./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:02:19,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:02:19,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:02:19,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:02:19,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:02:19,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:02:19,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:02:19,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:02:19,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:02:19,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:02:19,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:02:19,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:02:19,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:02:19,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:02:19,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:02:19,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:02:19,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:02:19,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:02:19,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:02:19,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:02:19,393 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:02:19,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:02:19,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:02:19,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:02:19,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:02:19,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:02:19,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:02:19,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:02:19,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:02:19,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:02:19,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:02:19,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:02:19,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:02:19,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:02:19,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:02:19,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:02:19,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:02:19,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:02:19,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:02:19,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:02:19,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:02:19,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:02:19,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:02:19,462 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:02:19,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:02:19,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:02:19,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:02:19,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:02:19,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:02:19,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:02:19,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:02:19,465 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:02:19,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:02:19,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:02:19,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:02:19,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:02:19,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:02:19,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:02:19,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:02:19,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:02:19,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:02:19,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:02:19,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:02:19,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:02:19,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:02:19,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:02:19,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:02:19,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:02:19,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:02:19,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:02:19,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:02:19,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:02:19,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:02:19,470 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:02:19,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:02:19,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:02:19,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-07-21 09:02:19,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:02:19,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:02:19,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:02:19,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:02:19,816 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:02:19,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-07-21 09:02:19,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82ac1426b/8d286d50a37540b79ead79a4792a2ecf/FLAG2a53f5767 [2022-07-21 09:02:20,257 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:02:20,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-07-21 09:02:20,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82ac1426b/8d286d50a37540b79ead79a4792a2ecf/FLAG2a53f5767 [2022-07-21 09:02:20,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82ac1426b/8d286d50a37540b79ead79a4792a2ecf [2022-07-21 09:02:20,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:02:20,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:02:20,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:02:20,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:02:20,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:02:20,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d15b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20, skipping insertion in model container [2022-07-21 09:02:20,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:02:20,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:02:20,447 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/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-07-21 09:02:20,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:02:20,479 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:02:20,528 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/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-07-21 09:02:20,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:02:20,553 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:02:20,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20 WrapperNode [2022-07-21 09:02:20,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:02:20,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:02:20,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:02:20,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:02:20,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,624 INFO L137 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2022-07-21 09:02:20,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:02:20,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:02:20,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:02:20,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:02:20,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:02:20,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:02:20,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:02:20,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:02:20,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (1/1) ... [2022-07-21 09:02:20,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:02:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:20,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:02:20,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:02:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:02:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:02:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:02:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:02:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:02:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:02:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:02:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:02:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:02:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:02:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-21 09:02:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-21 09:02:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:02:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:02:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:02:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:02:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:02:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:02:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:02:20,766 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:02:20,932 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:02:20,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:02:21,413 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:02:21,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:02:21,638 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-21 09:02:21,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:21 BoogieIcfgContainer [2022-07-21 09:02:21,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:02:21,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:02:21,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:02:21,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:02:21,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:02:20" (1/3) ... [2022-07-21 09:02:21,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:21, skipping insertion in model container [2022-07-21 09:02:21,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:20" (2/3) ... [2022-07-21 09:02:21,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:21, skipping insertion in model container [2022-07-21 09:02:21,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:21" (3/3) ... [2022-07-21 09:02:21,650 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-07-21 09:02:21,655 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:02:21,683 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:02:21,683 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:02:21,683 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:02:21,758 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 09:02:21,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2022-07-21 09:02:21,874 INFO L129 PetriNetUnfolder]: 15/202 cut-off events. [2022-07-21 09:02:21,879 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:02:21,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2022-07-21 09:02:21,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2022-07-21 09:02:21,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 189 transitions, 402 flow [2022-07-21 09:02:21,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:02:21,916 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@38a4a97d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5abf8fcb [2022-07-21 09:02:21,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 09:02:21,961 INFO L129 PetriNetUnfolder]: 15/188 cut-off events. [2022-07-21 09:02:21,968 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:02:21,968 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:21,970 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:21,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash -276996244, now seen corresponding path program 1 times [2022-07-21 09:02:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:21,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53428824] [2022-07-21 09:02:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:21,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:22,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53428824] [2022-07-21 09:02:22,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53428824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:22,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:22,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:02:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243495427] [2022-07-21 09:02:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:02:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:02:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:02:22,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 206 [2022-07-21 09:02:22,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 189 transitions, 402 flow. Second operand has 2 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:22,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 206 [2022-07-21 09:02:22,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:22,445 INFO L129 PetriNetUnfolder]: 118/325 cut-off events. [2022-07-21 09:02:22,445 INFO L130 PetriNetUnfolder]: For 61/62 co-relation queries the response was YES. [2022-07-21 09:02:22,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 325 events. 118/325 cut-off events. For 61/62 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 586 event pairs, 51 based on Foata normal form. 72/379 useless extension candidates. Maximal degree in co-relation 351. Up to 163 conditions per place. [2022-07-21 09:02:22,451 INFO L132 encePairwiseOnDemand]: 196/206 looper letters, 16 selfloop transitions, 0 changer transitions 5/179 dead transitions. [2022-07-21 09:02:22,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 179 transitions, 414 flow [2022-07-21 09:02:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:02:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:02:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 384 transitions. [2022-07-21 09:02:22,471 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9320388349514563 [2022-07-21 09:02:22,472 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 384 transitions. [2022-07-21 09:02:22,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 384 transitions. [2022-07-21 09:02:22,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:22,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 384 transitions. [2022-07-21 09:02:22,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,490 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,492 INFO L186 Difference]: Start difference. First operand has 187 places, 189 transitions, 402 flow. Second operand 2 states and 384 transitions. [2022-07-21 09:02:22,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 179 transitions, 414 flow [2022-07-21 09:02:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 179 transitions, 398 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-21 09:02:22,500 INFO L242 Difference]: Finished difference. Result has 180 places, 174 transitions, 356 flow [2022-07-21 09:02:22,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=356, PETRI_PLACES=180, PETRI_TRANSITIONS=174} [2022-07-21 09:02:22,505 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -7 predicate places. [2022-07-21 09:02:22,505 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 174 transitions, 356 flow [2022-07-21 09:02:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,506 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:22,507 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:02:22,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 965277343, now seen corresponding path program 1 times [2022-07-21 09:02:22,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900223565] [2022-07-21 09:02:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:22,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:22,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900223565] [2022-07-21 09:02:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900223565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:22,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:22,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:02:22,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228533832] [2022-07-21 09:02:22,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:02:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:02:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:02:22,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 206 [2022-07-21 09:02:22,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 174 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 148.57142857142858) internal successors, (1040), 7 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:22,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 206 [2022-07-21 09:02:22,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:23,172 INFO L129 PetriNetUnfolder]: 133/378 cut-off events. [2022-07-21 09:02:23,172 INFO L130 PetriNetUnfolder]: For 19/20 co-relation queries the response was YES. [2022-07-21 09:02:23,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 378 events. 133/378 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 821 event pairs, 8 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 615. Up to 205 conditions per place. [2022-07-21 09:02:23,179 INFO L132 encePairwiseOnDemand]: 196/206 looper letters, 50 selfloop transitions, 7 changer transitions 4/188 dead transitions. [2022-07-21 09:02:23,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 188 transitions, 513 flow [2022-07-21 09:02:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:02:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:02:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1063 transitions. [2022-07-21 09:02:23,183 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7371705963938974 [2022-07-21 09:02:23,184 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1063 transitions. [2022-07-21 09:02:23,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1063 transitions. [2022-07-21 09:02:23,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:23,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1063 transitions. [2022-07-21 09:02:23,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.85714285714286) internal successors, (1063), 7 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,194 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,194 INFO L186 Difference]: Start difference. First operand has 180 places, 174 transitions, 356 flow. Second operand 7 states and 1063 transitions. [2022-07-21 09:02:23,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 188 transitions, 513 flow [2022-07-21 09:02:23,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 188 transitions, 513 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:02:23,203 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 397 flow [2022-07-21 09:02:23,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-07-21 09:02:23,204 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -3 predicate places. [2022-07-21 09:02:23,204 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 397 flow [2022-07-21 09:02:23,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.57142857142858) internal successors, (1040), 7 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:23,206 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:23,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:02:23,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1117153979, now seen corresponding path program 1 times [2022-07-21 09:02:23,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:23,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082739243] [2022-07-21 09:02:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:23,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082739243] [2022-07-21 09:02:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082739243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:23,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:02:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316568983] [2022-07-21 09:02:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:02:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:02:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:02:23,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 206 [2022-07-21 09:02:23,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:23,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 206 [2022-07-21 09:02:23,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:23,720 INFO L129 PetriNetUnfolder]: 346/867 cut-off events. [2022-07-21 09:02:23,720 INFO L130 PetriNetUnfolder]: For 165/167 co-relation queries the response was YES. [2022-07-21 09:02:23,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 867 events. 346/867 cut-off events. For 165/167 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3634 event pairs, 49 based on Foata normal form. 1/822 useless extension candidates. Maximal degree in co-relation 1638. Up to 208 conditions per place. [2022-07-21 09:02:23,730 INFO L132 encePairwiseOnDemand]: 196/206 looper letters, 59 selfloop transitions, 16 changer transitions 4/213 dead transitions. [2022-07-21 09:02:23,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 213 transitions, 663 flow [2022-07-21 09:02:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:02:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:02:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1276 transitions. [2022-07-21 09:02:23,734 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7742718446601942 [2022-07-21 09:02:23,734 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1276 transitions. [2022-07-21 09:02:23,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1276 transitions. [2022-07-21 09:02:23,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:23,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1276 transitions. [2022-07-21 09:02:23,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,743 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 397 flow. Second operand 8 states and 1276 transitions. [2022-07-21 09:02:23,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 213 transitions, 663 flow [2022-07-21 09:02:23,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 213 transitions, 644 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:23,762 INFO L242 Difference]: Finished difference. Result has 191 places, 187 transitions, 500 flow [2022-07-21 09:02:23,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=500, PETRI_PLACES=191, PETRI_TRANSITIONS=187} [2022-07-21 09:02:23,765 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 4 predicate places. [2022-07-21 09:02:23,765 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 187 transitions, 500 flow [2022-07-21 09:02:23,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,766 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:23,767 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:02:23,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1719569361, now seen corresponding path program 1 times [2022-07-21 09:02:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005631335] [2022-07-21 09:02:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:23,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005631335] [2022-07-21 09:02:23,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005631335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:23,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:23,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:02:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812487710] [2022-07-21 09:02:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:23,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:02:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:02:23,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:02:23,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 206 [2022-07-21 09:02:23,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 187 transitions, 500 flow. Second operand has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:23,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:23,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 206 [2022-07-21 09:02:23,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:24,306 INFO L129 PetriNetUnfolder]: 559/1328 cut-off events. [2022-07-21 09:02:24,307 INFO L130 PetriNetUnfolder]: For 933/934 co-relation queries the response was YES. [2022-07-21 09:02:24,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2984 conditions, 1328 events. 559/1328 cut-off events. For 933/934 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6837 event pairs, 59 based on Foata normal form. 1/1262 useless extension candidates. Maximal degree in co-relation 2973. Up to 504 conditions per place. [2022-07-21 09:02:24,324 INFO L132 encePairwiseOnDemand]: 196/206 looper letters, 63 selfloop transitions, 19 changer transitions 6/222 dead transitions. [2022-07-21 09:02:24,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 222 transitions, 814 flow [2022-07-21 09:02:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:02:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:02:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1276 transitions. [2022-07-21 09:02:24,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7742718446601942 [2022-07-21 09:02:24,329 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1276 transitions. [2022-07-21 09:02:24,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1276 transitions. [2022-07-21 09:02:24,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:24,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1276 transitions. [2022-07-21 09:02:24,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,336 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,336 INFO L186 Difference]: Start difference. First operand has 191 places, 187 transitions, 500 flow. Second operand 8 states and 1276 transitions. [2022-07-21 09:02:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 222 transitions, 814 flow [2022-07-21 09:02:24,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 222 transitions, 810 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:02:24,344 INFO L242 Difference]: Finished difference. Result has 201 places, 196 transitions, 648 flow [2022-07-21 09:02:24,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=648, PETRI_PLACES=201, PETRI_TRANSITIONS=196} [2022-07-21 09:02:24,345 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 14 predicate places. [2022-07-21 09:02:24,345 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 196 transitions, 648 flow [2022-07-21 09:02:24,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,346 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:24,346 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:24,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:02:24,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -94838817, now seen corresponding path program 1 times [2022-07-21 09:02:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:24,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305165234] [2022-07-21 09:02:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305165234] [2022-07-21 09:02:24,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305165234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:24,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:24,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:02:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804795575] [2022-07-21 09:02:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:02:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:02:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:02:24,595 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 206 [2022-07-21 09:02:24,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 196 transitions, 648 flow. Second operand has 9 states, 9 states have (on average 139.33333333333334) internal successors, (1254), 9 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:24,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 206 [2022-07-21 09:02:24,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:25,122 INFO L129 PetriNetUnfolder]: 591/1475 cut-off events. [2022-07-21 09:02:25,123 INFO L130 PetriNetUnfolder]: For 2096/2097 co-relation queries the response was YES. [2022-07-21 09:02:25,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 1475 events. 591/1475 cut-off events. For 2096/2097 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7795 event pairs, 149 based on Foata normal form. 24/1415 useless extension candidates. Maximal degree in co-relation 3654. Up to 797 conditions per place. [2022-07-21 09:02:25,172 INFO L132 encePairwiseOnDemand]: 196/206 looper letters, 78 selfloop transitions, 4 changer transitions 19/219 dead transitions. [2022-07-21 09:02:25,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 219 transitions, 962 flow [2022-07-21 09:02:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:02:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:02:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1285 transitions. [2022-07-21 09:02:25,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6930960086299892 [2022-07-21 09:02:25,176 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1285 transitions. [2022-07-21 09:02:25,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1285 transitions. [2022-07-21 09:02:25,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:25,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1285 transitions. [2022-07-21 09:02:25,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.77777777777777) internal successors, (1285), 9 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:25,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:25,184 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:25,184 INFO L186 Difference]: Start difference. First operand has 201 places, 196 transitions, 648 flow. Second operand 9 states and 1285 transitions. [2022-07-21 09:02:25,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 219 transitions, 962 flow [2022-07-21 09:02:25,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 219 transitions, 954 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-21 09:02:25,197 INFO L242 Difference]: Finished difference. Result has 210 places, 197 transitions, 670 flow [2022-07-21 09:02:25,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=210, PETRI_TRANSITIONS=197} [2022-07-21 09:02:25,200 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 23 predicate places. [2022-07-21 09:02:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 197 transitions, 670 flow [2022-07-21 09:02:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.33333333333334) internal successors, (1254), 9 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:25,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:25,202 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:02:25,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -692900602, now seen corresponding path program 1 times [2022-07-21 09:02:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616353156] [2022-07-21 09:02:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616353156] [2022-07-21 09:02:25,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616353156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136489036] [2022-07-21 09:02:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:25,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:25,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:25,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:02:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:02:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:25,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136489036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:26,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:26,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-21 09:02:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186765664] [2022-07-21 09:02:26,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:02:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:02:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:02:26,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 206 [2022-07-21 09:02:26,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 197 transitions, 670 flow. Second operand has 25 states, 25 states have (on average 137.04) internal successors, (3426), 25 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:26,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:26,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 206 [2022-07-21 09:02:26,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:26,986 INFO L129 PetriNetUnfolder]: 559/1391 cut-off events. [2022-07-21 09:02:26,986 INFO L130 PetriNetUnfolder]: For 2059/2060 co-relation queries the response was YES. [2022-07-21 09:02:26,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 1391 events. 559/1391 cut-off events. For 2059/2060 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6989 event pairs, 146 based on Foata normal form. 16/1322 useless extension candidates. Maximal degree in co-relation 3464. Up to 783 conditions per place. [2022-07-21 09:02:27,003 INFO L132 encePairwiseOnDemand]: 186/206 looper letters, 68 selfloop transitions, 20 changer transitions 13/218 dead transitions. [2022-07-21 09:02:27,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 218 transitions, 958 flow [2022-07-21 09:02:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:02:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:02:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2344 transitions. [2022-07-21 09:02:27,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6693318103940605 [2022-07-21 09:02:27,008 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2344 transitions. [2022-07-21 09:02:27,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2344 transitions. [2022-07-21 09:02:27,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:27,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2344 transitions. [2022-07-21 09:02:27,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.88235294117646) internal successors, (2344), 17 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,020 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,020 INFO L186 Difference]: Start difference. First operand has 210 places, 197 transitions, 670 flow. Second operand 17 states and 2344 transitions. [2022-07-21 09:02:27,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 218 transitions, 958 flow [2022-07-21 09:02:27,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 218 transitions, 932 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-21 09:02:27,029 INFO L242 Difference]: Finished difference. Result has 223 places, 201 transitions, 736 flow [2022-07-21 09:02:27,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=736, PETRI_PLACES=223, PETRI_TRANSITIONS=201} [2022-07-21 09:02:27,030 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 36 predicate places. [2022-07-21 09:02:27,030 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 201 transitions, 736 flow [2022-07-21 09:02:27,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 137.04) internal successors, (3426), 25 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:27,032 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:27,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 09:02:27,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -773787099, now seen corresponding path program 2 times [2022-07-21 09:02:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21128015] [2022-07-21 09:02:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:27,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:02:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21128015] [2022-07-21 09:02:27,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21128015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779530044] [2022-07-21 09:02:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:02:27,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:27,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:27,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:27,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:02:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:02:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 09:02:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:28,665 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 15 treesize of output 11 [2022-07-21 09:02:29,363 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 6 treesize of output 5 [2022-07-21 09:02:29,505 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 6 treesize of output 5 [2022-07-21 09:02:29,644 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 6 treesize of output 5 [2022-07-21 09:02:29,772 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 6 treesize of output 5 [2022-07-21 09:02:30,120 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:02:30,120 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 28 treesize of output 15 [2022-07-21 09:02:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:02:31,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779530044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:31,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:31,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 11] total 51 [2022-07-21 09:02:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594275601] [2022-07-21 09:02:31,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 09:02:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 09:02:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 09:02:31,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 206 [2022-07-21 09:02:31,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 201 transitions, 736 flow. Second operand has 51 states, 51 states have (on average 100.74509803921569) internal successors, (5138), 51 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:31,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:31,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 206 [2022-07-21 09:02:31,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:41,682 INFO L129 PetriNetUnfolder]: 5365/11132 cut-off events. [2022-07-21 09:02:41,683 INFO L130 PetriNetUnfolder]: For 15208/15211 co-relation queries the response was YES. [2022-07-21 09:02:41,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28217 conditions, 11132 events. 5365/11132 cut-off events. For 15208/15211 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 90783 event pairs, 123 based on Foata normal form. 79/10637 useless extension candidates. Maximal degree in co-relation 28193. Up to 2891 conditions per place. [2022-07-21 09:02:41,816 INFO L132 encePairwiseOnDemand]: 170/206 looper letters, 383 selfloop transitions, 328 changer transitions 71/871 dead transitions. [2022-07-21 09:02:41,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 871 transitions, 5427 flow [2022-07-21 09:02:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 09:02:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-07-21 09:02:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 8627 transitions. [2022-07-21 09:02:41,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5107151314231589 [2022-07-21 09:02:41,842 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 8627 transitions. [2022-07-21 09:02:41,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 8627 transitions. [2022-07-21 09:02:41,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:41,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 8627 transitions. [2022-07-21 09:02:41,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 105.20731707317073) internal successors, (8627), 82 states have internal predecessors, (8627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:41,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 206.0) internal successors, (17098), 83 states have internal predecessors, (17098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:41,911 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 206.0) internal successors, (17098), 83 states have internal predecessors, (17098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:41,911 INFO L186 Difference]: Start difference. First operand has 223 places, 201 transitions, 736 flow. Second operand 82 states and 8627 transitions. [2022-07-21 09:02:41,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 871 transitions, 5427 flow [2022-07-21 09:02:41,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 871 transitions, 5337 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-07-21 09:02:41,939 INFO L242 Difference]: Finished difference. Result has 305 places, 535 transitions, 3792 flow [2022-07-21 09:02:41,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=3792, PETRI_PLACES=305, PETRI_TRANSITIONS=535} [2022-07-21 09:02:41,941 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 118 predicate places. [2022-07-21 09:02:41,941 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 535 transitions, 3792 flow [2022-07-21 09:02:41,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 100.74509803921569) internal successors, (5138), 51 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:41,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:41,943 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:41,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:42,159 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,SelfDestructingSolverStorable6 [2022-07-21 09:02:42,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:02:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -778488841, now seen corresponding path program 1 times [2022-07-21 09:02:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319959846] [2022-07-21 09:02:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319959846] [2022-07-21 09:02:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319959846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731194236] [2022-07-21 09:02:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:43,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:43,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:43,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:43,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:02:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 09:02:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:43,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:02:43,590 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:02:43,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:02:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:02:44,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-07-21 09:02:45,078 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 23 treesize of output 25 [2022-07-21 09:02:45,197 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:02:45,197 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 28 treesize of output 15 [2022-07-21 09:02:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:45,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:46,137 INFO L356 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2022-07-21 09:02:46,138 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 258 treesize of output 172 [2022-07-21 09:02:46,143 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 168 treesize of output 154 [2022-07-21 09:02:46,147 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 154 treesize of output 126 [2022-07-21 09:02:47,913 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 10 treesize of output 8 [2022-07-21 09:02:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:47,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731194236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:47,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:47,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 76 [2022-07-21 09:02:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138124188] [2022-07-21 09:02:47,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:47,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-21 09:02:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-21 09:02:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=5251, Unknown=5, NotChecked=0, Total=5700 [2022-07-21 09:02:47,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 206 [2022-07-21 09:02:47,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 535 transitions, 3792 flow. Second operand has 76 states, 76 states have (on average 98.97368421052632) internal successors, (7522), 76 states have internal predecessors, (7522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:47,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:47,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 206 [2022-07-21 09:02:47,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:12,265 INFO L129 PetriNetUnfolder]: 14042/29572 cut-off events. [2022-07-21 09:03:12,265 INFO L130 PetriNetUnfolder]: For 83702/84042 co-relation queries the response was YES. [2022-07-21 09:03:12,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96280 conditions, 29572 events. 14042/29572 cut-off events. For 83702/84042 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 292223 event pairs, 1550 based on Foata normal form. 296/28195 useless extension candidates. Maximal degree in co-relation 96245. Up to 7873 conditions per place. [2022-07-21 09:03:12,745 INFO L132 encePairwiseOnDemand]: 162/206 looper letters, 1052 selfloop transitions, 566 changer transitions 133/1837 dead transitions. [2022-07-21 09:03:12,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1837 transitions, 16450 flow [2022-07-21 09:03:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-07-21 09:03:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2022-07-21 09:03:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 13171 transitions. [2022-07-21 09:03:12,771 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5034401039675865 [2022-07-21 09:03:12,771 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 13171 transitions. [2022-07-21 09:03:12,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 13171 transitions. [2022-07-21 09:03:12,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:12,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 13171 transitions. [2022-07-21 09:03:12,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 103.70866141732283) internal successors, (13171), 127 states have internal predecessors, (13171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:12,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 206.0) internal successors, (26368), 128 states have internal predecessors, (26368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:12,852 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 206.0) internal successors, (26368), 128 states have internal predecessors, (26368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:12,853 INFO L186 Difference]: Start difference. First operand has 305 places, 535 transitions, 3792 flow. Second operand 127 states and 13171 transitions. [2022-07-21 09:03:12,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1837 transitions, 16450 flow [2022-07-21 09:03:13,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1837 transitions, 15398 flow, removed 474 selfloop flow, removed 16 redundant places. [2022-07-21 09:03:13,082 INFO L242 Difference]: Finished difference. Result has 441 places, 1069 transitions, 10101 flow [2022-07-21 09:03:13,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=10101, PETRI_PLACES=441, PETRI_TRANSITIONS=1069} [2022-07-21 09:03:13,085 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 254 predicate places. [2022-07-21 09:03:13,086 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1069 transitions, 10101 flow [2022-07-21 09:03:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 98.97368421052632) internal successors, (7522), 76 states have internal predecessors, (7522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:13,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:13,088 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:13,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:13,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash 451262023, now seen corresponding path program 2 times [2022-07-21 09:03:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:13,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384583990] [2022-07-21 09:03:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:03:14,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384583990] [2022-07-21 09:03:14,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384583990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466885733] [2022-07-21 09:03:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:03:14,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:14,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:14,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:14,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:03:14,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:14,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 09:03:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:14,777 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 13 treesize of output 9 [2022-07-21 09:03:15,206 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 6 treesize of output 5 [2022-07-21 09:03:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:15,438 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 22 treesize of output 24 [2022-07-21 09:03:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:15,541 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 22 treesize of output 24 [2022-07-21 09:03:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:15,629 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 22 treesize of output 24 [2022-07-21 09:03:15,699 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:03:15,700 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 27 treesize of output 14 [2022-07-21 09:03:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:16,800 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_274 (Array Int Int)) (v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_274)) (.cse1 (+ c_~x~0.offset 4))) (= (select (select (store (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~x~0.base) .cse1) (select (select .cse0 c_~x~0.base) .cse1)))) is different from false [2022-07-21 09:03:16,814 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_274 (Array Int Int)) (v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_274)) (.cse1 (+ |c_ULTIMATE.start_main_#t~ret26#1.offset| 4))) (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret26#1.base|) .cse1) (select (select (store (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) |c_ULTIMATE.start_main_#t~ret26#1.base|) .cse1)))) is different from false [2022-07-21 09:03:16,823 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_274 (Array Int Int)) (v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_274)) (.cse1 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1) (select (select (store (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1)))) is different from false [2022-07-21 09:03:16,830 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_274 (Array Int Int)) (v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_274)) (.cse1 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (= (select (select (store (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)))) is different from false [2022-07-21 09:03:16,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:03:16,854 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 54 treesize of output 43 [2022-07-21 09:03:16,858 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 2710 treesize of output 2326 [2022-07-21 09:03:16,966 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 2290 treesize of output 2034 [2022-07-21 09:03:16,974 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 2034 treesize of output 1906 [2022-07-21 09:03:16,986 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 1906 treesize of output 1650 [2022-07-21 09:03:16,994 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 1650 treesize of output 1586 [2022-07-21 09:03:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2022-07-21 09:03:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466885733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:18,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:18,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 24] total 63 [2022-07-21 09:03:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393501863] [2022-07-21 09:03:18,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:18,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 09:03:18,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 09:03:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3105, Unknown=31, NotChecked=468, Total=3906 [2022-07-21 09:03:18,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 206 [2022-07-21 09:03:18,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1069 transitions, 10101 flow. Second operand has 63 states, 63 states have (on average 104.34920634920636) internal successors, (6574), 63 states have internal predecessors, (6574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:18,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:18,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 206 [2022-07-21 09:03:18,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:38,543 INFO L129 PetriNetUnfolder]: 25278/51848 cut-off events. [2022-07-21 09:03:38,543 INFO L130 PetriNetUnfolder]: For 309662/311006 co-relation queries the response was YES. [2022-07-21 09:03:39,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214744 conditions, 51848 events. 25278/51848 cut-off events. For 309662/311006 co-relation queries the response was YES. Maximal size of possible extension queue 2333. Compared 546200 event pairs, 2276 based on Foata normal form. 407/49357 useless extension candidates. Maximal degree in co-relation 214674. Up to 18641 conditions per place. [2022-07-21 09:03:39,936 INFO L132 encePairwiseOnDemand]: 169/206 looper letters, 1125 selfloop transitions, 998 changer transitions 39/2255 dead transitions. [2022-07-21 09:03:39,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 2255 transitions, 27014 flow [2022-07-21 09:03:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:03:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:03:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5197 transitions. [2022-07-21 09:03:39,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5367692625490601 [2022-07-21 09:03:39,943 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5197 transitions. [2022-07-21 09:03:39,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5197 transitions. [2022-07-21 09:03:39,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:39,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5197 transitions. [2022-07-21 09:03:39,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 110.57446808510639) internal successors, (5197), 47 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:39,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:39,961 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:39,961 INFO L186 Difference]: Start difference. First operand has 441 places, 1069 transitions, 10101 flow. Second operand 47 states and 5197 transitions. [2022-07-21 09:03:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 2255 transitions, 27014 flow [2022-07-21 09:03:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2255 transitions, 25226 flow, removed 865 selfloop flow, removed 28 redundant places. [2022-07-21 09:03:42,114 INFO L242 Difference]: Finished difference. Result has 458 places, 1817 transitions, 20984 flow [2022-07-21 09:03:42,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9033, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=20984, PETRI_PLACES=458, PETRI_TRANSITIONS=1817} [2022-07-21 09:03:42,116 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 271 predicate places. [2022-07-21 09:03:42,116 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1817 transitions, 20984 flow [2022-07-21 09:03:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 104.34920634920636) internal successors, (6574), 63 states have internal predecessors, (6574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:42,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:42,118 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:42,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:42,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:42,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:03:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash 442380453, now seen corresponding path program 3 times [2022-07-21 09:03:42,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:42,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771531928] [2022-07-21 09:03:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:03:42,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771531928] [2022-07-21 09:03:42,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771531928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115103733] [2022-07-21 09:03:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:03:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:42,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:42,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:03:42,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:03:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 09:03:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:43,783 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 18 treesize of output 20 [2022-07-21 09:03:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:43,916 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 18 treesize of output 20 [2022-07-21 09:03:44,006 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:03:44,006 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 23 treesize of output 10 [2022-07-21 09:03:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:44,773 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-21 09:03:44,774 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 120 treesize of output 83 [2022-07-21 09:03:44,780 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 42 treesize of output 35 [2022-07-21 09:03:44,783 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 72 treesize of output 58 [2022-07-21 09:03:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:45,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115103733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:45,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:45,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 65 [2022-07-21 09:03:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441972605] [2022-07-21 09:03:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 09:03:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 09:03:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3787, Unknown=3, NotChecked=0, Total=4160 [2022-07-21 09:03:45,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 206 [2022-07-21 09:03:45,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1817 transitions, 20984 flow. Second operand has 65 states, 65 states have (on average 104.18461538461538) internal successors, (6772), 65 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:45,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:45,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 206 [2022-07-21 09:03:45,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:08,842 INFO L129 PetriNetUnfolder]: 26546/55077 cut-off events. [2022-07-21 09:04:08,843 INFO L130 PetriNetUnfolder]: For 485674/487833 co-relation queries the response was YES. [2022-07-21 09:04:10,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260054 conditions, 55077 events. 26546/55077 cut-off events. For 485674/487833 co-relation queries the response was YES. Maximal size of possible extension queue 2499. Compared 592360 event pairs, 3740 based on Foata normal form. 412/52402 useless extension candidates. Maximal degree in co-relation 259964. Up to 18659 conditions per place. [2022-07-21 09:04:10,676 INFO L132 encePairwiseOnDemand]: 167/206 looper letters, 1618 selfloop transitions, 633 changer transitions 73/2413 dead transitions. [2022-07-21 09:04:10,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2413 transitions, 33121 flow [2022-07-21 09:04:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-21 09:04:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-21 09:04:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 8435 transitions. [2022-07-21 09:04:10,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5249564351506099 [2022-07-21 09:04:10,684 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 8435 transitions. [2022-07-21 09:04:10,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 8435 transitions. [2022-07-21 09:04:10,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:10,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 8435 transitions. [2022-07-21 09:04:10,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 108.14102564102564) internal successors, (8435), 78 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:10,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 206.0) internal successors, (16274), 79 states have internal predecessors, (16274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:10,711 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 206.0) internal successors, (16274), 79 states have internal predecessors, (16274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:10,711 INFO L186 Difference]: Start difference. First operand has 458 places, 1817 transitions, 20984 flow. Second operand 78 states and 8435 transitions. [2022-07-21 09:04:10,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2413 transitions, 33121 flow [2022-07-21 09:04:17,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 2413 transitions, 31347 flow, removed 858 selfloop flow, removed 21 redundant places. [2022-07-21 09:04:17,631 INFO L242 Difference]: Finished difference. Result has 531 places, 2124 transitions, 25156 flow [2022-07-21 09:04:17,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=19453, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=25156, PETRI_PLACES=531, PETRI_TRANSITIONS=2124} [2022-07-21 09:04:17,633 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 344 predicate places. [2022-07-21 09:04:17,633 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2124 transitions, 25156 flow [2022-07-21 09:04:17,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 104.18461538461538) internal successors, (6772), 65 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:17,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:17,635 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:17,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 09:04:17,843 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,SelfDestructingSolverStorable9 [2022-07-21 09:04:17,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:04:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2123914123, now seen corresponding path program 4 times [2022-07-21 09:04:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755888106] [2022-07-21 09:04:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:18,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:18,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755888106] [2022-07-21 09:04:18,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755888106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:18,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743192115] [2022-07-21 09:04:18,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:04:18,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:18,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:18,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:04:18,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:04:18,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 09:04:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:04:19,820 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 18 treesize of output 20 [2022-07-21 09:04:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:04:19,929 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 18 treesize of output 20 [2022-07-21 09:04:20,010 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:04:20,011 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 23 treesize of output 10 [2022-07-21 09:04:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:20,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:20,868 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 116 treesize of output 76 [2022-07-21 09:04:20,871 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 76 treesize of output 64 [2022-07-21 09:04:20,875 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 34 treesize of output 28 [2022-07-21 09:04:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:22,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743192115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:22,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:22,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 28] total 72 [2022-07-21 09:04:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368669270] [2022-07-21 09:04:22,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-21 09:04:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-21 09:04:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=4732, Unknown=3, NotChecked=0, Total=5112 [2022-07-21 09:04:22,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 206 [2022-07-21 09:04:22,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2124 transitions, 25156 flow. Second operand has 72 states, 72 states have (on average 102.15277777777777) internal successors, (7355), 72 states have internal predecessors, (7355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:22,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:22,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 206 [2022-07-21 09:04:22,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand