./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.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-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:09:22,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:09:22,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:09:22,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:09:22,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:09:22,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:09:22,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:09:22,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:09:22,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:09:22,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:09:22,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:09:22,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:09:22,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:09:22,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:09:22,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:09:22,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:09:22,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:09:22,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:09:22,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:09:22,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:09:22,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:09:22,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:09:22,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:09:22,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:09:22,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:09:22,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:09:22,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:09:22,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:09:22,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:09:22,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:09:22,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:09:22,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:09:22,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:09:22,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:09:22,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:09:22,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:09:22,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:09:22,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:09:22,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:09:22,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:09:22,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:09:22,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:09:22,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:09:22,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:09:22,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:09:22,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:09:22,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:09:22,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:09:22,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:09:22,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:09:22,637 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:09:22,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:09:22,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:09:22,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:09:22,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:09:22,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:09:22,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:09:22,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:09:22,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:09:22,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:09:22,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:22,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:09:22,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:09:22,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:09:22,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:09:22,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:09:22,641 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:09:22,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:09:22,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:09:22,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:09:22,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2021-12-16 03:09:22,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:09:22,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:09:22,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:09:22,874 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:09:22,874 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:09:22,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-12-16 03:09:22,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace7be426/4635a8f09d7441f5a936c843dc58f523/FLAG4130721bb [2021-12-16 03:09:23,296 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:09:23,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-12-16 03:09:23,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace7be426/4635a8f09d7441f5a936c843dc58f523/FLAG4130721bb [2021-12-16 03:09:23,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace7be426/4635a8f09d7441f5a936c843dc58f523 [2021-12-16 03:09:23,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:09:23,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:09:23,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:23,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:09:23,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:09:23,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b26c7ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23, skipping insertion in model container [2021-12-16 03:09:23,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:09:23,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:09:23,519 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-two-queue.wvr.c[2987,3000] [2021-12-16 03:09:23,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:23,536 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:09:23,565 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-two-queue.wvr.c[2987,3000] [2021-12-16 03:09:23,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:09:23,581 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:09:23,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23 WrapperNode [2021-12-16 03:09:23,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:09:23,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:23,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:09:23,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:09:23,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,624 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2021-12-16 03:09:23,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:09:23,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:09:23,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:09:23,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:09:23,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:09:23,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:09:23,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:09:23,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:09:23,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (1/1) ... [2021-12-16 03:09:23,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:09:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:23,691 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 03:09:23,709 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 03:09:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:09:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:09:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:09:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:09:23,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:09:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:09:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:09:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:09:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:09:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:09:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:09:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:09:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:09:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:09:23,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:09:23,722 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 03:09:23,809 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:09:23,828 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:09:24,014 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:09:24,115 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:09:24,116 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 03:09:24,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:24 BoogieIcfgContainer [2021-12-16 03:09:24,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:09:24,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:09:24,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:09:24,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:09:24,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:09:23" (1/3) ... [2021-12-16 03:09:24,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1181e6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:24, skipping insertion in model container [2021-12-16 03:09:24,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:09:23" (2/3) ... [2021-12-16 03:09:24,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1181e6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:09:24, skipping insertion in model container [2021-12-16 03:09:24,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:09:24" (3/3) ... [2021-12-16 03:09:24,139 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2021-12-16 03:09:24,142 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:09:24,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:09:24,143 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:09:24,143 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:09:24,172 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,176 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,177 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,177 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,178 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,179 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,181 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,182 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,184 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,185 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,185 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,185 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,185 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,185 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:09:24,189 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:09:24,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:09:24,238 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 03:09:24,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:09:24,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 178 transitions, 372 flow [2021-12-16 03:09:24,321 INFO L129 PetriNetUnfolder]: 13/176 cut-off events. [2021-12-16 03:09:24,321 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:24,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 13/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2021-12-16 03:09:24,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 178 transitions, 372 flow [2021-12-16 03:09:24,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 167 transitions, 346 flow [2021-12-16 03:09:24,388 INFO L129 PetriNetUnfolder]: 13/166 cut-off events. [2021-12-16 03:09:24,388 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:09:24,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:24,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:24,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash -715974748, now seen corresponding path program 1 times [2021-12-16 03:09:24,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192798202] [2021-12-16 03:09:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:24,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:24,709 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 03:09:24,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192798202] [2021-12-16 03:09:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192798202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:24,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:24,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:09:24,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043234791] [2021-12-16 03:09:24,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:24,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:09:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:09:24,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:09:24,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 178 [2021-12-16 03:09:24,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 167 transitions, 346 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 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 03:09:24,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:24,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 178 [2021-12-16 03:09:24,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:24,822 INFO L129 PetriNetUnfolder]: 17/189 cut-off events. [2021-12-16 03:09:24,822 INFO L130 PetriNetUnfolder]: For 17/20 co-relation queries the response was YES. [2021-12-16 03:09:24,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 189 events. 17/189 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 203 event pairs, 8 based on Foata normal form. 15/192 useless extension candidates. Maximal degree in co-relation 137. Up to 25 conditions per place. [2021-12-16 03:09:24,826 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 8 selfloop transitions, 0 changer transitions 5/158 dead transitions. [2021-12-16 03:09:24,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 158 transitions, 344 flow [2021-12-16 03:09:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:09:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:09:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2021-12-16 03:09:24,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9466292134831461 [2021-12-16 03:09:24,842 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2021-12-16 03:09:24,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2021-12-16 03:09:24,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:24,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2021-12-16 03:09:24,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 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 03:09:24,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 03:09:24,858 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 03:09:24,859 INFO L186 Difference]: Start difference. First operand has 161 places, 167 transitions, 346 flow. Second operand 2 states and 337 transitions. [2021-12-16 03:09:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 158 transitions, 344 flow [2021-12-16 03:09:24,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 158 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:24,866 INFO L242 Difference]: Finished difference. Result has 158 places, 153 transitions, 310 flow [2021-12-16 03:09:24,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=158, PETRI_TRANSITIONS=153} [2021-12-16 03:09:24,872 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2021-12-16 03:09:24,872 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 153 transitions, 310 flow [2021-12-16 03:09:24,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 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 03:09:24,873 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:24,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:24,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:09:24,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1666625947, now seen corresponding path program 1 times [2021-12-16 03:09:24,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:24,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387490415] [2021-12-16 03:09:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:25,094 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 03:09:25,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:25,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387490415] [2021-12-16 03:09:25,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387490415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:25,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:25,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:09:25,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588472018] [2021-12-16 03:09:25,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:25,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:09:25,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:09:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:09:25,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2021-12-16 03:09:25,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 153 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 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 03:09:25,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:25,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2021-12-16 03:09:25,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:25,305 INFO L129 PetriNetUnfolder]: 112/418 cut-off events. [2021-12-16 03:09:25,305 INFO L130 PetriNetUnfolder]: For 20/32 co-relation queries the response was YES. [2021-12-16 03:09:25,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 418 events. 112/418 cut-off events. For 20/32 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1483 event pairs, 33 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 673. Up to 120 conditions per place. [2021-12-16 03:09:25,310 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 59 selfloop transitions, 5 changer transitions 4/183 dead transitions. [2021-12-16 03:09:25,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 511 flow [2021-12-16 03:09:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:09:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:09:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2021-12-16 03:09:25,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7668539325842697 [2021-12-16 03:09:25,314 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2021-12-16 03:09:25,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2021-12-16 03:09:25,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:25,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2021-12-16 03:09:25,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 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 03:09:25,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 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 03:09:25,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 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 03:09:25,336 INFO L186 Difference]: Start difference. First operand has 158 places, 153 transitions, 310 flow. Second operand 6 states and 819 transitions. [2021-12-16 03:09:25,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 511 flow [2021-12-16 03:09:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:09:25,343 INFO L242 Difference]: Finished difference. Result has 161 places, 156 transitions, 339 flow [2021-12-16 03:09:25,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=161, PETRI_TRANSITIONS=156} [2021-12-16 03:09:25,344 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2021-12-16 03:09:25,344 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 156 transitions, 339 flow [2021-12-16 03:09:25,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 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 03:09:25,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:25,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:25,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:09:25,346 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1964545469, now seen corresponding path program 1 times [2021-12-16 03:09:25,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:25,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756253300] [2021-12-16 03:09:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:25,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:25,498 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 03:09:25,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756253300] [2021-12-16 03:09:25,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756253300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:25,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:25,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:09:25,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074761521] [2021-12-16 03:09:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:25,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:09:25,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:09:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:09:25,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-16 03:09:25,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 156 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 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 03:09:25,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:25,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-16 03:09:25,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:25,610 INFO L129 PetriNetUnfolder]: 109/423 cut-off events. [2021-12-16 03:09:25,611 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-12-16 03:09:25,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 423 events. 109/423 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1589 event pairs, 48 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 706. Up to 117 conditions per place. [2021-12-16 03:09:25,614 INFO L132 encePairwiseOnDemand]: 168/178 looper letters, 37 selfloop transitions, 11 changer transitions 4/184 dead transitions. [2021-12-16 03:09:25,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 515 flow [2021-12-16 03:09:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:09:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:09:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2021-12-16 03:09:25,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8865168539325843 [2021-12-16 03:09:25,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2021-12-16 03:09:25,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2021-12-16 03:09:25,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:25,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2021-12-16 03:09:25,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 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 03:09:25,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 03:09:25,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 03:09:25,620 INFO L186 Difference]: Start difference. First operand has 161 places, 156 transitions, 339 flow. Second operand 5 states and 789 transitions. [2021-12-16 03:09:25,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 515 flow [2021-12-16 03:09:25,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 511 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-16 03:09:25,627 INFO L242 Difference]: Finished difference. Result has 163 places, 160 transitions, 392 flow [2021-12-16 03:09:25,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2021-12-16 03:09:25,629 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2021-12-16 03:09:25,630 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 392 flow [2021-12-16 03:09:25,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 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 03:09:25,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:25,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:25,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:09:25,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash 76398777, now seen corresponding path program 2 times [2021-12-16 03:09:25,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154549356] [2021-12-16 03:09:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:25,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:25,741 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 03:09:25,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154549356] [2021-12-16 03:09:25,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154549356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:25,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:25,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:09:25,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362377391] [2021-12-16 03:09:25,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:25,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:09:25,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:09:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:09:25,744 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-16 03:09:25,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 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 03:09:25,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:25,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-16 03:09:25,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:25,832 INFO L129 PetriNetUnfolder]: 91/366 cut-off events. [2021-12-16 03:09:25,833 INFO L130 PetriNetUnfolder]: For 116/127 co-relation queries the response was YES. [2021-12-16 03:09:25,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 366 events. 91/366 cut-off events. For 116/127 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 28 based on Foata normal form. 13/371 useless extension candidates. Maximal degree in co-relation 682. Up to 116 conditions per place. [2021-12-16 03:09:25,835 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 33 selfloop transitions, 7 changer transitions 6/178 dead transitions. [2021-12-16 03:09:25,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 532 flow [2021-12-16 03:09:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:09:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:09:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2021-12-16 03:09:25,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8698501872659176 [2021-12-16 03:09:25,837 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2021-12-16 03:09:25,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2021-12-16 03:09:25,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:25,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2021-12-16 03:09:25,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 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 03:09:25,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 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 03:09:25,841 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 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 03:09:25,841 INFO L186 Difference]: Start difference. First operand has 163 places, 160 transitions, 392 flow. Second operand 6 states and 929 transitions. [2021-12-16 03:09:25,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 532 flow [2021-12-16 03:09:25,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:25,845 INFO L242 Difference]: Finished difference. Result has 166 places, 158 transitions, 385 flow [2021-12-16 03:09:25,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2021-12-16 03:09:25,846 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 5 predicate places. [2021-12-16 03:09:25,846 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 385 flow [2021-12-16 03:09:25,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 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 03:09:25,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:25,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:25,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:09:25,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1283420845, now seen corresponding path program 1 times [2021-12-16 03:09:25,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918647625] [2021-12-16 03:09:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:25,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:25,896 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 03:09:25,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918647625] [2021-12-16 03:09:25,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918647625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:25,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:25,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:09:25,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371965659] [2021-12-16 03:09:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:25,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:09:25,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:09:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:09:25,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2021-12-16 03:09:25,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 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 03:09:25,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:25,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2021-12-16 03:09:25,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:25,981 INFO L129 PetriNetUnfolder]: 31/275 cut-off events. [2021-12-16 03:09:25,982 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2021-12-16 03:09:25,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 275 events. 31/275 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 564 event pairs, 14 based on Foata normal form. 5/271 useless extension candidates. Maximal degree in co-relation 462. Up to 56 conditions per place. [2021-12-16 03:09:25,983 INFO L132 encePairwiseOnDemand]: 169/178 looper letters, 35 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2021-12-16 03:09:25,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 493 flow [2021-12-16 03:09:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:09:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:09:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2021-12-16 03:09:25,986 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7881219903691814 [2021-12-16 03:09:25,986 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2021-12-16 03:09:25,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2021-12-16 03:09:25,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:25,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2021-12-16 03:09:25,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 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 03:09:25,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 03:09:25,990 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 03:09:25,990 INFO L186 Difference]: Start difference. First operand has 166 places, 158 transitions, 385 flow. Second operand 7 states and 982 transitions. [2021-12-16 03:09:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 493 flow [2021-12-16 03:09:25,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 473 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:25,995 INFO L242 Difference]: Finished difference. Result has 170 places, 159 transitions, 389 flow [2021-12-16 03:09:25,996 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2021-12-16 03:09:25,997 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 9 predicate places. [2021-12-16 03:09:25,998 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 389 flow [2021-12-16 03:09:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 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 03:09:25,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:25,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:25,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:09:25,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2085282566, now seen corresponding path program 1 times [2021-12-16 03:09:26,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:26,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825370528] [2021-12-16 03:09:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:26,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:09:26,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825370528] [2021-12-16 03:09:26,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825370528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:26,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883332550] [2021-12-16 03:09:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:26,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:26,100 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 03:09:26,101 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 03:09:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:09:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:09:26,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:09:26,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883332550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:26,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:26,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-16 03:09:26,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167762239] [2021-12-16 03:09:26,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:26,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:09:26,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:09:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:09:26,864 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2021-12-16 03:09:26,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 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 03:09:26,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:26,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2021-12-16 03:09:26,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:27,065 INFO L129 PetriNetUnfolder]: 110/441 cut-off events. [2021-12-16 03:09:27,066 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2021-12-16 03:09:27,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 441 events. 110/441 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1460 event pairs, 20 based on Foata normal form. 7/445 useless extension candidates. Maximal degree in co-relation 861. Up to 70 conditions per place. [2021-12-16 03:09:27,069 INFO L132 encePairwiseOnDemand]: 170/178 looper letters, 58 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2021-12-16 03:09:27,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 713 flow [2021-12-16 03:09:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:09:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:09:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2021-12-16 03:09:27,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8628277153558053 [2021-12-16 03:09:27,072 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2021-12-16 03:09:27,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2021-12-16 03:09:27,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:27,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2021-12-16 03:09:27,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 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 03:09:27,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 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 03:09:27,098 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 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 03:09:27,099 INFO L186 Difference]: Start difference. First operand has 170 places, 159 transitions, 389 flow. Second operand 12 states and 1843 transitions. [2021-12-16 03:09:27,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 713 flow [2021-12-16 03:09:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 703 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:27,104 INFO L242 Difference]: Finished difference. Result has 181 places, 170 transitions, 498 flow [2021-12-16 03:09:27,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2021-12-16 03:09:27,106 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 20 predicate places. [2021-12-16 03:09:27,106 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 498 flow [2021-12-16 03:09:27,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 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 03:09:27,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:27,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:27,135 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 03:09:27,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 03:09:27,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash 409516862, now seen corresponding path program 1 times [2021-12-16 03:09:27,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065933398] [2021-12-16 03:09:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:27,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:09:27,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065933398] [2021-12-16 03:09:27,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065933398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:09:27,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:09:27,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:09:27,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292502922] [2021-12-16 03:09:27,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:09:27,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:09:27,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:27,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:09:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:09:27,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2021-12-16 03:09:27,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 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 03:09:27,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:27,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2021-12-16 03:09:27,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:27,519 INFO L129 PetriNetUnfolder]: 46/388 cut-off events. [2021-12-16 03:09:27,520 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2021-12-16 03:09:27,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 388 events. 46/388 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1005 event pairs, 21 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 737. Up to 90 conditions per place. [2021-12-16 03:09:27,522 INFO L132 encePairwiseOnDemand]: 167/178 looper letters, 40 selfloop transitions, 8 changer transitions 17/191 dead transitions. [2021-12-16 03:09:27,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 191 transitions, 682 flow [2021-12-16 03:09:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:09:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 03:09:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1262 transitions. [2021-12-16 03:09:27,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.787765293383271 [2021-12-16 03:09:27,537 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1262 transitions. [2021-12-16 03:09:27,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1262 transitions. [2021-12-16 03:09:27,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:27,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1262 transitions. [2021-12-16 03:09:27,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.22222222222223) internal successors, (1262), 9 states have internal predecessors, (1262), 0 states have call successors, (0), 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 03:09:27,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 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 03:09:27,542 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 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 03:09:27,543 INFO L186 Difference]: Start difference. First operand has 181 places, 170 transitions, 498 flow. Second operand 9 states and 1262 transitions. [2021-12-16 03:09:27,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 191 transitions, 682 flow [2021-12-16 03:09:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 191 transitions, 645 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-16 03:09:27,547 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 491 flow [2021-12-16 03:09:27,547 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=491, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2021-12-16 03:09:27,548 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 26 predicate places. [2021-12-16 03:09:27,548 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 491 flow [2021-12-16 03:09:27,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 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 03:09:27,548 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:27,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:27,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:09:27,549 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1964108106, now seen corresponding path program 1 times [2021-12-16 03:09:27,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742102505] [2021-12-16 03:09:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:27,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:30,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742102505] [2021-12-16 03:09:30,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742102505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406988155] [2021-12-16 03:09:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:30,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:30,325 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 03:09:30,328 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 03:09:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-16 03:09:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:09:33,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 03:09:33,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2021-12-16 03:09:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:34,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:09:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 138 [2021-12-16 03:09:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:37,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406988155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:37,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:37,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 31] total 103 [2021-12-16 03:09:37,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438878224] [2021-12-16 03:09:37,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:38,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-16 03:09:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-16 03:09:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=9550, Unknown=0, NotChecked=0, Total=10506 [2021-12-16 03:09:38,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2021-12-16 03:09:38,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 491 flow. Second operand has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 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 03:09:38,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:38,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2021-12-16 03:09:38,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:10:02,437 INFO L129 PetriNetUnfolder]: 1779/3772 cut-off events. [2021-12-16 03:10:02,438 INFO L130 PetriNetUnfolder]: For 2836/2836 co-relation queries the response was YES. [2021-12-16 03:10:02,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9848 conditions, 3772 events. 1779/3772 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27159 event pairs, 55 based on Foata normal form. 51/3816 useless extension candidates. Maximal degree in co-relation 9831. Up to 564 conditions per place. [2021-12-16 03:10:02,464 INFO L132 encePairwiseOnDemand]: 121/178 looper letters, 483 selfloop transitions, 476 changer transitions 48/1061 dead transitions. [2021-12-16 03:10:02,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1061 transitions, 5717 flow [2021-12-16 03:10:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-12-16 03:10:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-12-16 03:10:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 13773 transitions. [2021-12-16 03:10:02,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3868820224719101 [2021-12-16 03:10:02,485 INFO L72 ComplementDD]: Start complementDD. Operand 200 states and 13773 transitions. [2021-12-16 03:10:02,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 13773 transitions. [2021-12-16 03:10:02,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:10:02,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 200 states and 13773 transitions. [2021-12-16 03:10:02,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 201 states, 200 states have (on average 68.865) internal successors, (13773), 200 states have internal predecessors, (13773), 0 states have call successors, (0), 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 03:10:02,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 201 states, 201 states have (on average 178.0) internal successors, (35778), 201 states have internal predecessors, (35778), 0 states have call successors, (0), 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 03:10:02,573 INFO L81 ComplementDD]: Finished complementDD. Result has 201 states, 201 states have (on average 178.0) internal successors, (35778), 201 states have internal predecessors, (35778), 0 states have call successors, (0), 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 03:10:02,573 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 491 flow. Second operand 200 states and 13773 transitions. [2021-12-16 03:10:02,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1061 transitions, 5717 flow [2021-12-16 03:10:02,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1061 transitions, 5484 flow, removed 81 selfloop flow, removed 7 redundant places. [2021-12-16 03:10:02,612 INFO L242 Difference]: Finished difference. Result has 459 places, 656 transitions, 4058 flow [2021-12-16 03:10:02,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=200, PETRI_FLOW=4058, PETRI_PLACES=459, PETRI_TRANSITIONS=656} [2021-12-16 03:10:02,614 INFO L334 CegarLoopForPetriNet]: 161 programPoint places, 298 predicate places. [2021-12-16 03:10:02,614 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 656 transitions, 4058 flow [2021-12-16 03:10:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 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 03:10:02,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:10:02,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:10:02,634 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 03:10:02,833 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,SelfDestructingSolverStorable7 [2021-12-16 03:10:02,834 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:10:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:10:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash -628938598, now seen corresponding path program 2 times [2021-12-16 03:10:02,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:10:02,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6256141] [2021-12-16 03:10:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:10:02,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:10:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:10:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:04,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:10:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6256141] [2021-12-16 03:10:04,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6256141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:10:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585699143] [2021-12-16 03:10:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:10:04,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:10:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:10:04,982 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 03:10:04,983 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 03:10:05,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:10:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:10:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-16 03:10:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:10:07,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 03:10:08,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:10:08,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:10:08,766 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-16 03:10:08,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2021-12-16 03:10:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:10:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:10:13,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:10:13,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 138 [2021-12-16 03:10:13,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:10:13,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 770 treesize of output 774 [2021-12-16 03:10:13,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:10:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 666 treesize of output 684 [2021-12-16 03:10:13,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:10:13,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 528