./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/popl20-bad-threaded-sum-2.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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:05:03,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:05:03,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:05:03,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:05:03,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:05:03,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:05:03,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:05:03,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:05:03,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:05:03,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:05:03,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:05:03,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:05:03,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:05:03,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:05:03,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:05:03,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:05:03,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:05:03,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:05:03,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:05:03,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:05:03,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:05:03,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:05:03,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:05:03,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:05:03,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:05:03,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:05:03,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:05:03,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:05:03,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:05:03,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:05:03,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:05:03,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:05:03,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:05:03,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:05:03,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:05:03,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:05:03,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:05:03,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:05:03,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:05:03,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:05:03,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:05:03,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:05:03,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:05:03,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:05:03,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:05:03,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:05:03,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:05:03,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:05:03,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:05:03,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:05:03,572 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:05:03,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:05:03,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:05:03,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:05:03,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:05:03,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:05:03,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:05:03,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:05:03,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:05:03,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:05:03,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:05:03,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:05:03,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:05:03,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:05:03,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:05:03,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2021-12-16 03:05:03,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:05:03,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:05:03,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:05:03,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:05:03,792 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:05:03,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-12-16 03:05:03,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90f975cc/5d6e1fc7c2b0403ca0d651f62c038378/FLAGce51249a0 [2021-12-16 03:05:04,226 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:05:04,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-12-16 03:05:04,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90f975cc/5d6e1fc7c2b0403ca0d651f62c038378/FLAGce51249a0 [2021-12-16 03:05:04,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90f975cc/5d6e1fc7c2b0403ca0d651f62c038378 [2021-12-16 03:05:04,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:05:04,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:05:04,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:05:04,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:05:04,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:05:04,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7ba49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04, skipping insertion in model container [2021-12-16 03:05:04,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:05:04,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:05:04,413 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/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-12-16 03:05:04,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:05:04,420 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:05:04,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-12-16 03:05:04,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:05:04,445 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:05:04,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04 WrapperNode [2021-12-16 03:05:04,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:05:04,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:05:04,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:05:04,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:05:04,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,467 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2021-12-16 03:05:04,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:05:04,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:05:04,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:05:04,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:05:04,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:05:04,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:05:04,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:05:04,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:05:04,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (1/1) ... [2021-12-16 03:05:04,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:05:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:04,511 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) [2021-12-16 03:05:04,528 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 [2021-12-16 03:05:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:05:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:05:04,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:05:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:05:04,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:05:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:05:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:05:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:05:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:05:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:05:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:05:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:05:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:05:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:05:04,538 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:05:04,604 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:05:04,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:05:04,803 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:05:04,843 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:05:04,843 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:05:04,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:05:04 BoogieIcfgContainer [2021-12-16 03:05:04,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:05:04,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:05:04,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:05:04,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:05:04,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:05:04" (1/3) ... [2021-12-16 03:05:04,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39850540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:05:04, skipping insertion in model container [2021-12-16 03:05:04,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:04" (2/3) ... [2021-12-16 03:05:04,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39850540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:05:04, skipping insertion in model container [2021-12-16 03:05:04,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:05:04" (3/3) ... [2021-12-16 03:05:04,864 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2021-12-16 03:05:04,868 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:05:04,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:05:04,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:05:04,874 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:05:04,915 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,917 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,917 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,919 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,919 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,919 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,919 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,919 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,921 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,921 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,924 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,924 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,929 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,931 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:04,933 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:05:04,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:05:04,975 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:05:04,976 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:05:04,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2021-12-16 03:05:05,011 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-12-16 03:05:05,012 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:05:05,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-16 03:05:05,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2021-12-16 03:05:05,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2021-12-16 03:05:05,031 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2021-12-16 03:05:05,031 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:05:05,032 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:05,032 INFO L254 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] [2021-12-16 03:05:05,033 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2021-12-16 03:05:05,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:05,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102395323] [2021-12-16 03:05:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:05,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:05,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102395323] [2021-12-16 03:05:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102395323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:05,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:05:05,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623974586] [2021-12-16 03:05:05,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:05,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:05:05,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:05:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:05:05,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2021-12-16 03:05:05,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 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) [2021-12-16 03:05:05,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:05,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2021-12-16 03:05:05,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:05,373 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2021-12-16 03:05:05,376 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2021-12-16 03:05:05,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2021-12-16 03:05:05,381 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2021-12-16 03:05:05,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2021-12-16 03:05:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:05:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:05:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-12-16 03:05:05,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2021-12-16 03:05:05,397 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-12-16 03:05:05,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-12-16 03:05:05,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:05,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-12-16 03:05:05,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 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) [2021-12-16 03:05:05,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2021-12-16 03:05:05,413 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2021-12-16 03:05:05,414 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2021-12-16 03:05:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2021-12-16 03:05:05,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:05:05,425 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2021-12-16 03:05:05,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2021-12-16 03:05:05,430 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2021-12-16 03:05:05,431 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2021-12-16 03:05:05,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 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) [2021-12-16 03:05:05,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:05,432 INFO L254 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] [2021-12-16 03:05:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:05:05,433 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2021-12-16 03:05:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659490294] [2021-12-16 03:05:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:05,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:05,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659490294] [2021-12-16 03:05:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659490294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:05,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:05,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:05:05,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285815264] [2021-12-16 03:05:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:05,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:05:05,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:05:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:05:05,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-12-16 03:05:05,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 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) [2021-12-16 03:05:05,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:05,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-12-16 03:05:05,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:05,855 INFO L129 PetriNetUnfolder]: 37/152 cut-off events. [2021-12-16 03:05:05,855 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-12-16 03:05:05,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 152 events. 37/152 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 383 event pairs, 7 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 245. Up to 69 conditions per place. [2021-12-16 03:05:05,858 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 30 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2021-12-16 03:05:05,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 243 flow [2021-12-16 03:05:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:05:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:05:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2021-12-16 03:05:05,864 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2021-12-16 03:05:05,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 362 transitions. [2021-12-16 03:05:05,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 362 transitions. [2021-12-16 03:05:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:05,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 362 transitions. [2021-12-16 03:05:05,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.333333333333336) internal successors, (362), 6 states have internal predecessors, (362), 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) [2021-12-16 03:05:05,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2021-12-16 03:05:05,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2021-12-16 03:05:05,869 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 6 states and 362 transitions. [2021-12-16 03:05:05,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 243 flow [2021-12-16 03:05:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:05:05,872 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 182 flow [2021-12-16 03:05:05,872 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2021-12-16 03:05:05,873 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2021-12-16 03:05:05,873 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 182 flow [2021-12-16 03:05:05,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 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) [2021-12-16 03:05:05,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:05,874 INFO L254 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] [2021-12-16 03:05:05,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:05:05,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1642363136, now seen corresponding path program 1 times [2021-12-16 03:05:05,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:05,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785650043] [2021-12-16 03:05:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:05,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:06,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785650043] [2021-12-16 03:05:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785650043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936889560] [2021-12-16 03:05:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:06,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:06,039 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) [2021-12-16 03:05:06,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:05:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:06,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:05:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:06,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:05:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:06,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936889560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:05:06,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:05:06,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-12-16 03:05:06,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652314770] [2021-12-16 03:05:06,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:05:06,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:05:06,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:05:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:05:06,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-12-16 03:05:06,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 182 flow. Second operand has 16 states, 16 states have (on average 56.75) internal successors, (908), 16 states have internal predecessors, (908), 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) [2021-12-16 03:05:06,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:06,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-12-16 03:05:06,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:07,108 INFO L129 PetriNetUnfolder]: 53/226 cut-off events. [2021-12-16 03:05:07,108 INFO L130 PetriNetUnfolder]: For 37/41 co-relation queries the response was YES. [2021-12-16 03:05:07,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 226 events. 53/226 cut-off events. For 37/41 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 695 event pairs, 6 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 419. Up to 38 conditions per place. [2021-12-16 03:05:07,111 INFO L132 encePairwiseOnDemand]: 76/88 looper letters, 44 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2021-12-16 03:05:07,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 106 transitions, 391 flow [2021-12-16 03:05:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:05:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:05:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 712 transitions. [2021-12-16 03:05:07,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2021-12-16 03:05:07,116 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 712 transitions. [2021-12-16 03:05:07,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 712 transitions. [2021-12-16 03:05:07,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:07,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 712 transitions. [2021-12-16 03:05:07,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 59.333333333333336) internal successors, (712), 12 states have internal predecessors, (712), 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) [2021-12-16 03:05:07,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 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) [2021-12-16 03:05:07,123 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 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) [2021-12-16 03:05:07,123 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 182 flow. Second operand 12 states and 712 transitions. [2021-12-16 03:05:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 106 transitions, 391 flow [2021-12-16 03:05:07,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 106 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:05:07,127 INFO L242 Difference]: Finished difference. Result has 93 places, 84 transitions, 266 flow [2021-12-16 03:05:07,128 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=266, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2021-12-16 03:05:07,129 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2021-12-16 03:05:07,129 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 266 flow [2021-12-16 03:05:07,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.75) internal successors, (908), 16 states have internal predecessors, (908), 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) [2021-12-16 03:05:07,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:07,130 INFO L254 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] [2021-12-16 03:05:07,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:05:07,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:07,351 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1558781198, now seen corresponding path program 1 times [2021-12-16 03:05:07,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426056566] [2021-12-16 03:05:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:07,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:07,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:07,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426056566] [2021-12-16 03:05:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426056566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:07,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088373238] [2021-12-16 03:05:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:07,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:07,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:07,657 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) [2021-12-16 03:05:07,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:05:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 03:05:07,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:08,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:05:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:09,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088373238] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:09,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:05:09,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13, 15] total 32 [2021-12-16 03:05:09,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995289583] [2021-12-16 03:05:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:09,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:05:09,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:05:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-12-16 03:05:09,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-16 03:05:09,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 266 flow. Second operand has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 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) [2021-12-16 03:05:09,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:09,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-16 03:05:09,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:11,660 INFO L129 PetriNetUnfolder]: 302/970 cut-off events. [2021-12-16 03:05:11,660 INFO L130 PetriNetUnfolder]: For 554/554 co-relation queries the response was YES. [2021-12-16 03:05:11,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2299 conditions, 970 events. 302/970 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6197 event pairs, 60 based on Foata normal form. 4/963 useless extension candidates. Maximal degree in co-relation 2289. Up to 134 conditions per place. [2021-12-16 03:05:11,666 INFO L132 encePairwiseOnDemand]: 72/88 looper letters, 126 selfloop transitions, 84 changer transitions 30/279 dead transitions. [2021-12-16 03:05:11,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 279 transitions, 1528 flow [2021-12-16 03:05:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 03:05:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-16 03:05:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2022 transitions. [2021-12-16 03:05:11,670 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.621007371007371 [2021-12-16 03:05:11,670 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2022 transitions. [2021-12-16 03:05:11,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2022 transitions. [2021-12-16 03:05:11,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:11,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2022 transitions. [2021-12-16 03:05:11,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 54.648648648648646) internal successors, (2022), 37 states have internal predecessors, (2022), 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) [2021-12-16 03:05:11,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 88.0) internal successors, (3344), 38 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:11,679 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 88.0) internal successors, (3344), 38 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:11,679 INFO L186 Difference]: Start difference. First operand has 93 places, 84 transitions, 266 flow. Second operand 37 states and 2022 transitions. [2021-12-16 03:05:11,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 279 transitions, 1528 flow [2021-12-16 03:05:11,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 279 transitions, 1522 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-16 03:05:11,698 INFO L242 Difference]: Finished difference. Result has 148 places, 166 transitions, 994 flow [2021-12-16 03:05:11,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=994, PETRI_PLACES=148, PETRI_TRANSITIONS=166} [2021-12-16 03:05:11,700 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 70 predicate places. [2021-12-16 03:05:11,700 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 166 transitions, 994 flow [2021-12-16 03:05:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 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) [2021-12-16 03:05:11,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:11,702 INFO L254 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] [2021-12-16 03:05:11,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:05:11,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 03:05:11,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -661229165, now seen corresponding path program 1 times [2021-12-16 03:05:11,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:11,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064721027] [2021-12-16 03:05:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:11,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:12,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064721027] [2021-12-16 03:05:12,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064721027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007682756] [2021-12-16 03:05:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:12,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:12,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:12,366 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) [2021-12-16 03:05:12,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:05:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 03:05:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:05:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007682756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:05:15,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:05:15,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2021-12-16 03:05:15,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666614775] [2021-12-16 03:05:15,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:05:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-16 03:05:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-16 03:05:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 03:05:15,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-12-16 03:05:15,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 166 transitions, 994 flow. Second operand has 36 states, 36 states have (on average 53.0) internal successors, (1908), 36 states have internal predecessors, (1908), 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) [2021-12-16 03:05:15,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:15,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-12-16 03:05:15,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:28,589 INFO L129 PetriNetUnfolder]: 520/1934 cut-off events. [2021-12-16 03:05:28,589 INFO L130 PetriNetUnfolder]: For 6516/6614 co-relation queries the response was YES. [2021-12-16 03:05:28,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6329 conditions, 1934 events. 520/1934 cut-off events. For 6516/6614 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16094 event pairs, 16 based on Foata normal form. 43/1969 useless extension candidates. Maximal degree in co-relation 6296. Up to 290 conditions per place. [2021-12-16 03:05:28,603 INFO L132 encePairwiseOnDemand]: 70/88 looper letters, 199 selfloop transitions, 194 changer transitions 136/581 dead transitions. [2021-12-16 03:05:28,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 581 transitions, 4934 flow [2021-12-16 03:05:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-16 03:05:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-12-16 03:05:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5154 transitions. [2021-12-16 03:05:28,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6230657640232108 [2021-12-16 03:05:28,612 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5154 transitions. [2021-12-16 03:05:28,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5154 transitions. [2021-12-16 03:05:28,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:28,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5154 transitions. [2021-12-16 03:05:28,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 54.829787234042556) internal successors, (5154), 94 states have internal predecessors, (5154), 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) [2021-12-16 03:05:28,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 88.0) internal successors, (8360), 95 states have internal predecessors, (8360), 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) [2021-12-16 03:05:28,650 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 88.0) internal successors, (8360), 95 states have internal predecessors, (8360), 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) [2021-12-16 03:05:28,650 INFO L186 Difference]: Start difference. First operand has 148 places, 166 transitions, 994 flow. Second operand 94 states and 5154 transitions. [2021-12-16 03:05:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 581 transitions, 4934 flow [2021-12-16 03:05:28,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 581 transitions, 4420 flow, removed 249 selfloop flow, removed 10 redundant places. [2021-12-16 03:05:28,694 INFO L242 Difference]: Finished difference. Result has 277 places, 327 transitions, 2873 flow [2021-12-16 03:05:28,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=2873, PETRI_PLACES=277, PETRI_TRANSITIONS=327} [2021-12-16 03:05:28,696 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 199 predicate places. [2021-12-16 03:05:28,697 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 327 transitions, 2873 flow [2021-12-16 03:05:28,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.0) internal successors, (1908), 36 states have internal predecessors, (1908), 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) [2021-12-16 03:05:28,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:28,698 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:05:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:05:28,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:28,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash 960111191, now seen corresponding path program 2 times [2021-12-16 03:05:28,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364545897] [2021-12-16 03:05:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:28,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:05:29,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364545897] [2021-12-16 03:05:29,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364545897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:29,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:29,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:05:29,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37883162] [2021-12-16 03:05:29,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:29,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:05:29,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:05:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:05:29,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-16 03:05:29,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 327 transitions, 2873 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 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) [2021-12-16 03:05:29,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:29,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-16 03:05:29,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:29,502 INFO L129 PetriNetUnfolder]: 819/2350 cut-off events. [2021-12-16 03:05:29,502 INFO L130 PetriNetUnfolder]: For 18223/18223 co-relation queries the response was YES. [2021-12-16 03:05:29,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10061 conditions, 2350 events. 819/2350 cut-off events. For 18223/18223 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18273 event pairs, 69 based on Foata normal form. 6/2337 useless extension candidates. Maximal degree in co-relation 9984. Up to 606 conditions per place. [2021-12-16 03:05:29,527 INFO L132 encePairwiseOnDemand]: 82/88 looper letters, 364 selfloop transitions, 139 changer transitions 0/555 dead transitions. [2021-12-16 03:05:29,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 555 transitions, 6094 flow [2021-12-16 03:05:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:05:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:05:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 507 transitions. [2021-12-16 03:05:29,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.823051948051948 [2021-12-16 03:05:29,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 507 transitions. [2021-12-16 03:05:29,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 507 transitions. [2021-12-16 03:05:29,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:29,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 507 transitions. [2021-12-16 03:05:29,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.42857142857143) internal successors, (507), 7 states have internal predecessors, (507), 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) [2021-12-16 03:05:29,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:29,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:29,531 INFO L186 Difference]: Start difference. First operand has 277 places, 327 transitions, 2873 flow. Second operand 7 states and 507 transitions. [2021-12-16 03:05:29,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 555 transitions, 6094 flow [2021-12-16 03:05:29,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 555 transitions, 5520 flow, removed 267 selfloop flow, removed 53 redundant places. [2021-12-16 03:05:29,683 INFO L242 Difference]: Finished difference. Result has 188 places, 402 transitions, 3786 flow [2021-12-16 03:05:29,684 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3786, PETRI_PLACES=188, PETRI_TRANSITIONS=402} [2021-12-16 03:05:29,684 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 110 predicate places. [2021-12-16 03:05:29,684 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 402 transitions, 3786 flow [2021-12-16 03:05:29,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 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) [2021-12-16 03:05:29,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:29,685 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:05:29,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:05:29,685 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1984417141, now seen corresponding path program 3 times [2021-12-16 03:05:29,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646154390] [2021-12-16 03:05:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:29,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:29,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646154390] [2021-12-16 03:05:29,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646154390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:29,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:05:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701430709] [2021-12-16 03:05:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:05:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:05:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:05:29,754 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-16 03:05:29,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 402 transitions, 3786 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 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) [2021-12-16 03:05:29,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:29,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-16 03:05:29,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:30,302 INFO L129 PetriNetUnfolder]: 1199/3097 cut-off events. [2021-12-16 03:05:30,303 INFO L130 PetriNetUnfolder]: For 20921/20921 co-relation queries the response was YES. [2021-12-16 03:05:30,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 3097 events. 1199/3097 cut-off events. For 20921/20921 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23821 event pairs, 31 based on Foata normal form. 42/3125 useless extension candidates. Maximal degree in co-relation 14118. Up to 634 conditions per place. [2021-12-16 03:05:30,335 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 637 selfloop transitions, 217 changer transitions 0/906 dead transitions. [2021-12-16 03:05:30,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 906 transitions, 10708 flow [2021-12-16 03:05:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:05:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:05:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2021-12-16 03:05:30,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2021-12-16 03:05:30,356 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2021-12-16 03:05:30,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2021-12-16 03:05:30,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:30,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2021-12-16 03:05:30,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 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) [2021-12-16 03:05:30,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:30,359 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:30,359 INFO L186 Difference]: Start difference. First operand has 188 places, 402 transitions, 3786 flow. Second operand 7 states and 496 transitions. [2021-12-16 03:05:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 906 transitions, 10708 flow [2021-12-16 03:05:30,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 906 transitions, 10550 flow, removed 40 selfloop flow, removed 2 redundant places. [2021-12-16 03:05:30,463 INFO L242 Difference]: Finished difference. Result has 194 places, 552 transitions, 6577 flow [2021-12-16 03:05:30,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=194, PETRI_TRANSITIONS=552} [2021-12-16 03:05:30,464 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 116 predicate places. [2021-12-16 03:05:30,464 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 552 transitions, 6577 flow [2021-12-16 03:05:30,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 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) [2021-12-16 03:05:30,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:30,465 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 03:05:30,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:05:30,465 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 864864068, now seen corresponding path program 2 times [2021-12-16 03:05:30,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:30,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113754744] [2021-12-16 03:05:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:30,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:30,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:30,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113754744] [2021-12-16 03:05:30,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113754744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:30,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797677144] [2021-12-16 03:05:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:05:30,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:30,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:30,961 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) [2021-12-16 03:05:30,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:05:31,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:05:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:05:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 03:05:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:05:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:33,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797677144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:05:33,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:05:33,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2021-12-16 03:05:33,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602897979] [2021-12-16 03:05:33,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:05:33,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 03:05:33,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 03:05:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 03:05:33,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-12-16 03:05:33,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 552 transitions, 6577 flow. Second operand has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 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) [2021-12-16 03:05:33,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:33,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-12-16 03:05:33,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:39,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 03:05:53,519 INFO L129 PetriNetUnfolder]: 1680/4767 cut-off events. [2021-12-16 03:05:53,519 INFO L130 PetriNetUnfolder]: For 33030/33070 co-relation queries the response was YES. [2021-12-16 03:05:53,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23347 conditions, 4767 events. 1680/4767 cut-off events. For 33030/33070 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 42711 event pairs, 15 based on Foata normal form. 35/4793 useless extension candidates. Maximal degree in co-relation 23305. Up to 1069 conditions per place. [2021-12-16 03:05:53,563 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 615 selfloop transitions, 474 changer transitions 70/1223 dead transitions. [2021-12-16 03:05:53,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1223 transitions, 16733 flow [2021-12-16 03:05:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-16 03:05:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-12-16 03:05:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5202 transitions. [2021-12-16 03:05:53,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222488038277512 [2021-12-16 03:05:53,568 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5202 transitions. [2021-12-16 03:05:53,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5202 transitions. [2021-12-16 03:05:53,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:53,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5202 transitions. [2021-12-16 03:05:53,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 54.757894736842104) internal successors, (5202), 95 states have internal predecessors, (5202), 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) [2021-12-16 03:05:53,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 88.0) internal successors, (8448), 96 states have internal predecessors, (8448), 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) [2021-12-16 03:05:53,585 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 88.0) internal successors, (8448), 96 states have internal predecessors, (8448), 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) [2021-12-16 03:05:53,585 INFO L186 Difference]: Start difference. First operand has 194 places, 552 transitions, 6577 flow. Second operand 95 states and 5202 transitions. [2021-12-16 03:05:53,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1223 transitions, 16733 flow [2021-12-16 03:05:53,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1223 transitions, 16615 flow, removed 59 selfloop flow, removed 0 redundant places. [2021-12-16 03:05:53,821 INFO L242 Difference]: Finished difference. Result has 334 places, 896 transitions, 13044 flow [2021-12-16 03:05:53,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=6551, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=13044, PETRI_PLACES=334, PETRI_TRANSITIONS=896} [2021-12-16 03:05:53,823 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 256 predicate places. [2021-12-16 03:05:53,823 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 896 transitions, 13044 flow [2021-12-16 03:05:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 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) [2021-12-16 03:05:53,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:53,825 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 03:05:53,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:05:54,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:54,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1215007212, now seen corresponding path program 3 times [2021-12-16 03:05:54,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:54,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657789936] [2021-12-16 03:05:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:54,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:55,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657789936] [2021-12-16 03:05:55,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657789936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170988725] [2021-12-16 03:05:55,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:05:55,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:55,138 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) [2021-12-16 03:05:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:05:55,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 03:05:55,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:05:55,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 03:05:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:56,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:00,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170988725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:00,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:00,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 41 [2021-12-16 03:06:00,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093580624] [2021-12-16 03:06:00,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:00,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 03:06:00,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 03:06:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 03:06:00,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-16 03:06:00,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 896 transitions, 13044 flow. Second operand has 41 states, 41 states have (on average 51.170731707317074) internal successors, (2098), 41 states have internal predecessors, (2098), 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) [2021-12-16 03:06:00,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:00,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-16 03:06:00,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:11,055 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 150 DAG size of output: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)