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 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) [2022-07-21 08:33:45,237 INFO L186 Difference]: Start difference. First operand has 338 places, 283 transitions, 1836 flow. Second operand 65 states and 6634 transitions. [2022-07-21 08:33:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 580 transitions, 4357 flow [2022-07-21 08:33:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 4291 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-07-21 08:33:45,297 INFO L242 Difference]: Finished difference. Result has 401 places, 402 transitions, 3325 flow [2022-07-21 08:33:45,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3325, PETRI_PLACES=401, PETRI_TRANSITIONS=402} [2022-07-21 08:33:45,299 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 240 predicate places. [2022-07-21 08:33:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 402 transitions, 3325 flow [2022-07-21 08:33:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 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) [2022-07-21 08:33:45,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:45,300 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:45,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:33:45,535 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 [2022-07-21 08:33:45,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:33:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1544280769, now seen corresponding path program 2 times [2022-07-21 08:33:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:45,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467098477] [2022-07-21 08:33:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467098477] [2022-07-21 08:33:46,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467098477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332625499] [2022-07-21 08:33:46,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:33:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:46,528 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) [2022-07-21 08:33:46,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:33:46,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 08:33:46,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:33:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 08:33:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:46,738 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 08:33:46,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-21 08:33:46,753 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 08:33:46,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 08:33:47,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-21 08:33:47,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-07-21 08:33:48,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-21 08:33:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 08:33:48,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:48,704 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_244) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-07-21 08:33:48,741 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 08:33:48,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-21 08:33:48,748 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 08:33:48,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-07-21 08:33:48,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-21 08:33:49,423 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 08:33:49,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 08:33:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2022-07-21 08:33:49,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332625499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:49,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:49,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 76 [2022-07-21 08:33:49,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458121609] [2022-07-21 08:33:49,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:49,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-21 08:33:49,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-21 08:33:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=5275, Unknown=1, NotChecked=146, Total=5700 [2022-07-21 08:33:49,431 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-21 08:33:49,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 402 transitions, 3325 flow. Second operand has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 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) [2022-07-21 08:33:49,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:49,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-21 08:33:49,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:48,775 INFO L129 PetriNetUnfolder]: 4492/19958 cut-off events. [2022-07-21 08:34:48,775 INFO L130 PetriNetUnfolder]: For 43776/43783 co-relation queries the response was YES. [2022-07-21 08:34:49,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57271 conditions, 19958 events. 4492/19958 cut-off events. For 43776/43783 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 202079 event pairs, 457 based on Foata normal form. 44/19639 useless extension candidates. Maximal degree in co-relation 32292. Up to 2318 conditions per place. [2022-07-21 08:34:49,066 INFO L132 encePairwiseOnDemand]: 131/176 looper letters, 736 selfloop transitions, 825 changer transitions 39/1676 dead transitions. [2022-07-21 08:34:49,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1676 transitions, 14780 flow [2022-07-21 08:34:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-07-21 08:34:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2022-07-21 08:34:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 22286 transitions. [2022-07-21 08:34:49,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.49462890625 [2022-07-21 08:34:49,090 INFO L72 ComplementDD]: Start complementDD. Operand 256 states and 22286 transitions. [2022-07-21 08:34:49,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 256 states and 22286 transitions. [2022-07-21 08:34:49,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:49,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 256 states and 22286 transitions. [2022-07-21 08:34:49,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 257 states, 256 states have (on average 87.0546875) internal successors, (22286), 256 states have internal predecessors, (22286), 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) [2022-07-21 08:34:49,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 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) [2022-07-21 08:34:49,192 INFO L81 ComplementDD]: Finished complementDD. Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 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) [2022-07-21 08:34:49,192 INFO L186 Difference]: Start difference. First operand has 401 places, 402 transitions, 3325 flow. Second operand 256 states and 22286 transitions. [2022-07-21 08:34:49,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1676 transitions, 14780 flow [2022-07-21 08:34:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1676 transitions, 12911 flow, removed 899 selfloop flow, removed 9 redundant places. [2022-07-21 08:34:49,442 INFO L242 Difference]: Finished difference. Result has 690 places, 1071 transitions, 9996 flow [2022-07-21 08:34:49,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=256, PETRI_FLOW=9996, PETRI_PLACES=690, PETRI_TRANSITIONS=1071} [2022-07-21 08:34:49,444 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 529 predicate places. [2022-07-21 08:34:49,444 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1071 transitions, 9996 flow [2022-07-21 08:34:49,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 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) [2022-07-21 08:34:49,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:49,446 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:49,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 08:34:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:49,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1608662003, now seen corresponding path program 1 times [2022-07-21 08:34:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227359678] [2022-07-21 08:34:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:34:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227359678] [2022-07-21 08:34:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227359678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2779216] [2022-07-21 08:34:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:49,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:49,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:34:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:34:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 08:34:50,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 08:34:50,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2779216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:50,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:50,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-07-21 08:34:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616600903] [2022-07-21 08:34:50,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:50,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 08:34:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 08:34:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-21 08:34:50,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 176 [2022-07-21 08:34:50,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1071 transitions, 9996 flow. Second operand has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 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) [2022-07-21 08:34:50,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:50,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 176 [2022-07-21 08:34:50,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:54,713 INFO L129 PetriNetUnfolder]: 1397/14428 cut-off events. [2022-07-21 08:34:54,713 INFO L130 PetriNetUnfolder]: For 68989/69094 co-relation queries the response was YES. [2022-07-21 08:34:54,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 14428 events. 1397/14428 cut-off events. For 68989/69094 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 145511 event pairs, 297 based on Foata normal form. 29/14070 useless extension candidates. Maximal degree in co-relation 44938. Up to 1037 conditions per place. [2022-07-21 08:34:54,952 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 270 selfloop transitions, 200 changer transitions 3/1226 dead transitions. [2022-07-21 08:34:54,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1226 transitions, 12472 flow [2022-07-21 08:34:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:34:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:34:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2756 transitions. [2022-07-21 08:34:54,955 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8699494949494949 [2022-07-21 08:34:54,955 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2756 transitions. [2022-07-21 08:34:54,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2756 transitions. [2022-07-21 08:34:54,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:54,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2756 transitions. [2022-07-21 08:34:54,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.11111111111111) internal successors, (2756), 18 states have internal predecessors, (2756), 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) [2022-07-21 08:34:54,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:34:54,961 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:34:54,962 INFO L186 Difference]: Start difference. First operand has 690 places, 1071 transitions, 9996 flow. Second operand 18 states and 2756 transitions. [2022-07-21 08:34:54,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1226 transitions, 12472 flow [2022-07-21 08:34:55,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 1226 transitions, 10636 flow, removed 657 selfloop flow, removed 30 redundant places. [2022-07-21 08:34:55,378 INFO L242 Difference]: Finished difference. Result has 672 places, 1126 transitions, 9524 flow [2022-07-21 08:34:55,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9524, PETRI_PLACES=672, PETRI_TRANSITIONS=1126} [2022-07-21 08:34:55,379 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 511 predicate places. [2022-07-21 08:34:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1126 transitions, 9524 flow [2022-07-21 08:34:55,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 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) [2022-07-21 08:34:55,380 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:55,380 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:55,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 08:34:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:55,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1324549368, now seen corresponding path program 2 times [2022-07-21 08:34:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343565509] [2022-07-21 08:34:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343565509] [2022-07-21 08:34:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343565509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:55,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812963190] [2022-07-21 08:34:55,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:34:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:55,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:55,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:34:55,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:34:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:34:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:55,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:56,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812963190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:56,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:56,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-07-21 08:34:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182140355] [2022-07-21 08:34:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:34:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:34:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:34:56,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-21 08:34:56,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1126 transitions, 9524 flow. Second operand has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 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) [2022-07-21 08:34:56,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:56,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-21 08:34:56,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:03,052 INFO L129 PetriNetUnfolder]: 1720/18693 cut-off events. [2022-07-21 08:35:03,052 INFO L130 PetriNetUnfolder]: For 93925/94028 co-relation queries the response was YES. [2022-07-21 08:35:03,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56615 conditions, 18693 events. 1720/18693 cut-off events. For 93925/94028 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 196293 event pairs, 367 based on Foata normal form. 56/18266 useless extension candidates. Maximal degree in co-relation 55918. Up to 1525 conditions per place. [2022-07-21 08:35:03,341 INFO L132 encePairwiseOnDemand]: 169/176 looper letters, 356 selfloop transitions, 197 changer transitions 1/1327 dead transitions. [2022-07-21 08:35:03,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1327 transitions, 12592 flow [2022-07-21 08:35:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:35:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:35:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-07-21 08:35:03,344 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882260101010101 [2022-07-21 08:35:03,344 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-07-21 08:35:03,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-07-21 08:35:03,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:03,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-07-21 08:35:03,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 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) [2022-07-21 08:35:03,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:35:03,349 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 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) [2022-07-21 08:35:03,349 INFO L186 Difference]: Start difference. First operand has 672 places, 1126 transitions, 9524 flow. Second operand 18 states and 2795 transitions. [2022-07-21 08:35:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1327 transitions, 12592 flow [2022-07-21 08:35:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1327 transitions, 12418 flow, removed 77 selfloop flow, removed 5 redundant places. [2022-07-21 08:35:03,794 INFO L242 Difference]: Finished difference. Result has 686 places, 1188 transitions, 10510 flow [2022-07-21 08:35:03,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10510, PETRI_PLACES=686, PETRI_TRANSITIONS=1188} [2022-07-21 08:35:03,795 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 525 predicate places. [2022-07-21 08:35:03,795 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 1188 transitions, 10510 flow [2022-07-21 08:35:03,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 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) [2022-07-21 08:35:03,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:03,796 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:03,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 08:35:04,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 08:35:04,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:35:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2046476772, now seen corresponding path program 1 times [2022-07-21 08:35:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365439728] [2022-07-21 08:35:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365439728] [2022-07-21 08:35:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365439728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:35:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409255291] [2022-07-21 08:35:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:35:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:35:04,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:35:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:35:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:04,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-21 08:35:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:35:05,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-21 08:35:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 08:35:06,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2022-07-21 08:35:07,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-21 08:35:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:08,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:35:38,252 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 08:35:38,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-21 08:35:38,258 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 08:35:38,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-07-21 08:35:38,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2022-07-21 08:35:38,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 08:35:38,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-07-21 08:35:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409255291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:35:39,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:35:39,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 33] total 92 [2022-07-21 08:35:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860999431] [2022-07-21 08:35:39,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:35:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-21 08:35:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:39,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-21 08:35:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7650, Unknown=28, NotChecked=0, Total=8372 [2022-07-21 08:35:39,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-21 08:35:39,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 1188 transitions, 10510 flow. Second operand has 92 states, 92 states have (on average 100.28260869565217) internal successors, (9226), 92 states have internal predecessors, (9226), 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) [2022-07-21 08:35:39,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:39,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-21 08:35:39,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:55,165 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)