./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:46:00,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:46:00,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:46:00,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:46:00,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:46:00,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:46:00,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:46:00,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:46:00,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:46:00,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:46:00,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:46:00,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:46:00,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:46:00,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:46:00,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:46:00,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:46:00,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:46:00,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:46:00,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:46:00,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:46:00,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:46:00,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:46:00,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:46:00,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:46:00,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:46:00,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:46:00,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:46:00,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:46:00,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:46:00,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:46:00,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:46:00,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:46:00,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:46:00,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:46:00,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:46:00,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:46:00,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:46:00,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:46:00,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:46:00,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:46:00,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:46:00,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:46:00,644 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:46:00,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:46:00,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:46:00,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:46:00,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:46:00,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:46:00,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:46:00,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:46:00,647 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:46:00,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:46:00,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:46:00,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:46:00,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:46:00,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:46:00,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:46:00,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:46:00,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:46:00,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:46:00,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:46:00,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:46:00,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:46:00,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:46:00,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:46:00,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:46:00,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:46:00,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:46:00,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:46:00,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:46:00,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:46:00,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2021-12-22 13:46:00,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:46:00,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:46:00,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:46:00,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:46:00,900 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:46:00,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2021-12-22 13:46:00,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e884e7b9e/ed565899a705490288f22db09e323ec3/FLAGdf2f56370 [2021-12-22 13:46:01,307 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:46:01,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2021-12-22 13:46:01,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e884e7b9e/ed565899a705490288f22db09e323ec3/FLAGdf2f56370 [2021-12-22 13:46:01,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e884e7b9e/ed565899a705490288f22db09e323ec3 [2021-12-22 13:46:01,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:46:01,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:46:01,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:46:01,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:46:01,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:46:01,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6824d40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01, skipping insertion in model container [2021-12-22 13:46:01,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:46:01,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:46:01,532 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-counter-fun.wvr.c[2681,2694] [2021-12-22 13:46:01,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:46:01,551 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:46:01,587 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-counter-fun.wvr.c[2681,2694] [2021-12-22 13:46:01,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:46:01,605 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:46:01,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01 WrapperNode [2021-12-22 13:46:01,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:46:01,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:46:01,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:46:01,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:46:01,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,658 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2021-12-22 13:46:01,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:46:01,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:46:01,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:46:01,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:46:01,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:46:01,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:46:01,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:46:01,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:46:01,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (1/1) ... [2021-12-22 13:46:01,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:46:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:01,732 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) [2021-12-22 13:46:01,755 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 [2021-12-22 13:46:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:46:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:46:01,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:46:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:46:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:46:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:46:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:46:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:46:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:46:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:46:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:46:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:46:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:46:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:46:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:46:01,779 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:46:01,871 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:46:01,873 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:46:02,249 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:46:02,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:46:02,423 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 13:46:02,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:46:02 BoogieIcfgContainer [2021-12-22 13:46:02,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:46:02,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:46:02,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:46:02,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:46:02,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:46:01" (1/3) ... [2021-12-22 13:46:02,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78311c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:46:02, skipping insertion in model container [2021-12-22 13:46:02,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:46:01" (2/3) ... [2021-12-22 13:46:02,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78311c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:46:02, skipping insertion in model container [2021-12-22 13:46:02,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:46:02" (3/3) ... [2021-12-22 13:46:02,435 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2021-12-22 13:46:02,443 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:46:02,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:46:02,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:46:02,443 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:46:02,487 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,489 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,489 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,489 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,489 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,492 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,493 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,493 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,494 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,495 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,495 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,496 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,497 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,497 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,497 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,500 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,500 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,500 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,500 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,501 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,501 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,501 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,501 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,501 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,506 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,507 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,508 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,508 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,508 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,511 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,512 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,512 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,516 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,516 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,527 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:46:02,534 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:46:02,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:46:02,578 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 [2021-12-22 13:46:02,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:46:02,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2021-12-22 13:46:02,663 INFO L129 PetriNetUnfolder]: 13/163 cut-off events. [2021-12-22 13:46:02,663 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:46:02,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2021-12-22 13:46:02,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2021-12-22 13:46:02,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2021-12-22 13:46:02,708 INFO L129 PetriNetUnfolder]: 13/153 cut-off events. [2021-12-22 13:46:02,712 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:46:02,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:02,713 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] [2021-12-22 13:46:02,714 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash -971864850, now seen corresponding path program 1 times [2021-12-22 13:46:02,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:02,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742805734] [2021-12-22 13:46:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:02,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:03,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:03,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742805734] [2021-12-22 13:46:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742805734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:03,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:03,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:03,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022988145] [2021-12-22 13:46:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:03,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:03,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:03,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2021-12-22 13:46:03,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-12-22 13:46:03,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:03,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2021-12-22 13:46:03,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:03,354 INFO L129 PetriNetUnfolder]: 14/195 cut-off events. [2021-12-22 13:46:03,354 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-12-22 13:46:03,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 195 events. 14/195 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 150. Up to 23 conditions per place. [2021-12-22 13:46:03,358 INFO L132 encePairwiseOnDemand]: 145/165 looper letters, 28 selfloop transitions, 3 changer transitions 10/154 dead transitions. [2021-12-22 13:46:03,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 411 flow [2021-12-22 13:46:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:46:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:46:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 915 transitions. [2021-12-22 13:46:03,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2021-12-22 13:46:03,379 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 915 transitions. [2021-12-22 13:46:03,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 915 transitions. [2021-12-22 13:46:03,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:03,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 915 transitions. [2021-12-22 13:46:03,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 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) [2021-12-22 13:46:03,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 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) [2021-12-22 13:46:03,398 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 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) [2021-12-22 13:46:03,400 INFO L186 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 7 states and 915 transitions. [2021-12-22 13:46:03,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 411 flow [2021-12-22 13:46:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 154 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:46:03,409 INFO L242 Difference]: Finished difference. Result has 153 places, 142 transitions, 307 flow [2021-12-22 13:46:03,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2021-12-22 13:46:03,414 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2021-12-22 13:46:03,414 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 307 flow [2021-12-22 13:46:03,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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) [2021-12-22 13:46:03,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:03,415 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] [2021-12-22 13:46:03,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:46:03,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 202378132, now seen corresponding path program 1 times [2021-12-22 13:46:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810654241] [2021-12-22 13:46:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:03,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:03,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810654241] [2021-12-22 13:46:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810654241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713763639] [2021-12-22 13:46:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:03,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:03,564 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) [2021-12-22 13:46:03,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:46:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:46:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:04,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:46:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713763639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:04,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:46:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-22 13:46:04,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603632449] [2021-12-22 13:46:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:04,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:46:04,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:46:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:46:04,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2021-12-22 13:46:04,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 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) [2021-12-22 13:46:04,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:04,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2021-12-22 13:46:04,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:04,486 INFO L129 PetriNetUnfolder]: 15/265 cut-off events. [2021-12-22 13:46:04,487 INFO L130 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2021-12-22 13:46:04,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 509 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2021-12-22 13:46:04,488 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2021-12-22 13:46:04,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 467 flow [2021-12-22 13:46:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:46:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:46:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2021-12-22 13:46:04,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2021-12-22 13:46:04,491 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2021-12-22 13:46:04,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2021-12-22 13:46:04,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:04,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2021-12-22 13:46:04,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 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) [2021-12-22 13:46:04,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 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) [2021-12-22 13:46:04,499 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 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) [2021-12-22 13:46:04,499 INFO L186 Difference]: Start difference. First operand has 153 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2021-12-22 13:46:04,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 467 flow [2021-12-22 13:46:04,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-22 13:46:04,503 INFO L242 Difference]: Finished difference. Result has 152 places, 143 transitions, 332 flow [2021-12-22 13:46:04,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2021-12-22 13:46:04,504 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2021-12-22 13:46:04,504 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 332 flow [2021-12-22 13:46:04,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 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) [2021-12-22 13:46:04,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:04,505 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] [2021-12-22 13:46:04,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:04,724 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1935558459, now seen corresponding path program 1 times [2021-12-22 13:46:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599110560] [2021-12-22 13:46:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:04,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:04,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:04,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599110560] [2021-12-22 13:46:04,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599110560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:04,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:04,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:04,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313430867] [2021-12-22 13:46:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:04,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:04,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:04,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:04,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:04,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:04,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:04,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:04,898 INFO L129 PetriNetUnfolder]: 118/434 cut-off events. [2021-12-22 13:46:04,898 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-12-22 13:46:04,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 434 events. 118/434 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1592 event pairs, 37 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 662. Up to 126 conditions per place. [2021-12-22 13:46:04,902 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 36 selfloop transitions, 5 changer transitions 4/168 dead transitions. [2021-12-22 13:46:04,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 168 transitions, 491 flow [2021-12-22 13:46:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:46:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:46:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 864 transitions. [2021-12-22 13:46:04,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8727272727272727 [2021-12-22 13:46:04,905 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 864 transitions. [2021-12-22 13:46:04,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 864 transitions. [2021-12-22 13:46:04,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:04,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 864 transitions. [2021-12-22 13:46:04,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 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) [2021-12-22 13:46:04,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:04,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:04,910 INFO L186 Difference]: Start difference. First operand has 152 places, 143 transitions, 332 flow. Second operand 6 states and 864 transitions. [2021-12-22 13:46:04,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 168 transitions, 491 flow [2021-12-22 13:46:04,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 168 transitions, 475 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-22 13:46:04,915 INFO L242 Difference]: Finished difference. Result has 152 places, 145 transitions, 342 flow [2021-12-22 13:46:04,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2021-12-22 13:46:04,918 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2021-12-22 13:46:04,918 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 342 flow [2021-12-22 13:46:04,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:04,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:04,919 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] [2021-12-22 13:46:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:46:04,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash -774645913, now seen corresponding path program 2 times [2021-12-22 13:46:04,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:04,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538761273] [2021-12-22 13:46:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:04,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:05,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538761273] [2021-12-22 13:46:05,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538761273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415489224] [2021-12-22 13:46:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:46:05,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:05,036 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) [2021-12-22 13:46:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:46:05,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:46:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:05,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:05,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415489224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:05,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:05,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-22 13:46:05,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70312934] [2021-12-22 13:46:05,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:05,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:46:05,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:46:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:46:05,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:05,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 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) [2021-12-22 13:46:05,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:05,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:05,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:05,775 INFO L129 PetriNetUnfolder]: 192/589 cut-off events. [2021-12-22 13:46:05,775 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2021-12-22 13:46:05,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 589 events. 192/589 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2561 event pairs, 7 based on Foata normal form. 9/593 useless extension candidates. Maximal degree in co-relation 1152. Up to 71 conditions per place. [2021-12-22 13:46:05,780 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 72 selfloop transitions, 31 changer transitions 1/227 dead transitions. [2021-12-22 13:46:05,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 227 transitions, 842 flow [2021-12-22 13:46:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:46:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:46:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2021-12-22 13:46:05,786 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2021-12-22 13:46:05,786 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2021-12-22 13:46:05,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2021-12-22 13:46:05,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:05,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2021-12-22 13:46:05,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 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) [2021-12-22 13:46:05,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 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) [2021-12-22 13:46:05,798 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 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) [2021-12-22 13:46:05,798 INFO L186 Difference]: Start difference. First operand has 152 places, 145 transitions, 342 flow. Second operand 14 states and 2008 transitions. [2021-12-22 13:46:05,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 227 transitions, 842 flow [2021-12-22 13:46:05,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 227 transitions, 815 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-12-22 13:46:05,804 INFO L242 Difference]: Finished difference. Result has 168 places, 177 transitions, 554 flow [2021-12-22 13:46:05,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=554, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2021-12-22 13:46:05,806 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 20 predicate places. [2021-12-22 13:46:05,806 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 554 flow [2021-12-22 13:46:05,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 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) [2021-12-22 13:46:05,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:05,807 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] [2021-12-22 13:46:05,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:06,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 13:46:06,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1462097601, now seen corresponding path program 1 times [2021-12-22 13:46:06,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:06,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44065425] [2021-12-22 13:46:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:06,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:06,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44065425] [2021-12-22 13:46:06,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44065425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953590226] [2021-12-22 13:46:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:06,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:06,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:06,091 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) [2021-12-22 13:46:06,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:46:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:06,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:46:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:06,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:46:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953590226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:06,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:46:06,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-22 13:46:06,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399533946] [2021-12-22 13:46:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:06,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:46:06,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:46:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:46:06,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2021-12-22 13:46:06,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 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) [2021-12-22 13:46:06,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:06,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2021-12-22 13:46:06,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:06,698 INFO L129 PetriNetUnfolder]: 68/475 cut-off events. [2021-12-22 13:46:06,699 INFO L130 PetriNetUnfolder]: For 284/300 co-relation queries the response was YES. [2021-12-22 13:46:06,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 475 events. 68/475 cut-off events. For 284/300 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1986 event pairs, 14 based on Foata normal form. 12/475 useless extension candidates. Maximal degree in co-relation 817. Up to 76 conditions per place. [2021-12-22 13:46:06,702 INFO L132 encePairwiseOnDemand]: 155/165 looper letters, 34 selfloop transitions, 7 changer transitions 5/186 dead transitions. [2021-12-22 13:46:06,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 668 flow [2021-12-22 13:46:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:46:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:46:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2021-12-22 13:46:06,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7674242424242425 [2021-12-22 13:46:06,705 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2021-12-22 13:46:06,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2021-12-22 13:46:06,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:06,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2021-12-22 13:46:06,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 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) [2021-12-22 13:46:06,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:06,711 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:46:06,712 INFO L186 Difference]: Start difference. First operand has 168 places, 177 transitions, 554 flow. Second operand 8 states and 1013 transitions. [2021-12-22 13:46:06,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 668 flow [2021-12-22 13:46:06,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 186 transitions, 666 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-22 13:46:06,717 INFO L242 Difference]: Finished difference. Result has 177 places, 178 transitions, 578 flow [2021-12-22 13:46:06,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=177, PETRI_TRANSITIONS=178} [2021-12-22 13:46:06,718 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 29 predicate places. [2021-12-22 13:46:06,718 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 178 transitions, 578 flow [2021-12-22 13:46:06,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 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) [2021-12-22 13:46:06,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:06,719 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] [2021-12-22 13:46:06,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:06,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:06,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:06,936 INFO L85 PathProgramCache]: Analyzing trace with hash -533874036, now seen corresponding path program 1 times [2021-12-22 13:46:06,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:06,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644111657] [2021-12-22 13:46:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:06,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:06,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644111657] [2021-12-22 13:46:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644111657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:06,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:06,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:06,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861426104] [2021-12-22 13:46:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:06,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:06,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:06,995 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:06,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 178 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:06,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:06,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:06,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:07,121 INFO L129 PetriNetUnfolder]: 216/682 cut-off events. [2021-12-22 13:46:07,121 INFO L130 PetriNetUnfolder]: For 818/833 co-relation queries the response was YES. [2021-12-22 13:46:07,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 682 events. 216/682 cut-off events. For 818/833 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3308 event pairs, 80 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 1693. Up to 229 conditions per place. [2021-12-22 13:46:07,126 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 69 selfloop transitions, 16 changer transitions 1/210 dead transitions. [2021-12-22 13:46:07,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 914 flow [2021-12-22 13:46:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:46:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:46:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2021-12-22 13:46:07,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2021-12-22 13:46:07,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2021-12-22 13:46:07,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2021-12-22 13:46:07,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:07,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2021-12-22 13:46:07,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 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) [2021-12-22 13:46:07,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 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) [2021-12-22 13:46:07,133 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 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) [2021-12-22 13:46:07,133 INFO L186 Difference]: Start difference. First operand has 177 places, 178 transitions, 578 flow. Second operand 5 states and 737 transitions. [2021-12-22 13:46:07,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 914 flow [2021-12-22 13:46:07,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 210 transitions, 890 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-12-22 13:46:07,140 INFO L242 Difference]: Finished difference. Result has 176 places, 185 transitions, 665 flow [2021-12-22 13:46:07,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=665, PETRI_PLACES=176, PETRI_TRANSITIONS=185} [2021-12-22 13:46:07,143 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 28 predicate places. [2021-12-22 13:46:07,143 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 185 transitions, 665 flow [2021-12-22 13:46:07,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:07,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:07,144 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] [2021-12-22 13:46:07,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:46:07,144 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1873111084, now seen corresponding path program 2 times [2021-12-22 13:46:07,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:07,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963631080] [2021-12-22 13:46:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:07,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:07,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:07,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963631080] [2021-12-22 13:46:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963631080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:07,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228578679] [2021-12-22 13:46:07,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:46:07,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:07,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:07,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:46:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:46:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:07,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:07,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228578679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:07,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:07,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 13:46:07,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871260972] [2021-12-22 13:46:07,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:07,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:46:07,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:46:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:46:07,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:07,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 185 transitions, 665 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 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) [2021-12-22 13:46:07,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:07,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:07,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:07,971 INFO L129 PetriNetUnfolder]: 228/776 cut-off events. [2021-12-22 13:46:07,971 INFO L130 PetriNetUnfolder]: For 1144/1148 co-relation queries the response was YES. [2021-12-22 13:46:07,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 776 events. 228/776 cut-off events. For 1144/1148 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4130 event pairs, 38 based on Foata normal form. 12/781 useless extension candidates. Maximal degree in co-relation 1959. Up to 137 conditions per place. [2021-12-22 13:46:07,977 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 74 selfloop transitions, 48 changer transitions 1/247 dead transitions. [2021-12-22 13:46:07,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 1212 flow [2021-12-22 13:46:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:46:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:46:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1308 transitions. [2021-12-22 13:46:07,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8808080808080808 [2021-12-22 13:46:07,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1308 transitions. [2021-12-22 13:46:07,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1308 transitions. [2021-12-22 13:46:07,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:07,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1308 transitions. [2021-12-22 13:46:07,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.33333333333334) internal successors, (1308), 9 states have internal predecessors, (1308), 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) [2021-12-22 13:46:07,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2021-12-22 13:46:07,986 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2021-12-22 13:46:07,986 INFO L186 Difference]: Start difference. First operand has 176 places, 185 transitions, 665 flow. Second operand 9 states and 1308 transitions. [2021-12-22 13:46:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 1212 flow [2021-12-22 13:46:07,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 1200 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:46:08,008 INFO L242 Difference]: Finished difference. Result has 188 places, 205 transitions, 945 flow [2021-12-22 13:46:08,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=188, PETRI_TRANSITIONS=205} [2021-12-22 13:46:08,009 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 40 predicate places. [2021-12-22 13:46:08,009 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 205 transitions, 945 flow [2021-12-22 13:46:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 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) [2021-12-22 13:46:08,010 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:08,010 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] [2021-12-22 13:46:08,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:08,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:08,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1869100938, now seen corresponding path program 1 times [2021-12-22 13:46:08,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:08,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418072858] [2021-12-22 13:46:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:08,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:08,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418072858] [2021-12-22 13:46:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418072858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83308238] [2021-12-22 13:46:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:08,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:08,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:08,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:46:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:46:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:08,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:08,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83308238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:08,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:08,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-22 13:46:08,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684198959] [2021-12-22 13:46:08,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:08,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:46:08,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:46:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:46:08,722 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:08,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 205 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 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) [2021-12-22 13:46:08,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:08,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:08,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:08,964 INFO L129 PetriNetUnfolder]: 260/848 cut-off events. [2021-12-22 13:46:08,965 INFO L130 PetriNetUnfolder]: For 1943/1943 co-relation queries the response was YES. [2021-12-22 13:46:08,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 848 events. 260/848 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4670 event pairs, 27 based on Foata normal form. 5/846 useless extension candidates. Maximal degree in co-relation 2471. Up to 109 conditions per place. [2021-12-22 13:46:08,971 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 87 selfloop transitions, 75 changer transitions 0/286 dead transitions. [2021-12-22 13:46:08,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 286 transitions, 1760 flow [2021-12-22 13:46:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:46:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:46:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2004 transitions. [2021-12-22 13:46:08,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8675324675324675 [2021-12-22 13:46:08,976 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2004 transitions. [2021-12-22 13:46:08,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2004 transitions. [2021-12-22 13:46:08,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:08,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2004 transitions. [2021-12-22 13:46:08,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 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) [2021-12-22 13:46:08,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 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) [2021-12-22 13:46:08,985 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 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) [2021-12-22 13:46:08,986 INFO L186 Difference]: Start difference. First operand has 188 places, 205 transitions, 945 flow. Second operand 14 states and 2004 transitions. [2021-12-22 13:46:08,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 286 transitions, 1760 flow [2021-12-22 13:46:08,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 286 transitions, 1726 flow, removed 17 selfloop flow, removed 0 redundant places. [2021-12-22 13:46:09,000 INFO L242 Difference]: Finished difference. Result has 205 places, 237 transitions, 1402 flow [2021-12-22 13:46:09,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1402, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2021-12-22 13:46:09,003 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2021-12-22 13:46:09,003 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 1402 flow [2021-12-22 13:46:09,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 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) [2021-12-22 13:46:09,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:09,004 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] [2021-12-22 13:46:09,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:09,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:09,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash -89082242, now seen corresponding path program 2 times [2021-12-22 13:46:09,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231771164] [2021-12-22 13:46:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:09,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:09,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231771164] [2021-12-22 13:46:09,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231771164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:09,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:09,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:09,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410053893] [2021-12-22 13:46:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:09,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:09,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:09,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:09,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 1402 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:09,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:09,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:09,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:09,473 INFO L129 PetriNetUnfolder]: 260/873 cut-off events. [2021-12-22 13:46:09,474 INFO L130 PetriNetUnfolder]: For 2861/2863 co-relation queries the response was YES. [2021-12-22 13:46:09,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 873 events. 260/873 cut-off events. For 2861/2863 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4959 event pairs, 91 based on Foata normal form. 2/865 useless extension candidates. Maximal degree in co-relation 2765. Up to 282 conditions per place. [2021-12-22 13:46:09,481 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 110 selfloop transitions, 24 changer transitions 6/264 dead transitions. [2021-12-22 13:46:09,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 1905 flow [2021-12-22 13:46:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:46:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:46:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2021-12-22 13:46:09,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2021-12-22 13:46:09,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2021-12-22 13:46:09,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2021-12-22 13:46:09,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:09,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2021-12-22 13:46:09,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 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) [2021-12-22 13:46:09,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:09,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:09,490 INFO L186 Difference]: Start difference. First operand has 205 places, 237 transitions, 1402 flow. Second operand 6 states and 865 transitions. [2021-12-22 13:46:09,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 1905 flow [2021-12-22 13:46:09,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 264 transitions, 1777 flow, removed 38 selfloop flow, removed 3 redundant places. [2021-12-22 13:46:09,508 INFO L242 Difference]: Finished difference. Result has 209 places, 237 transitions, 1343 flow [2021-12-22 13:46:09,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1343, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2021-12-22 13:46:09,509 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2021-12-22 13:46:09,509 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 1343 flow [2021-12-22 13:46:09,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:09,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:09,510 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] [2021-12-22 13:46:09,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:46:09,511 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -552919854, now seen corresponding path program 3 times [2021-12-22 13:46:09,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:09,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474652626] [2021-12-22 13:46:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:09,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:09,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474652626] [2021-12-22 13:46:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474652626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449856236] [2021-12-22 13:46:09,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:09,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:09,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:09,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:46:09,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:46:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:46:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:09,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:10,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449856236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:10,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:10,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 13:46:10,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149673998] [2021-12-22 13:46:10,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:10,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:46:10,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:46:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:46:10,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:10,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 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) [2021-12-22 13:46:10,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:10,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:10,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:10,269 INFO L129 PetriNetUnfolder]: 268/907 cut-off events. [2021-12-22 13:46:10,269 INFO L130 PetriNetUnfolder]: For 2753/2753 co-relation queries the response was YES. [2021-12-22 13:46:10,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 907 events. 268/907 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5293 event pairs, 78 based on Foata normal form. 5/901 useless extension candidates. Maximal degree in co-relation 2767. Up to 182 conditions per place. [2021-12-22 13:46:10,276 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 55 changer transitions 1/288 dead transitions. [2021-12-22 13:46:10,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 1966 flow [2021-12-22 13:46:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:46:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:46:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1307 transitions. [2021-12-22 13:46:10,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8801346801346801 [2021-12-22 13:46:10,279 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1307 transitions. [2021-12-22 13:46:10,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1307 transitions. [2021-12-22 13:46:10,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:10,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1307 transitions. [2021-12-22 13:46:10,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.22222222222223) internal successors, (1307), 9 states have internal predecessors, (1307), 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) [2021-12-22 13:46:10,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2021-12-22 13:46:10,285 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2021-12-22 13:46:10,285 INFO L186 Difference]: Start difference. First operand has 209 places, 237 transitions, 1343 flow. Second operand 9 states and 1307 transitions. [2021-12-22 13:46:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 1966 flow [2021-12-22 13:46:10,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 288 transitions, 1938 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-12-22 13:46:10,301 INFO L242 Difference]: Finished difference. Result has 217 places, 249 transitions, 1610 flow [2021-12-22 13:46:10,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=217, PETRI_TRANSITIONS=249} [2021-12-22 13:46:10,302 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 69 predicate places. [2021-12-22 13:46:10,302 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 249 transitions, 1610 flow [2021-12-22 13:46:10,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 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) [2021-12-22 13:46:10,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:10,303 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] [2021-12-22 13:46:10,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:10,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1815906442, now seen corresponding path program 3 times [2021-12-22 13:46:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612641731] [2021-12-22 13:46:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:10,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:10,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612641731] [2021-12-22 13:46:10,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612641731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058935513] [2021-12-22 13:46:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:10,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:10,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:10,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:46:10,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:46:10,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:10,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:46:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:10,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:11,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058935513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:11,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-22 13:46:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850923358] [2021-12-22 13:46:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:11,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:46:11,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:46:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:46:11,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:11,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 1610 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 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) [2021-12-22 13:46:11,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:11,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:11,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:11,414 INFO L129 PetriNetUnfolder]: 306/1052 cut-off events. [2021-12-22 13:46:11,415 INFO L130 PetriNetUnfolder]: For 4008/4008 co-relation queries the response was YES. [2021-12-22 13:46:11,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 1052 events. 306/1052 cut-off events. For 4008/4008 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6595 event pairs, 40 based on Foata normal form. 6/1048 useless extension candidates. Maximal degree in co-relation 3343. Up to 139 conditions per place. [2021-12-22 13:46:11,424 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 109 selfloop transitions, 80 changer transitions 2/315 dead transitions. [2021-12-22 13:46:11,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 2365 flow [2021-12-22 13:46:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:46:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:46:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2021-12-22 13:46:11,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2021-12-22 13:46:11,430 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2021-12-22 13:46:11,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2021-12-22 13:46:11,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:11,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2021-12-22 13:46:11,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 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) [2021-12-22 13:46:11,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 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) [2021-12-22 13:46:11,438 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 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) [2021-12-22 13:46:11,438 INFO L186 Difference]: Start difference. First operand has 217 places, 249 transitions, 1610 flow. Second operand 13 states and 1877 transitions. [2021-12-22 13:46:11,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 2365 flow [2021-12-22 13:46:11,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 315 transitions, 2202 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-22 13:46:11,461 INFO L242 Difference]: Finished difference. Result has 225 places, 259 transitions, 1736 flow [2021-12-22 13:46:11,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1736, PETRI_PLACES=225, PETRI_TRANSITIONS=259} [2021-12-22 13:46:11,461 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 77 predicate places. [2021-12-22 13:46:11,461 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 259 transitions, 1736 flow [2021-12-22 13:46:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 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) [2021-12-22 13:46:11,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:11,462 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] [2021-12-22 13:46:11,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:11,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:11,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1175586544, now seen corresponding path program 4 times [2021-12-22 13:46:11,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:11,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148082080] [2021-12-22 13:46:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:11,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:11,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148082080] [2021-12-22 13:46:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148082080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:11,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:11,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:11,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378698073] [2021-12-22 13:46:11,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:11,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:11,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:11,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:11,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 259 transitions, 1736 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:11,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:11,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:11,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:11,944 INFO L129 PetriNetUnfolder]: 295/971 cut-off events. [2021-12-22 13:46:11,945 INFO L130 PetriNetUnfolder]: For 3657/3661 co-relation queries the response was YES. [2021-12-22 13:46:11,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 971 events. 295/971 cut-off events. For 3657/3661 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5764 event pairs, 94 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 3157. Up to 371 conditions per place. [2021-12-22 13:46:11,953 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 129 selfloop transitions, 29 changer transitions 9/291 dead transitions. [2021-12-22 13:46:11,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 2330 flow [2021-12-22 13:46:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:46:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:46:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2021-12-22 13:46:11,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2021-12-22 13:46:11,955 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2021-12-22 13:46:11,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2021-12-22 13:46:11,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:11,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2021-12-22 13:46:11,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 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) [2021-12-22 13:46:11,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:11,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:11,959 INFO L186 Difference]: Start difference. First operand has 225 places, 259 transitions, 1736 flow. Second operand 6 states and 876 transitions. [2021-12-22 13:46:11,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 2330 flow [2021-12-22 13:46:11,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 291 transitions, 2315 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:46:11,977 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 1794 flow [2021-12-22 13:46:11,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2021-12-22 13:46:11,978 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 82 predicate places. [2021-12-22 13:46:11,978 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 1794 flow [2021-12-22 13:46:11,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:11,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:11,979 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] [2021-12-22 13:46:11,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:46:11,979 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1649527968, now seen corresponding path program 4 times [2021-12-22 13:46:11,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317075907] [2021-12-22 13:46:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:11,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:12,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317075907] [2021-12-22 13:46:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317075907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:12,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:12,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:46:12,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415983466] [2021-12-22 13:46:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:12,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:46:12,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:46:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:46:12,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:12,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 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) [2021-12-22 13:46:12,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:12,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:12,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:12,227 INFO L129 PetriNetUnfolder]: 315/1013 cut-off events. [2021-12-22 13:46:12,227 INFO L130 PetriNetUnfolder]: For 3875/3875 co-relation queries the response was YES. [2021-12-22 13:46:12,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1013 events. 315/1013 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6061 event pairs, 89 based on Foata normal form. 5/1009 useless extension candidates. Maximal degree in co-relation 3360. Up to 271 conditions per place. [2021-12-22 13:46:12,236 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 126 selfloop transitions, 44 changer transitions 3/297 dead transitions. [2021-12-22 13:46:12,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 297 transitions, 2404 flow [2021-12-22 13:46:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:46:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:46:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 883 transitions. [2021-12-22 13:46:12,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919191919191919 [2021-12-22 13:46:12,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 883 transitions. [2021-12-22 13:46:12,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 883 transitions. [2021-12-22 13:46:12,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:12,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 883 transitions. [2021-12-22 13:46:12,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 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) [2021-12-22 13:46:12,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:12,242 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2021-12-22 13:46:12,242 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 1794 flow. Second operand 6 states and 883 transitions. [2021-12-22 13:46:12,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 297 transitions, 2404 flow [2021-12-22 13:46:12,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 297 transitions, 2308 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-12-22 13:46:12,286 INFO L242 Difference]: Finished difference. Result has 228 places, 264 transitions, 1902 flow [2021-12-22 13:46:12,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2021-12-22 13:46:12,287 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 80 predicate places. [2021-12-22 13:46:12,287 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 1902 flow [2021-12-22 13:46:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 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) [2021-12-22 13:46:12,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:12,288 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] [2021-12-22 13:46:12,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:46:12,288 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1931931080, now seen corresponding path program 5 times [2021-12-22 13:46:12,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:12,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246428659] [2021-12-22 13:46:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:12,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:46:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246428659] [2021-12-22 13:46:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246428659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:46:12,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:46:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:46:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662148316] [2021-12-22 13:46:12,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:46:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:46:12,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:46:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:46:12,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-12-22 13:46:12,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 1902 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:12,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:12,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-12-22 13:46:12,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:12,526 INFO L129 PetriNetUnfolder]: 304/936 cut-off events. [2021-12-22 13:46:12,526 INFO L130 PetriNetUnfolder]: For 3754/3754 co-relation queries the response was YES. [2021-12-22 13:46:12,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 936 events. 304/936 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5261 event pairs, 105 based on Foata normal form. 3/926 useless extension candidates. Maximal degree in co-relation 3205. Up to 340 conditions per place. [2021-12-22 13:46:12,535 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 34 changer transitions 8/282 dead transitions. [2021-12-22 13:46:12,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 282 transitions, 2349 flow [2021-12-22 13:46:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:46:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:46:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2021-12-22 13:46:12,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8860606060606061 [2021-12-22 13:46:12,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2021-12-22 13:46:12,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2021-12-22 13:46:12,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:12,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2021-12-22 13:46:12,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 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) [2021-12-22 13:46:12,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 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) [2021-12-22 13:46:12,540 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 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) [2021-12-22 13:46:12,540 INFO L186 Difference]: Start difference. First operand has 228 places, 264 transitions, 1902 flow. Second operand 5 states and 731 transitions. [2021-12-22 13:46:12,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 282 transitions, 2349 flow [2021-12-22 13:46:12,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 282 transitions, 2282 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-22 13:46:12,559 INFO L242 Difference]: Finished difference. Result has 231 places, 262 transitions, 1867 flow [2021-12-22 13:46:12,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1867, PETRI_PLACES=231, PETRI_TRANSITIONS=262} [2021-12-22 13:46:12,560 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 83 predicate places. [2021-12-22 13:46:12,560 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 262 transitions, 1867 flow [2021-12-22 13:46:12,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 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) [2021-12-22 13:46:12,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:12,560 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] [2021-12-22 13:46:12,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:46:12,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2021-12-22 13:46:12,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:12,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564510245] [2021-12-22 13:46:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:12,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:12,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564510245] [2021-12-22 13:46:12,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564510245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544112922] [2021-12-22 13:46:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:12,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:12,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:12,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:46:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 13:46:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:13,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-12-22 13:46:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:13,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:13,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2021-12-22 13:46:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544112922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:13,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2021-12-22 13:46:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367453972] [2021-12-22 13:46:13,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:46:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:46:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:46:13,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2021-12-22 13:46:13,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 262 transitions, 1867 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 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) [2021-12-22 13:46:13,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:13,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2021-12-22 13:46:13,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:14,367 INFO L129 PetriNetUnfolder]: 779/2818 cut-off events. [2021-12-22 13:46:14,367 INFO L130 PetriNetUnfolder]: For 9441/9639 co-relation queries the response was YES. [2021-12-22 13:46:14,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2818 events. 779/2818 cut-off events. For 9441/9639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23922 event pairs, 94 based on Foata normal form. 46/2799 useless extension candidates. Maximal degree in co-relation 8693. Up to 474 conditions per place. [2021-12-22 13:46:14,401 INFO L132 encePairwiseOnDemand]: 144/165 looper letters, 100 selfloop transitions, 33 changer transitions 10/342 dead transitions. [2021-12-22 13:46:14,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 342 transitions, 2370 flow [2021-12-22 13:46:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:46:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:46:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2141 transitions. [2021-12-22 13:46:14,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5898071625344352 [2021-12-22 13:46:14,407 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2141 transitions. [2021-12-22 13:46:14,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2141 transitions. [2021-12-22 13:46:14,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:14,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2141 transitions. [2021-12-22 13:46:14,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.31818181818181) internal successors, (2141), 22 states have internal predecessors, (2141), 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) [2021-12-22 13:46:14,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 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) [2021-12-22 13:46:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 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) [2021-12-22 13:46:14,420 INFO L186 Difference]: Start difference. First operand has 231 places, 262 transitions, 1867 flow. Second operand 22 states and 2141 transitions. [2021-12-22 13:46:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 342 transitions, 2370 flow [2021-12-22 13:46:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 2141 flow, removed 8 selfloop flow, removed 17 redundant places. [2021-12-22 13:46:14,468 INFO L242 Difference]: Finished difference. Result has 242 places, 283 transitions, 1858 flow [2021-12-22 13:46:14,469 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1858, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2021-12-22 13:46:14,469 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 94 predicate places. [2021-12-22 13:46:14,469 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 1858 flow [2021-12-22 13:46:14,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 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) [2021-12-22 13:46:14,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:14,470 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] [2021-12-22 13:46:14,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:14,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:46:14,691 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1958640954, now seen corresponding path program 2 times [2021-12-22 13:46:14,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888139809] [2021-12-22 13:46:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:14,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:14,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888139809] [2021-12-22 13:46:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888139809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792286685] [2021-12-22 13:46:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:46:14,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:14,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:14,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:46:14,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:46:14,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 13:46:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:15,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-12-22 13:46:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:15,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:15,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2021-12-22 13:46:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:46:15,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792286685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:15,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:15,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2021-12-22 13:46:15,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395493870] [2021-12-22 13:46:15,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:15,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:46:15,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:46:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:46:15,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2021-12-22 13:46:15,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 1858 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 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) [2021-12-22 13:46:15,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:15,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2021-12-22 13:46:15,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:17,059 INFO L129 PetriNetUnfolder]: 2049/7109 cut-off events. [2021-12-22 13:46:17,059 INFO L130 PetriNetUnfolder]: For 17713/18335 co-relation queries the response was YES. [2021-12-22 13:46:17,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23040 conditions, 7109 events. 2049/7109 cut-off events. For 17713/18335 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 73448 event pairs, 182 based on Foata normal form. 156/7144 useless extension candidates. Maximal degree in co-relation 22948. Up to 1105 conditions per place. [2021-12-22 13:46:17,124 INFO L132 encePairwiseOnDemand]: 147/165 looper letters, 103 selfloop transitions, 40 changer transitions 14/356 dead transitions. [2021-12-22 13:46:17,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 356 transitions, 2518 flow [2021-12-22 13:46:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:46:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:46:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1935 transitions. [2021-12-22 13:46:17,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2021-12-22 13:46:17,127 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1935 transitions. [2021-12-22 13:46:17,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1935 transitions. [2021-12-22 13:46:17,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:17,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1935 transitions. [2021-12-22 13:46:17,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.75) internal successors, (1935), 20 states have internal predecessors, (1935), 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) [2021-12-22 13:46:17,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 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) [2021-12-22 13:46:17,134 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 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) [2021-12-22 13:46:17,134 INFO L186 Difference]: Start difference. First operand has 242 places, 283 transitions, 1858 flow. Second operand 20 states and 1935 transitions. [2021-12-22 13:46:17,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 356 transitions, 2518 flow [2021-12-22 13:46:17,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 356 transitions, 2428 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-12-22 13:46:17,313 INFO L242 Difference]: Finished difference. Result has 262 places, 306 transitions, 2113 flow [2021-12-22 13:46:17,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2113, PETRI_PLACES=262, PETRI_TRANSITIONS=306} [2021-12-22 13:46:17,314 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 114 predicate places. [2021-12-22 13:46:17,314 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 306 transitions, 2113 flow [2021-12-22 13:46:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 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) [2021-12-22 13:46:17,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:17,316 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:17,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:17,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:46:17,579 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:17,580 INFO L85 PathProgramCache]: Analyzing trace with hash 440836057, now seen corresponding path program 3 times [2021-12-22 13:46:17,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:17,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37589894] [2021-12-22 13:46:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:17,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:46:17,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37589894] [2021-12-22 13:46:18,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37589894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:18,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77573425] [2021-12-22 13:46:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:18,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:18,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:18,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:46:18,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 13:46:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-22 13:46:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:18,911 INFO L387 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 [2021-12-22 13:46:19,259 INFO L387 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 [2021-12-22 13:46:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:46:19,506 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-22 13:46:19,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2021-12-22 13:46:19,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-22 13:46:19,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 13:46:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:46:19,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:19,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_418) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2021-12-22 13:46:20,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:46:20,472 INFO L387 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 157 treesize of output 97 [2021-12-22 13:46:20,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:46:20,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 326 [2021-12-22 13:46:20,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:46:20,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 307 treesize of output 283 [2021-12-22 13:46:20,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:46:20,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 110 [2021-12-22 13:46:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:46:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77573425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:22,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:22,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2021-12-22 13:46:22,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343539918] [2021-12-22 13:46:22,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:22,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-22 13:46:22,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-22 13:46:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2266, Unknown=16, NotChecked=98, Total=2652 [2021-12-22 13:46:22,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2021-12-22 13:46:22,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 2113 flow. Second operand has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 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) [2021-12-22 13:46:22,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:22,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2021-12-22 13:46:22,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:27,765 INFO L129 PetriNetUnfolder]: 2040/7243 cut-off events. [2021-12-22 13:46:27,765 INFO L130 PetriNetUnfolder]: For 19309/20143 co-relation queries the response was YES. [2021-12-22 13:46:27,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 7243 events. 2040/7243 cut-off events. For 19309/20143 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 77345 event pairs, 230 based on Foata normal form. 211/7321 useless extension candidates. Maximal degree in co-relation 23672. Up to 1351 conditions per place. [2021-12-22 13:46:27,822 INFO L132 encePairwiseOnDemand]: 132/165 looper letters, 118 selfloop transitions, 69 changer transitions 4/373 dead transitions. [2021-12-22 13:46:27,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 373 transitions, 2829 flow [2021-12-22 13:46:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-22 13:46:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-22 13:46:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2584 transitions. [2021-12-22 13:46:27,827 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4474458874458874 [2021-12-22 13:46:27,827 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2584 transitions. [2021-12-22 13:46:27,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2584 transitions. [2021-12-22 13:46:27,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:27,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2584 transitions. [2021-12-22 13:46:27,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.82857142857142) internal successors, (2584), 35 states have internal predecessors, (2584), 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) [2021-12-22 13:46:27,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 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) [2021-12-22 13:46:27,838 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 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) [2021-12-22 13:46:27,839 INFO L186 Difference]: Start difference. First operand has 262 places, 306 transitions, 2113 flow. Second operand 35 states and 2584 transitions. [2021-12-22 13:46:27,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 373 transitions, 2829 flow [2021-12-22 13:46:27,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 373 transitions, 2759 flow, removed 22 selfloop flow, removed 11 redundant places. [2021-12-22 13:46:27,996 INFO L242 Difference]: Finished difference. Result has 289 places, 344 transitions, 2525 flow [2021-12-22 13:46:27,996 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2525, PETRI_PLACES=289, PETRI_TRANSITIONS=344} [2021-12-22 13:46:27,997 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 141 predicate places. [2021-12-22 13:46:27,997 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 344 transitions, 2525 flow [2021-12-22 13:46:27,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 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) [2021-12-22 13:46:27,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:27,998 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:28,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:28,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:46:28,221 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 488371445, now seen corresponding path program 4 times [2021-12-22 13:46:28,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:28,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153918950] [2021-12-22 13:46:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:28,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:28,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153918950] [2021-12-22 13:46:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153918950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968267410] [2021-12-22 13:46:28,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:46:28,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:28,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:28,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:46:28,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:46:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:46:28,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:28,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 13:46:29,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968267410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:29,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:29,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-22 13:46:29,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857338939] [2021-12-22 13:46:29,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 13:46:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 13:46:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:46:29,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-12-22 13:46:29,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 344 transitions, 2525 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 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) [2021-12-22 13:46:29,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:29,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-12-22 13:46:29,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:32,647 INFO L129 PetriNetUnfolder]: 6961/18071 cut-off events. [2021-12-22 13:46:32,647 INFO L130 PetriNetUnfolder]: For 56372/57186 co-relation queries the response was YES. [2021-12-22 13:46:32,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67113 conditions, 18071 events. 6961/18071 cut-off events. For 56372/57186 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 191900 event pairs, 1163 based on Foata normal form. 144/18072 useless extension candidates. Maximal degree in co-relation 66922. Up to 4138 conditions per place. [2021-12-22 13:46:32,918 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 686 selfloop transitions, 206 changer transitions 0/1043 dead transitions. [2021-12-22 13:46:32,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1043 transitions, 10355 flow [2021-12-22 13:46:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-22 13:46:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-22 13:46:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7023 transitions. [2021-12-22 13:46:32,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512727272727273 [2021-12-22 13:46:32,929 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7023 transitions. [2021-12-22 13:46:32,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7023 transitions. [2021-12-22 13:46:32,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:32,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7023 transitions. [2021-12-22 13:46:32,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.46) internal successors, (7023), 50 states have internal predecessors, (7023), 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) [2021-12-22 13:46:32,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 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) [2021-12-22 13:46:32,951 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 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) [2021-12-22 13:46:32,951 INFO L186 Difference]: Start difference. First operand has 289 places, 344 transitions, 2525 flow. Second operand 50 states and 7023 transitions. [2021-12-22 13:46:32,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1043 transitions, 10355 flow [2021-12-22 13:46:33,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1043 transitions, 10247 flow, removed 31 selfloop flow, removed 19 redundant places. [2021-12-22 13:46:33,379 INFO L242 Difference]: Finished difference. Result has 334 places, 521 transitions, 4288 flow [2021-12-22 13:46:33,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4288, PETRI_PLACES=334, PETRI_TRANSITIONS=521} [2021-12-22 13:46:33,380 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 186 predicate places. [2021-12-22 13:46:33,381 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 521 transitions, 4288 flow [2021-12-22 13:46:33,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 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) [2021-12-22 13:46:33,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:33,382 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:33,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:33,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:46:33,607 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1652934215, now seen corresponding path program 5 times [2021-12-22 13:46:33,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48064683] [2021-12-22 13:46:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:33,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:33,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48064683] [2021-12-22 13:46:33,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48064683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031648143] [2021-12-22 13:46:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:46:33,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:33,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:33,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:46:33,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-22 13:46:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:46:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:34,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:34,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031648143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:34,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:34,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-22 13:46:34,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300514057] [2021-12-22 13:46:34,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:34,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 13:46:34,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 13:46:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:46:34,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-12-22 13:46:34,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 521 transitions, 4288 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 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) [2021-12-22 13:46:34,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:34,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-12-22 13:46:34,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:39,724 INFO L129 PetriNetUnfolder]: 9379/24427 cut-off events. [2021-12-22 13:46:39,724 INFO L130 PetriNetUnfolder]: For 118641/119688 co-relation queries the response was YES. [2021-12-22 13:46:39,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110731 conditions, 24427 events. 9379/24427 cut-off events. For 118641/119688 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 273536 event pairs, 1010 based on Foata normal form. 114/24386 useless extension candidates. Maximal degree in co-relation 105186. Up to 4140 conditions per place. [2021-12-22 13:46:40,054 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 771 selfloop transitions, 330 changer transitions 0/1252 dead transitions. [2021-12-22 13:46:40,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1252 transitions, 13360 flow [2021-12-22 13:46:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-22 13:46:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-22 13:46:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7444 transitions. [2021-12-22 13:46:40,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512292738707833 [2021-12-22 13:46:40,073 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7444 transitions. [2021-12-22 13:46:40,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7444 transitions. [2021-12-22 13:46:40,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:40,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7444 transitions. [2021-12-22 13:46:40,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 140.45283018867926) internal successors, (7444), 53 states have internal predecessors, (7444), 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) [2021-12-22 13:46:40,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 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) [2021-12-22 13:46:40,101 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 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) [2021-12-22 13:46:40,101 INFO L186 Difference]: Start difference. First operand has 334 places, 521 transitions, 4288 flow. Second operand 53 states and 7444 transitions. [2021-12-22 13:46:40,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1252 transitions, 13360 flow [2021-12-22 13:46:41,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1252 transitions, 13316 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-12-22 13:46:41,631 INFO L242 Difference]: Finished difference. Result has 402 places, 667 transitions, 6484 flow [2021-12-22 13:46:41,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6484, PETRI_PLACES=402, PETRI_TRANSITIONS=667} [2021-12-22 13:46:41,632 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 254 predicate places. [2021-12-22 13:46:41,632 INFO L470 AbstractCegarLoop]: Abstraction has has 402 places, 667 transitions, 6484 flow [2021-12-22 13:46:41,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 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) [2021-12-22 13:46:41,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:41,633 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:41,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-22 13:46:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:41,856 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2059831979, now seen corresponding path program 6 times [2021-12-22 13:46:41,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999680082] [2021-12-22 13:46:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:41,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:41,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999680082] [2021-12-22 13:46:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999680082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044654042] [2021-12-22 13:46:41,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:46:41,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:41,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:41,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:46:42,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-22 13:46:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:46:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:42,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044654042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:42,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:42,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-22 13:46:42,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155522236] [2021-12-22 13:46:42,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:42,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 13:46:42,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 13:46:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:46:42,631 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-12-22 13:46:42,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 667 transitions, 6484 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 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) [2021-12-22 13:46:42,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:42,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-12-22 13:46:42,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:49,051 INFO L129 PetriNetUnfolder]: 9406/25693 cut-off events. [2021-12-22 13:46:49,052 INFO L130 PetriNetUnfolder]: For 202710/203851 co-relation queries the response was YES. [2021-12-22 13:46:49,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134689 conditions, 25693 events. 9406/25693 cut-off events. For 202710/203851 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 298880 event pairs, 2067 based on Foata normal form. 65/25508 useless extension candidates. Maximal degree in co-relation 128720. Up to 13999 conditions per place. [2021-12-22 13:46:49,391 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 574 selfloop transitions, 159 changer transitions 10/894 dead transitions. [2021-12-22 13:46:49,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 894 transitions, 10166 flow [2021-12-22 13:46:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:46:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:46:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2021-12-22 13:46:49,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2021-12-22 13:46:49,396 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2021-12-22 13:46:49,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2021-12-22 13:46:49,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:49,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2021-12-22 13:46:49,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 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) [2021-12-22 13:46:49,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 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) [2021-12-22 13:46:49,496 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 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) [2021-12-22 13:46:49,496 INFO L186 Difference]: Start difference. First operand has 402 places, 667 transitions, 6484 flow. Second operand 24 states and 3343 transitions. [2021-12-22 13:46:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 894 transitions, 10166 flow [2021-12-22 13:46:52,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 894 transitions, 10024 flow, removed 47 selfloop flow, removed 5 redundant places. [2021-12-22 13:46:52,282 INFO L242 Difference]: Finished difference. Result has 430 places, 712 transitions, 7280 flow [2021-12-22 13:46:52,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7280, PETRI_PLACES=430, PETRI_TRANSITIONS=712} [2021-12-22 13:46:52,283 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 282 predicate places. [2021-12-22 13:46:52,283 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 712 transitions, 7280 flow [2021-12-22 13:46:52,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 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) [2021-12-22 13:46:52,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:52,284 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:52,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:52,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-22 13:46:52,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1726535893, now seen corresponding path program 7 times [2021-12-22 13:46:52,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:52,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984345302] [2021-12-22 13:46:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:52,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:52,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:52,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984345302] [2021-12-22 13:46:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984345302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840093621] [2021-12-22 13:46:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:46:52,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:52,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:52,591 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:46:52,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:46:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:52,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:46:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:53,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:46:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:46:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840093621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:46:53,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:46:53,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-22 13:46:53,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915672956] [2021-12-22 13:46:53,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:46:53,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 13:46:53,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:46:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 13:46:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:46:53,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-12-22 13:46:53,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 712 transitions, 7280 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 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) [2021-12-22 13:46:53,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:46:53,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-12-22 13:46:53,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand