./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_longest-2.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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:39:29,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:39:29,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:39:29,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:39:29,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:39:29,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:39:29,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:39:29,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:39:29,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:39:29,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:39:29,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:39:29,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:39:29,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:39:29,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:39:29,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:39:29,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:39:29,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:39:29,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:39:29,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:39:29,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:39:29,496 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:39:29,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:39:29,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:39:29,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:39:29,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:39:29,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:39:29,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:39:29,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:39:29,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:39:29,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:39:29,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:39:29,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:39:29,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:39:29,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:39:29,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:39:29,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:39:29,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:39:29,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:39:29,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:39:29,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:39:29,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:39:29,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:39:29,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:39:29,537 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:39:29,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:39:29,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:39:29,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:39:29,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:39:29,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:39:29,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:39:29,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:39:29,539 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:39:29,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:39:29,539 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:39:29,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:39:29,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:39:29,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:39:29,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:39:29,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:39:29,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:39:29,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:29,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:39:29,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:39:29,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:39:29,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:39:29,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:39:29,543 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:39:29,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:39:29,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:39:29,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-07-13 21:39:29,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:39:29,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:39:29,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:39:29,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:39:29,743 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:39:29,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2022-07-13 21:39:29,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d8ca0f/8a1871c0a1d846cbb9b0cf2018884355/FLAGd63fae8cc [2022-07-13 21:39:30,197 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:39:30,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2022-07-13 21:39:30,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d8ca0f/8a1871c0a1d846cbb9b0cf2018884355/FLAGd63fae8cc [2022-07-13 21:39:30,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d8ca0f/8a1871c0a1d846cbb9b0cf2018884355 [2022-07-13 21:39:30,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:39:30,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:39:30,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:30,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:39:30,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:39:30,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:30,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@80e8e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30, skipping insertion in model container [2022-07-13 21:39:30,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:30,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:39:30,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:39:30,867 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_longest-2.i[41530,41543] [2022-07-13 21:39:30,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:30,903 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:39:30,928 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_longest-2.i[41530,41543] [2022-07-13 21:39:30,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:30,989 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:39:30,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30 WrapperNode [2022-07-13 21:39:30,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:30,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:30,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:39:30,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:39:30,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,050 INFO L137 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-07-13 21:39:31,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:31,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:39:31,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:39:31,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:39:31,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:39:31,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:39:31,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:39:31,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:39:31,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (1/1) ... [2022-07-13 21:39:31,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:31,117 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) [2022-07-13 21:39:31,137 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 [2022-07-13 21:39:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-13 21:39:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-13 21:39:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-13 21:39:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-13 21:39:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:39:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:39:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:39:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:39:31,155 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:39:31,264 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:39:31,265 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:39:31,414 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:39:31,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:39:31,425 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:39:31,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:31 BoogieIcfgContainer [2022-07-13 21:39:31,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:39:31,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:39:31,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:39:31,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:39:31,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:39:30" (1/3) ... [2022-07-13 21:39:31,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f814ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:31, skipping insertion in model container [2022-07-13 21:39:31,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:30" (2/3) ... [2022-07-13 21:39:31,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f814ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:31, skipping insertion in model container [2022-07-13 21:39:31,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:31" (3/3) ... [2022-07-13 21:39:31,438 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-07-13 21:39:31,444 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:39:31,450 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:39:31,450 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:39:31,450 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:39:31,532 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:39:31,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 360 flow [2022-07-13 21:39:31,628 INFO L129 PetriNetUnfolder]: 10/170 cut-off events. [2022-07-13 21:39:31,628 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:39:31,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 10/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 416 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-07-13 21:39:31,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 172 transitions, 360 flow [2022-07-13 21:39:31,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 329 flow [2022-07-13 21:39:31,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:39:31,663 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@3825335f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69b67ae0 [2022-07-13 21:39:31,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:39:31,706 INFO L129 PetriNetUnfolder]: 5/129 cut-off events. [2022-07-13 21:39:31,707 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:39:31,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:31,708 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] [2022-07-13 21:39:31,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2105074172, now seen corresponding path program 1 times [2022-07-13 21:39:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740510292] [2022-07-13 21:39:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:31,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:31,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740510292] [2022-07-13 21:39:31,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740510292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:31,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:31,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:39:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532560848] [2022-07-13 21:39:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:31,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:39:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:39:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:39:31,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-07-13 21:39:31,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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) [2022-07-13 21:39:31,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:31,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-07-13 21:39:31,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:32,132 INFO L129 PetriNetUnfolder]: 88/699 cut-off events. [2022-07-13 21:39:32,132 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-13 21:39:32,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 699 events. 88/699 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3098 event pairs, 32 based on Foata normal form. 69/702 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-07-13 21:39:32,141 INFO L132 encePairwiseOnDemand]: 162/172 looper letters, 20 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2022-07-13 21:39:32,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 377 flow [2022-07-13 21:39:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:39:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:39:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-07-13 21:39:32,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9282945736434108 [2022-07-13 21:39:32,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-07-13 21:39:32,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-07-13 21:39:32,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:32,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-07-13 21:39:32,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2022-07-13 21:39:32,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:32,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:32,200 INFO L186 Difference]: Start difference. First operand has 157 places, 160 transitions, 329 flow. Second operand 3 states and 479 transitions. [2022-07-13 21:39:32,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 377 flow [2022-07-13 21:39:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:39:32,208 INFO L242 Difference]: Finished difference. Result has 153 places, 152 transitions, 323 flow [2022-07-13 21:39:32,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2022-07-13 21:39:32,214 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2022-07-13 21:39:32,214 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 323 flow [2022-07-13 21:39:32,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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) [2022-07-13 21:39:32,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:32,216 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] [2022-07-13 21:39:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:39:32,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212847, now seen corresponding path program 1 times [2022-07-13 21:39:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:32,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515219060] [2022-07-13 21:39:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:32,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515219060] [2022-07-13 21:39:32,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515219060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:32,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:32,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:39:32,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416570534] [2022-07-13 21:39:32,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:39:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:39:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:39:32,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 172 [2022-07-13 21:39:32,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 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) [2022-07-13 21:39:32,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:32,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 172 [2022-07-13 21:39:32,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:32,452 INFO L129 PetriNetUnfolder]: 34/590 cut-off events. [2022-07-13 21:39:32,453 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:39:32,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 590 events. 34/590 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2047 event pairs, 11 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-07-13 21:39:32,457 INFO L132 encePairwiseOnDemand]: 167/172 looper letters, 16 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2022-07-13 21:39:32,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 384 flow [2022-07-13 21:39:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:39:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:39:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-07-13 21:39:32,459 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9142441860465116 [2022-07-13 21:39:32,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-07-13 21:39:32,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-07-13 21:39:32,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:32,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-07-13 21:39:32,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:32,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2022-07-13 21:39:32,463 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2022-07-13 21:39:32,463 INFO L186 Difference]: Start difference. First operand has 153 places, 152 transitions, 323 flow. Second operand 4 states and 629 transitions. [2022-07-13 21:39:32,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 384 flow [2022-07-13 21:39:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:39:32,468 INFO L242 Difference]: Finished difference. Result has 157 places, 155 transitions, 348 flow [2022-07-13 21:39:32,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=155} [2022-07-13 21:39:32,469 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-07-13 21:39:32,470 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 155 transitions, 348 flow [2022-07-13 21:39:32,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 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) [2022-07-13 21:39:32,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:32,470 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] [2022-07-13 21:39:32,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:39:32,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1628458080, now seen corresponding path program 1 times [2022-07-13 21:39:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724571285] [2022-07-13 21:39:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724571285] [2022-07-13 21:39:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724571285] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:32,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:39:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351596794] [2022-07-13 21:39:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:39:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:39:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:39:32,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-07-13 21:39:32,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 155 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-07-13 21:39:32,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:32,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-07-13 21:39:32,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:32,719 INFO L129 PetriNetUnfolder]: 127/1267 cut-off events. [2022-07-13 21:39:32,720 INFO L130 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-07-13 21:39:32,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 1267 events. 127/1267 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6947 event pairs, 33 based on Foata normal form. 12/1205 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-07-13 21:39:32,728 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 25 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2022-07-13 21:39:32,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 439 flow [2022-07-13 21:39:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:39:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:39:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-07-13 21:39:32,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9186046511627907 [2022-07-13 21:39:32,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-07-13 21:39:32,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-07-13 21:39:32,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:32,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-07-13 21:39:32,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 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) [2022-07-13 21:39:32,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:32,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:32,734 INFO L186 Difference]: Start difference. First operand has 157 places, 155 transitions, 348 flow. Second operand 3 states and 474 transitions. [2022-07-13 21:39:32,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 439 flow [2022-07-13 21:39:32,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 167 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:39:32,740 INFO L242 Difference]: Finished difference. Result has 160 places, 159 transitions, 388 flow [2022-07-13 21:39:32,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-07-13 21:39:32,741 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 3 predicate places. [2022-07-13 21:39:32,742 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 388 flow [2022-07-13 21:39:32,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-07-13 21:39:32,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:32,742 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] [2022-07-13 21:39:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:39:32,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 585023441, now seen corresponding path program 1 times [2022-07-13 21:39:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483280928] [2022-07-13 21:39:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:32,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483280928] [2022-07-13 21:39:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483280928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:32,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320614412] [2022-07-13 21:39:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:32,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:32,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:32,840 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) [2022-07-13 21:39:32,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:39:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:32,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:39:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:33,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:33,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320614412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:33,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:33,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:39:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611414158] [2022-07-13 21:39:33,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:39:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:39:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:39:33,205 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-13 21:39:33,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 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) [2022-07-13 21:39:33,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:33,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-13 21:39:33,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:33,562 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([465] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][178], [Black: 174#(= ~top~0 0), 113#L945-2true, 30#L1008-1true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 186#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 230#(<= ~top~0 0), Black: 188#(<= 1 ~top~0)]) [2022-07-13 21:39:33,562 INFO L384 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-07-13 21:39:33,564 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-07-13 21:39:33,564 INFO L387 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-07-13 21:39:33,564 INFO L387 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-07-13 21:39:33,564 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([464] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][179], [Black: 174#(= ~top~0 0), 72#L1010true, 113#L945-2true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 192#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 188#(<= 1 ~top~0), Black: 186#true]) [2022-07-13 21:39:33,565 INFO L384 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-07-13 21:39:33,565 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-07-13 21:39:33,565 INFO L387 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-07-13 21:39:33,565 INFO L387 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-07-13 21:39:33,624 INFO L129 PetriNetUnfolder]: 387/2990 cut-off events. [2022-07-13 21:39:33,626 INFO L130 PetriNetUnfolder]: For 1008/1064 co-relation queries the response was YES. [2022-07-13 21:39:33,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 2990 events. 387/2990 cut-off events. For 1008/1064 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21582 event pairs, 43 based on Foata normal form. 40/2871 useless extension candidates. Maximal degree in co-relation 3934. Up to 300 conditions per place. [2022-07-13 21:39:33,639 INFO L132 encePairwiseOnDemand]: 163/172 looper letters, 86 selfloop transitions, 46 changer transitions 1/269 dead transitions. [2022-07-13 21:39:33,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 269 transitions, 1070 flow [2022-07-13 21:39:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:39:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:39:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2759 transitions. [2022-07-13 21:39:33,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8911498708010336 [2022-07-13 21:39:33,643 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2759 transitions. [2022-07-13 21:39:33,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2759 transitions. [2022-07-13 21:39:33,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:33,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2759 transitions. [2022-07-13 21:39:33,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.27777777777777) internal successors, (2759), 18 states have internal predecessors, (2759), 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) [2022-07-13 21:39:33,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-07-13 21:39:33,654 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-07-13 21:39:33,654 INFO L186 Difference]: Start difference. First operand has 160 places, 159 transitions, 388 flow. Second operand 18 states and 2759 transitions. [2022-07-13 21:39:33,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 269 transitions, 1070 flow [2022-07-13 21:39:33,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 269 transitions, 1008 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:33,662 INFO L242 Difference]: Finished difference. Result has 181 places, 214 transitions, 759 flow [2022-07-13 21:39:33,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=759, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2022-07-13 21:39:33,663 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 24 predicate places. [2022-07-13 21:39:33,663 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 759 flow [2022-07-13 21:39:33,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 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) [2022-07-13 21:39:33,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:33,664 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] [2022-07-13 21:39:33,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:33,879 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 [2022-07-13 21:39:33,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -240965741, now seen corresponding path program 1 times [2022-07-13 21:39:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:33,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283974052] [2022-07-13 21:39:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:33,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283974052] [2022-07-13 21:39:33,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283974052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:33,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:33,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:39:33,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652117300] [2022-07-13 21:39:33,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:39:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:39:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:39:33,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-07-13 21:39:33,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 759 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) [2022-07-13 21:39:33,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:33,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-07-13 21:39:33,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:34,064 INFO L129 PetriNetUnfolder]: 53/1113 cut-off events. [2022-07-13 21:39:34,065 INFO L130 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-07-13 21:39:34,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1113 events. 53/1113 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4883 event pairs, 9 based on Foata normal form. 17/1088 useless extension candidates. Maximal degree in co-relation 997. Up to 49 conditions per place. [2022-07-13 21:39:34,069 INFO L132 encePairwiseOnDemand]: 168/172 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-07-13 21:39:34,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 536 flow [2022-07-13 21:39:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:39:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:39:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-07-13 21:39:34,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2022-07-13 21:39:34,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-07-13 21:39:34,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-07-13 21:39:34,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:34,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-07-13 21:39:34,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2022-07-13 21:39:34,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:34,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-07-13 21:39:34,073 INFO L186 Difference]: Start difference. First operand has 181 places, 214 transitions, 759 flow. Second operand 3 states and 468 transitions. [2022-07-13 21:39:34,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 536 flow [2022-07-13 21:39:34,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-13 21:39:34,078 INFO L242 Difference]: Finished difference. Result has 171 places, 171 transitions, 483 flow [2022-07-13 21:39:34,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2022-07-13 21:39:34,080 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 14 predicate places. [2022-07-13 21:39:34,080 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 483 flow [2022-07-13 21:39:34,080 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) [2022-07-13 21:39:34,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:34,081 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] [2022-07-13 21:39:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:39:34,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1489789719, now seen corresponding path program 1 times [2022-07-13 21:39:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:34,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530999572] [2022-07-13 21:39:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:34,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530999572] [2022-07-13 21:39:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530999572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:34,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-13 21:39:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116732486] [2022-07-13 21:39:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:34,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:39:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:39:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:39:34,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-07-13 21:39:34,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 483 flow. Second operand has 25 states, 25 states have (on average 99.28) internal successors, (2482), 25 states have internal predecessors, (2482), 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) [2022-07-13 21:39:34,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:34,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-07-13 21:39:34,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:36,467 INFO L129 PetriNetUnfolder]: 1109/4447 cut-off events. [2022-07-13 21:39:36,468 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-13 21:39:36,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 4447 events. 1109/4447 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33104 event pairs, 163 based on Foata normal form. 0/4295 useless extension candidates. Maximal degree in co-relation 4749. Up to 1468 conditions per place. [2022-07-13 21:39:36,488 INFO L132 encePairwiseOnDemand]: 138/172 looper letters, 254 selfloop transitions, 42 changer transitions 2/384 dead transitions. [2022-07-13 21:39:36,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 384 transitions, 1688 flow [2022-07-13 21:39:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 21:39:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-13 21:39:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3271 transitions. [2022-07-13 21:39:36,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6134658664666166 [2022-07-13 21:39:36,495 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3271 transitions. [2022-07-13 21:39:36,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3271 transitions. [2022-07-13 21:39:36,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:36,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3271 transitions. [2022-07-13 21:39:36,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.51612903225806) internal successors, (3271), 31 states have internal predecessors, (3271), 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) [2022-07-13 21:39:36,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 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) [2022-07-13 21:39:36,511 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 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) [2022-07-13 21:39:36,511 INFO L186 Difference]: Start difference. First operand has 171 places, 171 transitions, 483 flow. Second operand 31 states and 3271 transitions. [2022-07-13 21:39:36,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 384 transitions, 1688 flow [2022-07-13 21:39:36,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 384 transitions, 1684 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:39:36,520 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 797 flow [2022-07-13 21:39:36,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=797, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-07-13 21:39:36,521 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 70 predicate places. [2022-07-13 21:39:36,521 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 797 flow [2022-07-13 21:39:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 99.28) internal successors, (2482), 25 states have internal predecessors, (2482), 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) [2022-07-13 21:39:36,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:36,522 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] [2022-07-13 21:39:36,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:39:36,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1146657715, now seen corresponding path program 2 times [2022-07-13 21:39:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703328249] [2022-07-13 21:39:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703328249] [2022-07-13 21:39:37,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703328249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:37,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:37,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-13 21:39:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045578173] [2022-07-13 21:39:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:39:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:39:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:39:37,313 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-07-13 21:39:37,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 797 flow. Second operand has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 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) [2022-07-13 21:39:37,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:37,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-07-13 21:39:37,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:39,701 INFO L129 PetriNetUnfolder]: 1483/6023 cut-off events. [2022-07-13 21:39:39,701 INFO L130 PetriNetUnfolder]: For 2906/2906 co-relation queries the response was YES. [2022-07-13 21:39:39,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13060 conditions, 6023 events. 1483/6023 cut-off events. For 2906/2906 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 48983 event pairs, 307 based on Foata normal form. 4/5913 useless extension candidates. Maximal degree in co-relation 7868. Up to 1499 conditions per place. [2022-07-13 21:39:39,747 INFO L132 encePairwiseOnDemand]: 136/172 looper letters, 261 selfloop transitions, 60 changer transitions 2/399 dead transitions. [2022-07-13 21:39:39,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 399 transitions, 2193 flow [2022-07-13 21:39:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 21:39:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-13 21:39:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2920 transitions. [2022-07-13 21:39:39,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5305232558139535 [2022-07-13 21:39:39,753 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2920 transitions. [2022-07-13 21:39:39,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2920 transitions. [2022-07-13 21:39:39,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:39,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2920 transitions. [2022-07-13 21:39:39,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.25) internal successors, (2920), 32 states have internal predecessors, (2920), 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) [2022-07-13 21:39:39,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 172.0) internal successors, (5676), 33 states have internal predecessors, (5676), 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) [2022-07-13 21:39:39,765 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 172.0) internal successors, (5676), 33 states have internal predecessors, (5676), 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) [2022-07-13 21:39:39,765 INFO L186 Difference]: Start difference. First operand has 227 places, 209 transitions, 797 flow. Second operand 32 states and 2920 transitions. [2022-07-13 21:39:39,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 399 transitions, 2193 flow [2022-07-13 21:39:39,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 399 transitions, 2189 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:39,777 INFO L242 Difference]: Finished difference. Result has 271 places, 228 transitions, 1115 flow [2022-07-13 21:39:39,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1115, PETRI_PLACES=271, PETRI_TRANSITIONS=228} [2022-07-13 21:39:39,777 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 114 predicate places. [2022-07-13 21:39:39,777 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 228 transitions, 1115 flow [2022-07-13 21:39:39,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 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) [2022-07-13 21:39:39,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:39,778 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] [2022-07-13 21:39:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:39:39,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:39,779 INFO L85 PathProgramCache]: Analyzing trace with hash -715293043, now seen corresponding path program 3 times [2022-07-13 21:39:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186672308] [2022-07-13 21:39:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:40,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186672308] [2022-07-13 21:39:40,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186672308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:40,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:40,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-13 21:39:40,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327158638] [2022-07-13 21:39:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:40,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 21:39:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:40,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 21:39:40,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-13 21:39:40,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-07-13 21:39:40,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 228 transitions, 1115 flow. Second operand has 28 states, 28 states have (on average 86.39285714285714) internal successors, (2419), 28 states have internal predecessors, (2419), 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) [2022-07-13 21:39:40,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:40,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-07-13 21:39:40,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:43,199 INFO L129 PetriNetUnfolder]: 1881/7744 cut-off events. [2022-07-13 21:39:43,199 INFO L130 PetriNetUnfolder]: For 4966/4969 co-relation queries the response was YES. [2022-07-13 21:39:43,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17543 conditions, 7744 events. 1881/7744 cut-off events. For 4966/4969 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 68367 event pairs, 146 based on Foata normal form. 5/7587 useless extension candidates. Maximal degree in co-relation 10916. Up to 1429 conditions per place. [2022-07-13 21:39:43,266 INFO L132 encePairwiseOnDemand]: 135/172 looper letters, 284 selfloop transitions, 81 changer transitions 3/444 dead transitions. [2022-07-13 21:39:43,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 444 transitions, 2749 flow [2022-07-13 21:39:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 21:39:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-13 21:39:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3232 transitions. [2022-07-13 21:39:43,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5368770764119601 [2022-07-13 21:39:43,275 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3232 transitions. [2022-07-13 21:39:43,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3232 transitions. [2022-07-13 21:39:43,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:43,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3232 transitions. [2022-07-13 21:39:43,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 92.34285714285714) internal successors, (3232), 35 states have internal predecessors, (3232), 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) [2022-07-13 21:39:43,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 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) [2022-07-13 21:39:43,309 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 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) [2022-07-13 21:39:43,310 INFO L186 Difference]: Start difference. First operand has 271 places, 228 transitions, 1115 flow. Second operand 35 states and 3232 transitions. [2022-07-13 21:39:43,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 444 transitions, 2749 flow [2022-07-13 21:39:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 444 transitions, 2655 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-13 21:39:43,330 INFO L242 Difference]: Finished difference. Result has 306 places, 249 transitions, 1481 flow [2022-07-13 21:39:43,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1481, PETRI_PLACES=306, PETRI_TRANSITIONS=249} [2022-07-13 21:39:43,332 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 149 predicate places. [2022-07-13 21:39:43,332 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 249 transitions, 1481 flow [2022-07-13 21:39:43,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.39285714285714) internal successors, (2419), 28 states have internal predecessors, (2419), 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) [2022-07-13 21:39:43,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:43,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:43,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:39:43,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 717635681, now seen corresponding path program 1 times [2022-07-13 21:39:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797217046] [2022-07-13 21:39:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797217046] [2022-07-13 21:39:43,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797217046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851064043] [2022-07-13 21:39:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:43,404 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) [2022-07-13 21:39:43,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:39:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 21:39:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 21:39:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 21:39:43,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851064043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:43,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:43,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-07-13 21:39:43,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414519708] [2022-07-13 21:39:43,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 21:39:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 21:39:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 21:39:43,759 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 172 [2022-07-13 21:39:43,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 249 transitions, 1481 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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) [2022-07-13 21:39:43,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:43,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 172 [2022-07-13 21:39:43,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:44,427 INFO L129 PetriNetUnfolder]: 266/3674 cut-off events. [2022-07-13 21:39:44,428 INFO L130 PetriNetUnfolder]: For 3249/3253 co-relation queries the response was YES. [2022-07-13 21:39:44,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7392 conditions, 3674 events. 266/3674 cut-off events. For 3249/3253 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 27724 event pairs, 51 based on Foata normal form. 19/3606 useless extension candidates. Maximal degree in co-relation 5500. Up to 153 conditions per place. [2022-07-13 21:39:44,452 INFO L132 encePairwiseOnDemand]: 161/172 looper letters, 53 selfloop transitions, 49 changer transitions 0/288 dead transitions. [2022-07-13 21:39:44,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 288 transitions, 1810 flow [2022-07-13 21:39:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:39:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:39:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2665 transitions. [2022-07-13 21:39:44,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8607881136950905 [2022-07-13 21:39:44,455 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2665 transitions. [2022-07-13 21:39:44,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2665 transitions. [2022-07-13 21:39:44,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:44,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2665 transitions. [2022-07-13 21:39:44,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.05555555555554) internal successors, (2665), 18 states have internal predecessors, (2665), 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) [2022-07-13 21:39:44,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-07-13 21:39:44,462 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-07-13 21:39:44,462 INFO L186 Difference]: Start difference. First operand has 306 places, 249 transitions, 1481 flow. Second operand 18 states and 2665 transitions. [2022-07-13 21:39:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 288 transitions, 1810 flow [2022-07-13 21:39:44,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 288 transitions, 1695 flow, removed 36 selfloop flow, removed 16 redundant places. [2022-07-13 21:39:44,482 INFO L242 Difference]: Finished difference. Result has 311 places, 257 transitions, 1531 flow [2022-07-13 21:39:44,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1531, PETRI_PLACES=311, PETRI_TRANSITIONS=257} [2022-07-13 21:39:44,483 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 154 predicate places. [2022-07-13 21:39:44,483 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 257 transitions, 1531 flow [2022-07-13 21:39:44,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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) [2022-07-13 21:39:44,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:44,483 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] [2022-07-13 21:39:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:44,701 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 [2022-07-13 21:39:44,701 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1173637730, now seen corresponding path program 1 times [2022-07-13 21:39:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464797865] [2022-07-13 21:39:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464797865] [2022-07-13 21:39:45,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464797865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424142802] [2022-07-13 21:39:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:45,245 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) [2022-07-13 21:39:45,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:39:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 21:39:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:46,246 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 [2022-07-13 21:39:46,962 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 [2022-07-13 21:39:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:47,600 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 [2022-07-13 21:39:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:39:48,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424142802] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:48,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:39:48,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-07-13 21:39:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547160675] [2022-07-13 21:39:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:48,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 21:39:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 21:39:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 21:39:48,049 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-07-13 21:39:48,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 257 transitions, 1531 flow. Second operand has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 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) [2022-07-13 21:39:48,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:48,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-07-13 21:39:48,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:54,360 INFO L129 PetriNetUnfolder]: 2699/10934 cut-off events. [2022-07-13 21:39:54,360 INFO L130 PetriNetUnfolder]: For 9667/9670 co-relation queries the response was YES. [2022-07-13 21:39:54,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 10934 events. 2699/10934 cut-off events. For 9667/9670 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 100667 event pairs, 453 based on Foata normal form. 13/10716 useless extension candidates. Maximal degree in co-relation 23300. Up to 1454 conditions per place. [2022-07-13 21:39:54,449 INFO L132 encePairwiseOnDemand]: 137/172 looper letters, 283 selfloop transitions, 187 changer transitions 3/559 dead transitions. [2022-07-13 21:39:54,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 559 transitions, 3975 flow [2022-07-13 21:39:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 21:39:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-13 21:39:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6726 transitions. [2022-07-13 21:39:54,456 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5924947145877378 [2022-07-13 21:39:54,456 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6726 transitions. [2022-07-13 21:39:54,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6726 transitions. [2022-07-13 21:39:54,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:54,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6726 transitions. [2022-07-13 21:39:54,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 101.9090909090909) internal successors, (6726), 66 states have internal predecessors, (6726), 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) [2022-07-13 21:39:54,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 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) [2022-07-13 21:39:54,476 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 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) [2022-07-13 21:39:54,477 INFO L186 Difference]: Start difference. First operand has 311 places, 257 transitions, 1531 flow. Second operand 66 states and 6726 transitions. [2022-07-13 21:39:54,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 559 transitions, 3975 flow [2022-07-13 21:39:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 559 transitions, 3822 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-07-13 21:39:54,514 INFO L242 Difference]: Finished difference. Result has 387 places, 379 transitions, 2819 flow [2022-07-13 21:39:54,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2819, PETRI_PLACES=387, PETRI_TRANSITIONS=379} [2022-07-13 21:39:54,515 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 230 predicate places. [2022-07-13 21:39:54,515 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 379 transitions, 2819 flow [2022-07-13 21:39:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 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) [2022-07-13 21:39:54,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:54,516 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] [2022-07-13 21:39:54,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:54,731 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 [2022-07-13 21:39:54,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:39:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -741723670, now seen corresponding path program 2 times [2022-07-13 21:39:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845367158] [2022-07-13 21:39:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845367158] [2022-07-13 21:39:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845367158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799897342] [2022-07-13 21:39:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:39:55,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:55,601 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) [2022-07-13 21:39:55,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:39:55,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 21:39:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 21:39:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:55,768 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 21:39:55,769 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 [2022-07-13 21:39:55,779 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 21:39:55,780 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 [2022-07-13 21:39:56,408 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 [2022-07-13 21:39:56,498 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 [2022-07-13 21:39:57,260 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 [2022-07-13 21:39:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:39:57,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:58,084 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_303) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-07-13 21:39:58,107 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 21:39:58,107 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 [2022-07-13 21:39:58,114 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 21:39:58,120 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 [2022-07-13 21:39:58,124 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 [2022-07-13 21:39:58,982 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-13 21:39:58,982 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 [2022-07-13 21:39:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:39:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799897342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:58,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:58,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 76 [2022-07-13 21:39:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393934317] [2022-07-13 21:39:58,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-13 21:39:58,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-13 21:39:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=5300, Unknown=1, NotChecked=146, Total=5700 [2022-07-13 21:39:58,989 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-07-13 21:39:58,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 379 transitions, 2819 flow. Second operand has 76 states, 76 states have (on average 87.17105263157895) internal successors, (6625), 76 states have internal predecessors, (6625), 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) [2022-07-13 21:39:58,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-07-13 21:39:58,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:46,304 INFO L129 PetriNetUnfolder]: 4553/18282 cut-off events. [2022-07-13 21:40:46,304 INFO L130 PetriNetUnfolder]: For 22774/22781 co-relation queries the response was YES. [2022-07-13 21:40:46,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48005 conditions, 18282 events. 4553/18282 cut-off events. For 22774/22781 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 186512 event pairs, 235 based on Foata normal form. 12/17938 useless extension candidates. Maximal degree in co-relation 42532. Up to 2434 conditions per place. [2022-07-13 21:40:46,523 INFO L132 encePairwiseOnDemand]: 131/172 looper letters, 634 selfloop transitions, 481 changer transitions 11/1202 dead transitions. [2022-07-13 21:40:46,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1202 transitions, 9087 flow [2022-07-13 21:40:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-07-13 21:40:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2022-07-13 21:40:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 17398 transitions. [2022-07-13 21:40:46,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5134576791405974 [2022-07-13 21:40:46,547 INFO L72 ComplementDD]: Start complementDD. Operand 197 states and 17398 transitions. [2022-07-13 21:40:46,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 197 states and 17398 transitions. [2022-07-13 21:40:46,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:46,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 197 states and 17398 transitions. [2022-07-13 21:40:46,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 198 states, 197 states have (on average 88.31472081218274) internal successors, (17398), 197 states have internal predecessors, (17398), 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) [2022-07-13 21:40:46,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 198 states, 198 states have (on average 172.0) internal successors, (34056), 198 states have internal predecessors, (34056), 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) [2022-07-13 21:40:46,631 INFO L81 ComplementDD]: Finished complementDD. Result has 198 states, 198 states have (on average 172.0) internal successors, (34056), 198 states have internal predecessors, (34056), 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) [2022-07-13 21:40:46,631 INFO L186 Difference]: Start difference. First operand has 387 places, 379 transitions, 2819 flow. Second operand 197 states and 17398 transitions. [2022-07-13 21:40:46,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1202 transitions, 9087 flow [2022-07-13 21:40:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 1202 transitions, 8596 flow, removed 220 selfloop flow, removed 10 redundant places. [2022-07-13 21:40:46,781 INFO L242 Difference]: Finished difference. Result has 612 places, 657 transitions, 5854 flow [2022-07-13 21:40:46,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=197, PETRI_FLOW=5854, PETRI_PLACES=612, PETRI_TRANSITIONS=657} [2022-07-13 21:40:46,782 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 455 predicate places. [2022-07-13 21:40:46,783 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 657 transitions, 5854 flow [2022-07-13 21:40:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 87.17105263157895) internal successors, (6625), 76 states have internal predecessors, (6625), 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) [2022-07-13 21:40:46,784 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:46,784 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] [2022-07-13 21:40:46,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:46,999 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 [2022-07-13 21:40:46,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:40:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -453573317, now seen corresponding path program 2 times [2022-07-13 21:40:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990517120] [2022-07-13 21:40:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:47,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990517120] [2022-07-13 21:40:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990517120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005535787] [2022-07-13 21:40:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:47,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:47,089 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) [2022-07-13 21:40:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:40:47,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:47,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:40:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:47,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:47,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005535787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:47,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:47,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:40:47,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867018733] [2022-07-13 21:40:47,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:40:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:40:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:40:47,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-13 21:40:47,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 657 transitions, 5854 flow. Second operand has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 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) [2022-07-13 21:40:47,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:47,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-13 21:40:47,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:51,213 INFO L129 PetriNetUnfolder]: 1333/13356 cut-off events. [2022-07-13 21:40:51,213 INFO L130 PetriNetUnfolder]: For 35683/35699 co-relation queries the response was YES. [2022-07-13 21:40:51,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37996 conditions, 13356 events. 1333/13356 cut-off events. For 35683/35699 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 122032 event pairs, 377 based on Foata normal form. 64/12911 useless extension candidates. Maximal degree in co-relation 37219. Up to 762 conditions per place. [2022-07-13 21:40:51,450 INFO L132 encePairwiseOnDemand]: 165/172 looper letters, 256 selfloop transitions, 183 changer transitions 1/896 dead transitions. [2022-07-13 21:40:51,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 896 transitions, 8925 flow [2022-07-13 21:40:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 21:40:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 21:40:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3631 transitions. [2022-07-13 21:40:51,453 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8796027131782945 [2022-07-13 21:40:51,453 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3631 transitions. [2022-07-13 21:40:51,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3631 transitions. [2022-07-13 21:40:51,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:51,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3631 transitions. [2022-07-13 21:40:51,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.29166666666666) internal successors, (3631), 24 states have internal predecessors, (3631), 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) [2022-07-13 21:40:51,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 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) [2022-07-13 21:40:51,460 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 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) [2022-07-13 21:40:51,460 INFO L186 Difference]: Start difference. First operand has 612 places, 657 transitions, 5854 flow. Second operand 24 states and 3631 transitions. [2022-07-13 21:40:51,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 896 transitions, 8925 flow [2022-07-13 21:40:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 896 transitions, 8575 flow, removed 106 selfloop flow, removed 25 redundant places. [2022-07-13 21:40:51,634 INFO L242 Difference]: Finished difference. Result has 614 places, 761 transitions, 7174 flow [2022-07-13 21:40:51,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7174, PETRI_PLACES=614, PETRI_TRANSITIONS=761} [2022-07-13 21:40:51,636 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 457 predicate places. [2022-07-13 21:40:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 761 transitions, 7174 flow [2022-07-13 21:40:51,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 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) [2022-07-13 21:40:51,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:51,637 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] [2022-07-13 21:40:51,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:51,838 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 [2022-07-13 21:40:51,838 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:40:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash -726539357, now seen corresponding path program 1 times [2022-07-13 21:40:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:51,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449051955] [2022-07-13 21:40:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449051955] [2022-07-13 21:40:54,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449051955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701531589] [2022-07-13 21:40:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:54,387 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) [2022-07-13 21:40:54,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:40:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-13 21:40:54,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:55,255 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 [2022-07-13 21:40:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 21:40:56,120 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 [2022-07-13 21:40:57,645 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 [2022-07-13 21:40:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:57,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:42:00,339 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 21:42:00,340 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 [2022-07-13 21:42:00,346 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 21:42:00,346 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 [2022-07-13 21:42:00,356 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 [2022-07-13 21:42:00,371 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 21:42:00,371 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 [2022-07-13 21:42:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:42:01,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701531589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:42:01,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:42:01,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 34, 33] total 102 [2022-07-13 21:42:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951651065] [2022-07-13 21:42:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:42:01,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-13 21:42:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:42:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-13 21:42:01,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=9287, Unknown=42, NotChecked=0, Total=10302 [2022-07-13 21:42:01,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-07-13 21:42:01,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 761 transitions, 7174 flow. Second operand has 102 states, 102 states have (on average 86.02941176470588) internal successors, (8775), 102 states have internal predecessors, (8775), 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) [2022-07-13 21:42:01,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:42:01,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-07-13 21:42:01,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:11,834 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 89 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 21:43:45,101 WARN L233 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 108 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)