./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-5.i --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/pthread-deagle/floating_read-5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:51:56,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:51:56,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:51:56,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:51:56,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:51:56,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:51:57,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:51:57,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:51:57,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:51:57,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:51:57,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:51:57,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:51:57,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:51:57,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:51:57,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:51:57,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:51:57,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:51:57,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:51:57,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:51:57,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:51:57,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:51:57,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:51:57,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:51:57,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:51:57,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:51:57,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:51:57,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:51:57,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:51:57,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:51:57,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:51:57,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:51:57,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:51:57,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:51:57,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:51:57,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:51:57,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:51:57,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:51:57,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:51:57,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:51:57,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:51:57,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:51:57,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:51:57,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:51:57,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:51:57,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:51:57,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:51:57,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:51:57,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:51:57,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:51:57,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:51:57,058 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:51:57,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:51:57,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:51:57,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:51:57,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:51:57,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:51:57,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:51:57,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:51:57,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:51:57,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:51:57,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:51:57,062 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:51:57,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:51:57,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:51:57,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d [2021-12-22 13:51:57,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:51:57,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:51:57,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:51:57,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:51:57,305 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:51:57,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-12-22 13:51:57,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f99ad12/8e6df9f91025451c98e5680e4745828e/FLAGc7e6926fb [2021-12-22 13:51:57,758 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:51:57,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-12-22 13:51:57,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f99ad12/8e6df9f91025451c98e5680e4745828e/FLAGc7e6926fb [2021-12-22 13:51:58,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f99ad12/8e6df9f91025451c98e5680e4745828e [2021-12-22 13:51:58,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:51:58,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:51:58,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:51:58,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:51:58,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:51:58,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264f965f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58, skipping insertion in model container [2021-12-22 13:51:58,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:51:58,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:51:58,405 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-22 13:51:58,412 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-12-22 13:51:58,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:51:58,426 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:51:58,457 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-22 13:51:58,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-12-22 13:51:58,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:51:58,489 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:51:58,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58 WrapperNode [2021-12-22 13:51:58,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:51:58,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:51:58,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:51:58,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:51:58,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,517 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-22 13:51:58,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:51:58,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:51:58,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:51:58,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:51:58,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:51:58,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:51:58,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:51:58,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:51:58,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (1/1) ... [2021-12-22 13:51:58,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:51:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:58,565 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 13:51:58,572 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 13:51:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:51:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:51:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-12-22 13:51:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:51:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:51:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:51:58,596 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 13:51:58,663 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:51:58,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:51:58,754 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:51:58,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:51:58,758 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:51:58,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:51:58 BoogieIcfgContainer [2021-12-22 13:51:58,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:51:58,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:51:58,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:51:58,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:51:58,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:51:58" (1/3) ... [2021-12-22 13:51:58,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d161baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:51:58, skipping insertion in model container [2021-12-22 13:51:58,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:58" (2/3) ... [2021-12-22 13:51:58,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d161baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:51:58, skipping insertion in model container [2021-12-22 13:51:58,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:51:58" (3/3) ... [2021-12-22 13:51:58,766 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-5.i [2021-12-22 13:51:58,769 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:51:58,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:51:58,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:51:58,769 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:51:58,789 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,789 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,789 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,790 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,790 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,790 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,790 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,790 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,791 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,791 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,791 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,791 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,791 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,792 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,794 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,794 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,794 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,795 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,795 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,795 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,797 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,798 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,798 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,798 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,798 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:58,801 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-22 13:51:58,843 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:58,849 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 13:51:58,850 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:58,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2021-12-22 13:51:58,905 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2021-12-22 13:51:58,905 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-22 13:51:58,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2021-12-22 13:51:58,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2021-12-22 13:51:58,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2021-12-22 13:51:58,919 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-22 13:51:58,920 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:58,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:58,921 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] [2021-12-22 13:51:58,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2021-12-22 13:51:58,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:58,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932161371] [2021-12-22 13:51:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:58,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,111 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 13:51:59,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932161371] [2021-12-22 13:51:59,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932161371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:59,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:59,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:51:59,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372645250] [2021-12-22 13:51:59,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:51:59,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:51:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:51:59,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2021-12-22 13:51:59,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 13:51:59,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2021-12-22 13:51:59,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:59,196 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-12-22 13:51:59,196 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-22 13:51:59,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-12-22 13:51:59,197 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2021-12-22 13:51:59,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2021-12-22 13:51:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:51:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:51:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2021-12-22 13:51:59,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2021-12-22 13:51:59,209 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2021-12-22 13:51:59,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2021-12-22 13:51:59,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:59,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2021-12-22 13:51:59,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 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 13:51:59,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 13:51:59,222 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 13:51:59,223 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2021-12-22 13:51:59,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2021-12-22 13:51:59,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:59,227 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2021-12-22 13:51:59,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2021-12-22 13:51:59,231 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2021-12-22 13:51:59,232 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2021-12-22 13:51:59,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 13:51:59,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,233 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] [2021-12-22 13:51:59,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:51:59,234 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2021-12-22 13:51:59,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068651454] [2021-12-22 13:51:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,291 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 13:51:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068651454] [2021-12-22 13:51:59,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068651454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:59,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:59,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:59,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806981492] [2021-12-22 13:51:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:59,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:59,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2021-12-22 13:51:59,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 13:51:59,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2021-12-22 13:51:59,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:59,312 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-22 13:51:59,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:59,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-22 13:51:59,313 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2021-12-22 13:51:59,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2021-12-22 13:51:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2021-12-22 13:51:59,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2021-12-22 13:51:59,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2021-12-22 13:51:59,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2021-12-22 13:51:59,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:59,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2021-12-22 13:51:59,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 13:51:59,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 13:51:59,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 13:51:59,318 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2021-12-22 13:51:59,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2021-12-22 13:51:59,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:59,320 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2021-12-22 13:51:59,320 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-12-22 13:51:59,321 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2021-12-22 13:51:59,321 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2021-12-22 13:51:59,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 13:51:59,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,321 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] [2021-12-22 13:51:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:51:59,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2021-12-22 13:51:59,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474145129] [2021-12-22 13:51:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:59,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474145129] [2021-12-22 13:51:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474145129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:59,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:59,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:59,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510760975] [2021-12-22 13:51:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:59,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:59,398 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2021-12-22 13:51:59,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 13:51:59,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2021-12-22 13:51:59,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:59,411 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-22 13:51:59,411 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:51:59,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-12-22 13:51:59,412 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2021-12-22 13:51:59,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2021-12-22 13:51:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2021-12-22 13:51:59,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2021-12-22 13:51:59,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2021-12-22 13:51:59,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2021-12-22 13:51:59,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:59,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2021-12-22 13:51:59,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 13:51:59,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 13:51:59,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 13:51:59,417 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2021-12-22 13:51:59,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2021-12-22 13:51:59,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:51:59,419 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2021-12-22 13:51:59,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-12-22 13:51:59,419 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2021-12-22 13:51:59,420 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2021-12-22 13:51:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 13:51:59,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,420 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:51:59,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2021-12-22 13:51:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130957973] [2021-12-22 13:51:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:59,450 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:51:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:59,476 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:51:59,476 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:51:59,477 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:51:59,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:51:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:51:59,481 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-22 13:51:59,482 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:51:59,482 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-12-22 13:51:59,489 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,490 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,490 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,490 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,490 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,490 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,491 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,492 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,493 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,494 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,495 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,496 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,496 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,496 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,496 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,497 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,497 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,497 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,497 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,497 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,498 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,498 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,498 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:59,499 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:51:59,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:59,501 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 13:51:59,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:59,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2021-12-22 13:51:59,514 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2021-12-22 13:51:59,514 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-22 13:51:59,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2021-12-22 13:51:59,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2021-12-22 13:51:59,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2021-12-22 13:51:59,518 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:51:59,518 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:59,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,518 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] [2021-12-22 13:51:59,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2021-12-22 13:51:59,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843807342] [2021-12-22 13:51:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,540 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 13:51:59,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843807342] [2021-12-22 13:51:59,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843807342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:59,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404999743] [2021-12-22 13:51:59,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:59,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:59,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2021-12-22 13:51:59,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 13:51:59,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2021-12-22 13:51:59,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:59,559 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2021-12-22 13:51:59,560 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:51:59,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-12-22 13:51:59,560 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2021-12-22 13:51:59,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 136 flow [2021-12-22 13:51:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2021-12-22 13:51:59,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535353535353535 [2021-12-22 13:51:59,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2021-12-22 13:51:59,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2021-12-22 13:51:59,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:59,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2021-12-22 13:51:59,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 13:51:59,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:59,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:59,565 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 3 states and 169 transitions. [2021-12-22 13:51:59,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 136 flow [2021-12-22 13:51:59,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 134 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:59,566 INFO L242 Difference]: Finished difference. Result has 53 places, 46 transitions, 112 flow [2021-12-22 13:51:59,566 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2021-12-22 13:51:59,567 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2021-12-22 13:51:59,567 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 112 flow [2021-12-22 13:51:59,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 13:51:59,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,568 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] [2021-12-22 13:51:59,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:51:59,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2021-12-22 13:51:59,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769563715] [2021-12-22 13:51:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:59,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769563715] [2021-12-22 13:51:59,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769563715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:59,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:59,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:59,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849641249] [2021-12-22 13:51:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:59,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:59,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2021-12-22 13:51:59,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:51:59,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2021-12-22 13:51:59,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:59,642 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2021-12-22 13:51:59,646 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:51:59,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 84. Up to 13 conditions per place. [2021-12-22 13:51:59,651 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2021-12-22 13:51:59,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 143 flow [2021-12-22 13:51:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2021-12-22 13:51:59,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-12-22 13:51:59,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2021-12-22 13:51:59,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2021-12-22 13:51:59,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:59,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2021-12-22 13:51:59,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 13:51:59,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:59,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:59,660 INFO L186 Difference]: Start difference. First operand has 53 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2021-12-22 13:51:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 143 flow [2021-12-22 13:51:59,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:59,662 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 129 flow [2021-12-22 13:51:59,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2021-12-22 13:51:59,662 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2021-12-22 13:51:59,663 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 129 flow [2021-12-22 13:51:59,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 13:51:59,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:59,663 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] [2021-12-22 13:51:59,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:51:59,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2021-12-22 13:51:59,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504021340] [2021-12-22 13:51:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,704 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 13:51:59,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504021340] [2021-12-22 13:51:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504021340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994702880] [2021-12-22 13:51:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:59,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:59,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:59,707 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 13:51:59,708 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 13:51:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:51:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:59,885 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 13:51:59,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:59,990 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 13:51:59,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994702880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:59,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:59,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:51:59,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122626216] [2021-12-22 13:51:59,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:59,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:51:59,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:51:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:51:59,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2021-12-22 13:51:59,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 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 13:51:59,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:59,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2021-12-22 13:51:59,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,048 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-12-22 13:52:00,049 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:52:00,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 37. Up to 5 conditions per place. [2021-12-22 13:52:00,049 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2021-12-22 13:52:00,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 163 flow [2021-12-22 13:52:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2021-12-22 13:52:00,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-12-22 13:52:00,052 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2021-12-22 13:52:00,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2021-12-22 13:52:00,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2021-12-22 13:52:00,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:52:00,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 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 13:52:00,057 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 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 13:52:00,058 INFO L186 Difference]: Start difference. First operand has 55 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2021-12-22 13:52:00,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 163 flow [2021-12-22 13:52:00,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:00,062 INFO L242 Difference]: Finished difference. Result has 59 places, 47 transitions, 134 flow [2021-12-22 13:52:00,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2021-12-22 13:52:00,063 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2021-12-22 13:52:00,063 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 134 flow [2021-12-22 13:52:00,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 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 13:52:00,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,063 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-12-22 13:52:00,094 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 13:52:00,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:00,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2021-12-22 13:52:00,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600558593] [2021-12-22 13:52:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:00,290 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:00,303 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:00,303 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:00,303 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:00,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:00,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:52:00,304 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-22 13:52:00,305 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:00,305 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-12-22 13:52:00,311 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,311 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,311 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,311 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,312 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,313 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,314 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,315 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,316 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,317 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,318 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,319 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,319 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,320 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,321 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,322 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,322 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,322 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,323 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-22 13:52:00,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:00,327 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 13:52:00,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:00,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2021-12-22 13:52:00,345 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2021-12-22 13:52:00,346 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-12-22 13:52:00,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 498 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2021-12-22 13:52:00,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2021-12-22 13:52:00,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2021-12-22 13:52:00,349 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-22 13:52:00,349 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:00,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,349 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] [2021-12-22 13:52:00,349 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash 898626907, now seen corresponding path program 1 times [2021-12-22 13:52:00,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96802921] [2021-12-22 13:52:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,361 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 13:52:00,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96802921] [2021-12-22 13:52:00,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96802921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:52:00,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660685496] [2021-12-22 13:52:00,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:52:00,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:52:00,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:52:00,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 73 [2021-12-22 13:52:00,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 13:52:00,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 73 [2021-12-22 13:52:00,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,372 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-12-22 13:52:00,372 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-22 13:52:00,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 82 events. 0/82 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-12-22 13:52:00,373 INFO L132 encePairwiseOnDemand]: 72/73 looper letters, 3 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2021-12-22 13:52:00,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 129 flow [2021-12-22 13:52:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:52:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:52:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 130 transitions. [2021-12-22 13:52:00,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2021-12-22 13:52:00,374 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 130 transitions. [2021-12-22 13:52:00,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 130 transitions. [2021-12-22 13:52:00,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 130 transitions. [2021-12-22 13:52:00,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 13:52:00,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 13:52:00,376 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 13:52:00,376 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 2 states and 130 transitions. [2021-12-22 13:52:00,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 129 flow [2021-12-22 13:52:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 123 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:00,377 INFO L242 Difference]: Finished difference. Result has 59 places, 51 transitions, 117 flow [2021-12-22 13:52:00,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=117, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2021-12-22 13:52:00,378 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2021-12-22 13:52:00,378 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 117 flow [2021-12-22 13:52:00,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 13:52:00,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,379 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] [2021-12-22 13:52:00,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:52:00,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2021-12-22 13:52:00,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998471315] [2021-12-22 13:52:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,394 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 13:52:00,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998471315] [2021-12-22 13:52:00,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998471315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:00,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785575418] [2021-12-22 13:52:00,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:00,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:00,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-22 13:52:00,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 13:52:00,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-22 13:52:00,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,424 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2021-12-22 13:52:00,425 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:52:00,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 79 events. 0/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-22 13:52:00,425 INFO L132 encePairwiseOnDemand]: 70/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2021-12-22 13:52:00,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 153 flow [2021-12-22 13:52:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-22 13:52:00,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-22 13:52:00,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 13:52:00,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 13:52:00,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 13:52:00,428 INFO L186 Difference]: Start difference. First operand has 59 places, 51 transitions, 117 flow. Second operand 3 states and 183 transitions. [2021-12-22 13:52:00,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 153 flow [2021-12-22 13:52:00,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:00,431 INFO L242 Difference]: Finished difference. Result has 62 places, 52 transitions, 129 flow [2021-12-22 13:52:00,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2021-12-22 13:52:00,431 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2021-12-22 13:52:00,432 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 129 flow [2021-12-22 13:52:00,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 13:52:00,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:52:00,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2021-12-22 13:52:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771260346] [2021-12-22 13:52:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:00,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771260346] [2021-12-22 13:52:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771260346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:00,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321617458] [2021-12-22 13:52:00,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:00,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:00,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-22 13:52:00,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 13:52:00,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-22 13:52:00,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,473 INFO L129 PetriNetUnfolder]: 21/177 cut-off events. [2021-12-22 13:52:00,474 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-22 13:52:00,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 177 events. 21/177 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 8 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 262. Up to 44 conditions per place. [2021-12-22 13:52:00,475 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2021-12-22 13:52:00,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 177 flow [2021-12-22 13:52:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-22 13:52:00,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-22 13:52:00,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-22 13:52:00,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 13:52:00,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 13:52:00,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 13:52:00,478 INFO L186 Difference]: Start difference. First operand has 62 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2021-12-22 13:52:00,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 177 flow [2021-12-22 13:52:00,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:00,479 INFO L242 Difference]: Finished difference. Result has 64 places, 55 transitions, 153 flow [2021-12-22 13:52:00,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2021-12-22 13:52:00,480 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2021-12-22 13:52:00,480 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 153 flow [2021-12-22 13:52:00,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 13:52:00,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,480 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] [2021-12-22 13:52:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:52:00,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2021-12-22 13:52:00,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526544371] [2021-12-22 13:52:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,512 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 13:52:00,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526544371] [2021-12-22 13:52:00,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526544371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:00,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176011470] [2021-12-22 13:52:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:00,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:00,514 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 13:52:00,515 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 13:52:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:00,635 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 13:52:00,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:00,698 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 13:52:00,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176011470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:00,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:00,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:00,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257504670] [2021-12-22 13:52:00,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:00,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:00,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2021-12-22 13:52:00,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 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 13:52:00,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2021-12-22 13:52:00,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,755 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2021-12-22 13:52:00,755 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:52:00,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 231 event pairs, 6 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 184. Up to 29 conditions per place. [2021-12-22 13:52:00,756 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2021-12-22 13:52:00,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 219 flow [2021-12-22 13:52:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-12-22 13:52:00,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2021-12-22 13:52:00,758 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-12-22 13:52:00,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-12-22 13:52:00,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-12-22 13:52:00,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 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 13:52:00,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 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 13:52:00,760 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 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 13:52:00,760 INFO L186 Difference]: Start difference. First operand has 64 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2021-12-22 13:52:00,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 219 flow [2021-12-22 13:52:00,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:00,762 INFO L242 Difference]: Finished difference. Result has 74 places, 61 transitions, 199 flow [2021-12-22 13:52:00,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2021-12-22 13:52:00,763 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2021-12-22 13:52:00,763 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 199 flow [2021-12-22 13:52:00,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 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 13:52:00,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,764 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:00,783 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 13:52:00,979 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,SelfDestructingSolverStorable11 [2021-12-22 13:52:00,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2021-12-22 13:52:00,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471824728] [2021-12-22 13:52:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:00,993 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:01,006 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:01,006 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:01,006 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:01,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:01,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:52:01,007 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-22 13:52:01,007 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:01,007 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-12-22 13:52:01,013 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,014 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,015 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,016 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,017 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,018 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,019 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,020 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,021 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,022 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,026 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,027 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,027 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:01,028 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-22 13:52:01,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:01,030 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 13:52:01,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:01,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2021-12-22 13:52:01,049 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2021-12-22 13:52:01,050 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-12-22 13:52:01,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1165 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2021-12-22 13:52:01,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2021-12-22 13:52:01,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2021-12-22 13:52:01,053 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:52:01,053 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:01,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:01,053 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] [2021-12-22 13:52:01,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2021-12-22 13:52:01,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:01,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882570002] [2021-12-22 13:52:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,069 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 13:52:01,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:01,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882570002] [2021-12-22 13:52:01,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882570002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:01,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:01,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:01,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362034355] [2021-12-22 13:52:01,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:01,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:01,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:01,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:01,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:01,071 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2021-12-22 13:52:01,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 13:52:01,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:01,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2021-12-22 13:52:01,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:01,091 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2021-12-22 13:52:01,091 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-22 13:52:01,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-12-22 13:52:01,092 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2021-12-22 13:52:01,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2021-12-22 13:52:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2021-12-22 13:52:01,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8375 [2021-12-22 13:52:01,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2021-12-22 13:52:01,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2021-12-22 13:52:01,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:01,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2021-12-22 13:52:01,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 13:52:01,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:52:01,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:52:01,094 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2021-12-22 13:52:01,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2021-12-22 13:52:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:01,096 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2021-12-22 13:52:01,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2021-12-22 13:52:01,097 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2021-12-22 13:52:01,097 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2021-12-22 13:52:01,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 13:52:01,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:01,097 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] [2021-12-22 13:52:01,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:52:01,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2021-12-22 13:52:01,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:01,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046054561] [2021-12-22 13:52:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046054561] [2021-12-22 13:52:01,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046054561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:01,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:01,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:01,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907279175] [2021-12-22 13:52:01,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:01,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:01,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:01,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-22 13:52:01,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 13:52:01,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:01,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-22 13:52:01,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:01,158 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2021-12-22 13:52:01,158 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-12-22 13:52:01,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1623 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2021-12-22 13:52:01,160 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2021-12-22 13:52:01,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2021-12-22 13:52:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2021-12-22 13:52:01,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2021-12-22 13:52:01,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2021-12-22 13:52:01,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2021-12-22 13:52:01,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:01,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2021-12-22 13:52:01,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 13:52:01,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:52:01,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:52:01,163 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2021-12-22 13:52:01,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2021-12-22 13:52:01,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:01,165 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2021-12-22 13:52:01,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2021-12-22 13:52:01,166 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2021-12-22 13:52:01,166 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2021-12-22 13:52:01,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 13:52:01,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:01,167 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] [2021-12-22 13:52:01,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:52:01,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2021-12-22 13:52:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468265005] [2021-12-22 13:52:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,206 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 13:52:01,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468265005] [2021-12-22 13:52:01,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468265005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130232328] [2021-12-22 13:52:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:01,208 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 13:52:01,209 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 13:52:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:01,327 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 13:52:01,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:01,376 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 13:52:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130232328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:01,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315616118] [2021-12-22 13:52:01,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:01,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-22 13:52:01,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 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 13:52:01,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:01,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-22 13:52:01,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:01,444 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2021-12-22 13:52:01,445 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-22 13:52:01,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 820 event pairs, 28 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2021-12-22 13:52:01,446 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2021-12-22 13:52:01,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2021-12-22 13:52:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2021-12-22 13:52:01,448 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2021-12-22 13:52:01,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2021-12-22 13:52:01,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2021-12-22 13:52:01,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:01,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2021-12-22 13:52:01,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 0 states have call successors, (0), 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 13:52:01,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 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 13:52:01,451 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 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 13:52:01,451 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2021-12-22 13:52:01,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2021-12-22 13:52:01,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:01,452 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2021-12-22 13:52:01,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2021-12-22 13:52:01,453 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2021-12-22 13:52:01,453 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2021-12-22 13:52:01,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 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 13:52:01,453 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:01,454 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:01,472 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 13:52:01,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:01,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2021-12-22 13:52:01,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:01,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578751255] [2021-12-22 13:52:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:01,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578751255] [2021-12-22 13:52:01,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578751255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105408165] [2021-12-22 13:52:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:01,732 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 13:52:01,733 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 13:52:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:52:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:01,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:02,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105408165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:02,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:02,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-22 13:52:02,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53187055] [2021-12-22 13:52:02,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:02,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:52:02,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:02,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:52:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:52:02,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-22 13:52:02,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 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 13:52:02,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:02,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-22 13:52:02,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:02,373 INFO L129 PetriNetUnfolder]: 768/1925 cut-off events. [2021-12-22 13:52:02,373 INFO L130 PetriNetUnfolder]: For 1179/1187 co-relation queries the response was YES. [2021-12-22 13:52:02,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1925 events. 768/1925 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12692 event pairs, 54 based on Foata normal form. 13/1938 useless extension candidates. Maximal degree in co-relation 1672. Up to 663 conditions per place. [2021-12-22 13:52:02,385 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2021-12-22 13:52:02,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2021-12-22 13:52:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:52:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:52:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2021-12-22 13:52:02,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2021-12-22 13:52:02,388 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2021-12-22 13:52:02,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2021-12-22 13:52:02,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:02,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2021-12-22 13:52:02,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 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 13:52:02,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 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 13:52:02,393 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 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 13:52:02,393 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2021-12-22 13:52:02,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2021-12-22 13:52:02,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:02,397 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2021-12-22 13:52:02,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2021-12-22 13:52:02,398 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2021-12-22 13:52:02,398 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2021-12-22 13:52:02,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 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 13:52:02,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:02,399 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:02,416 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 13:52:02,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:52:02,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1362214409, now seen corresponding path program 1 times [2021-12-22 13:52:02,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813059108] [2021-12-22 13:52:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:02,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:52:02,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813059108] [2021-12-22 13:52:02,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813059108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207949997] [2021-12-22 13:52:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:02,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:02,684 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 13:52:02,685 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 13:52:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 13:52:02,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:52:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:52:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207949997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:02,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:02,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-22 13:52:02,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499031084] [2021-12-22 13:52:02,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:02,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:52:02,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:52:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:52:02,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-22 13:52:02,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 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 13:52:02,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:02,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-22 13:52:02,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:03,810 INFO L129 PetriNetUnfolder]: 1764/4298 cut-off events. [2021-12-22 13:52:03,810 INFO L130 PetriNetUnfolder]: For 4575/4585 co-relation queries the response was YES. [2021-12-22 13:52:03,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 4298 events. 1764/4298 cut-off events. For 4575/4585 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 34284 event pairs, 65 based on Foata normal form. 28/4326 useless extension candidates. Maximal degree in co-relation 4818. Up to 1292 conditions per place. [2021-12-22 13:52:03,842 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2021-12-22 13:52:03,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2021-12-22 13:52:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:52:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-22 13:52:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2021-12-22 13:52:03,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2021-12-22 13:52:03,847 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2021-12-22 13:52:03,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2021-12-22 13:52:03,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:03,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2021-12-22 13:52:03,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 0 states have call successors, (0), 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 13:52:03,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 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 13:52:03,855 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 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 13:52:03,856 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2021-12-22 13:52:03,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2021-12-22 13:52:03,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-22 13:52:03,873 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2021-12-22 13:52:03,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2021-12-22 13:52:03,873 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2021-12-22 13:52:03,874 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2021-12-22 13:52:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 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 13:52:03,874 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:03,874 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:03,894 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 13:52:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:52:04,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2021-12-22 13:52:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913617171] [2021-12-22 13:52:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913617171] [2021-12-22 13:52:04,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913617171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353875279] [2021-12-22 13:52:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:04,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:04,148 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 13:52:04,149 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 13:52:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:52:04,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353875279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:04,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:04,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 21 [2021-12-22 13:52:04,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525823766] [2021-12-22 13:52:04,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:04,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 13:52:04,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 13:52:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:52:04,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-22 13:52:04,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 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 13:52:04,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:04,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-22 13:52:04,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:05,802 INFO L129 PetriNetUnfolder]: 2710/6167 cut-off events. [2021-12-22 13:52:05,802 INFO L130 PetriNetUnfolder]: For 14796/14898 co-relation queries the response was YES. [2021-12-22 13:52:05,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20066 conditions, 6167 events. 2710/6167 cut-off events. For 14796/14898 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49685 event pairs, 0 based on Foata normal form. 295/6461 useless extension candidates. Maximal degree in co-relation 9451. Up to 1549 conditions per place. [2021-12-22 13:52:05,873 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2021-12-22 13:52:05,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2021-12-22 13:52:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-22 13:52:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-22 13:52:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2021-12-22 13:52:05,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2021-12-22 13:52:05,880 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2021-12-22 13:52:05,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2021-12-22 13:52:05,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:05,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2021-12-22 13:52:05,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 0 states have call successors, (0), 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 13:52:05,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 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 13:52:05,892 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 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 13:52:05,892 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2021-12-22 13:52:05,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2021-12-22 13:52:05,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2021-12-22 13:52:05,962 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2021-12-22 13:52:05,962 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2021-12-22 13:52:05,963 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2021-12-22 13:52:05,963 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2021-12-22 13:52:05,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 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 13:52:05,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:05,964 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 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 13:52:05,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 13:52:06,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:06,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2021-12-22 13:52:06,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657575061] [2021-12-22 13:52:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:06,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:06,203 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:06,204 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:06,215 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:06,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:06,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:52:06,216 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:06,216 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:06,216 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-12-22 13:52:06,226 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,226 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,226 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,226 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,227 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,231 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,232 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,236 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,237 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,238 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,239 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,240 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,241 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,241 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,241 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,241 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,241 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,242 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,242 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,242 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,242 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,242 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,243 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,244 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,244 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,244 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,244 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,245 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,245 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,245 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,245 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:06,248 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-12-22 13:52:06,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:06,252 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 13:52:06,252 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:06,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2021-12-22 13:52:06,289 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2021-12-22 13:52:06,289 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-12-22 13:52:06,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2833 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2021-12-22 13:52:06,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2021-12-22 13:52:06,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2021-12-22 13:52:06,293 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:52:06,293 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:06,294 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:06,294 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] [2021-12-22 13:52:06,294 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2021-12-22 13:52:06,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689362690] [2021-12-22 13:52:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,327 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 13:52:06,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689362690] [2021-12-22 13:52:06,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689362690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:06,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:06,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:52:06,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702198361] [2021-12-22 13:52:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:06,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:52:06,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:52:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:52:06,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2021-12-22 13:52:06,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 13:52:06,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:06,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2021-12-22 13:52:06,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:06,338 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2021-12-22 13:52:06,338 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-12-22 13:52:06,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-22 13:52:06,338 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2021-12-22 13:52:06,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2021-12-22 13:52:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:52:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:52:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-22 13:52:06,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2021-12-22 13:52:06,339 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-22 13:52:06,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-22 13:52:06,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:06,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-22 13:52:06,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 13:52:06,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 13:52:06,341 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 13:52:06,341 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2021-12-22 13:52:06,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2021-12-22 13:52:06,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:06,342 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2021-12-22 13:52:06,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2021-12-22 13:52:06,342 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-12-22 13:52:06,342 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2021-12-22 13:52:06,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 13:52:06,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:06,343 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] [2021-12-22 13:52:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:52:06,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2021-12-22 13:52:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110120267] [2021-12-22 13:52:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,355 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 13:52:06,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:06,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110120267] [2021-12-22 13:52:06,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110120267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:06,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:06,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:06,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486549413] [2021-12-22 13:52:06,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:06,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:06,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:06,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2021-12-22 13:52:06,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 13:52:06,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:06,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2021-12-22 13:52:06,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:06,383 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2021-12-22 13:52:06,384 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:52:06,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-12-22 13:52:06,384 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2021-12-22 13:52:06,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2021-12-22 13:52:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-22 13:52:06,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-22 13:52:06,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:06,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 13:52:06,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 13:52:06,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 13:52:06,388 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2021-12-22 13:52:06,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2021-12-22 13:52:06,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:06,390 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2021-12-22 13:52:06,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2021-12-22 13:52:06,390 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-12-22 13:52:06,390 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2021-12-22 13:52:06,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 13:52:06,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:06,391 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] [2021-12-22 13:52:06,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:52:06,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2021-12-22 13:52:06,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656722829] [2021-12-22 13:52:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:06,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:06,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656722829] [2021-12-22 13:52:06,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656722829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:06,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:06,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:06,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451622998] [2021-12-22 13:52:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:06,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:06,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:06,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2021-12-22 13:52:06,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 13:52:06,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:06,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2021-12-22 13:52:06,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:06,451 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2021-12-22 13:52:06,452 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2021-12-22 13:52:06,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4068 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2021-12-22 13:52:06,456 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2021-12-22 13:52:06,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2021-12-22 13:52:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-22 13:52:06,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-22 13:52:06,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:06,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-22 13:52:06,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 13:52:06,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 13:52:06,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 13:52:06,458 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2021-12-22 13:52:06,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2021-12-22 13:52:06,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:06,460 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2021-12-22 13:52:06,460 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2021-12-22 13:52:06,460 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2021-12-22 13:52:06,461 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2021-12-22 13:52:06,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 13:52:06,461 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:06,461 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] [2021-12-22 13:52:06,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:52:06,461 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2021-12-22 13:52:06,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781145224] [2021-12-22 13:52:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,480 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 13:52:06,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781145224] [2021-12-22 13:52:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781145224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027068180] [2021-12-22 13:52:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:06,482 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 13:52:06,483 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 13:52:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:06,576 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 13:52:06,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:06,627 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 13:52:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027068180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:06,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:06,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526820678] [2021-12-22 13:52:06,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:06,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-22 13:52:06,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 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 13:52:06,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:06,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-22 13:52:06,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:06,692 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2021-12-22 13:52:06,692 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-22 13:52:06,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2426 event pairs, 94 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2021-12-22 13:52:06,696 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2021-12-22 13:52:06,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2021-12-22 13:52:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2021-12-22 13:52:06,697 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2021-12-22 13:52:06,697 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2021-12-22 13:52:06,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2021-12-22 13:52:06,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:06,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2021-12-22 13:52:06,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 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 13:52:06,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 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 13:52:06,700 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 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 13:52:06,700 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2021-12-22 13:52:06,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2021-12-22 13:52:06,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:06,702 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2021-12-22 13:52:06,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2021-12-22 13:52:06,702 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-22 13:52:06,702 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2021-12-22 13:52:06,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 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 13:52:06,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:06,703 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:06,722 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 13:52:06,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:06,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2021-12-22 13:52:06,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866003507] [2021-12-22 13:52:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:06,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866003507] [2021-12-22 13:52:06,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866003507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:06,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627485041] [2021-12-22 13:52:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:06,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:06,971 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 13:52:06,972 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 13:52:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:52:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627485041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:07,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:07,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2021-12-22 13:52:07,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402238675] [2021-12-22 13:52:07,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:07,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 13:52:07,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 13:52:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:52:07,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-22 13:52:07,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 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 13:52:07,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:07,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-22 13:52:07,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:08,698 INFO L129 PetriNetUnfolder]: 2264/4409 cut-off events. [2021-12-22 13:52:08,698 INFO L130 PetriNetUnfolder]: For 2523/2523 co-relation queries the response was YES. [2021-12-22 13:52:08,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11286 conditions, 4409 events. 2264/4409 cut-off events. For 2523/2523 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 29439 event pairs, 78 based on Foata normal form. 74/4483 useless extension candidates. Maximal degree in co-relation 11273. Up to 1984 conditions per place. [2021-12-22 13:52:08,727 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 171 selfloop transitions, 243 changer transitions 0/454 dead transitions. [2021-12-22 13:52:08,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 454 transitions, 2650 flow [2021-12-22 13:52:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-22 13:52:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-12-22 13:52:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4667 transitions. [2021-12-22 13:52:08,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790339007711335 [2021-12-22 13:52:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4667 transitions. [2021-12-22 13:52:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4667 transitions. [2021-12-22 13:52:08,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:08,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4667 transitions. [2021-12-22 13:52:08,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.075949367088604) internal successors, (4667), 79 states have internal predecessors, (4667), 0 states have call successors, (0), 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 13:52:08,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 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 13:52:08,748 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 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 13:52:08,748 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 79 states and 4667 transitions. [2021-12-22 13:52:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 454 transitions, 2650 flow [2021-12-22 13:52:08,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 454 transitions, 2598 flow, removed 24 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:08,756 INFO L242 Difference]: Finished difference. Result has 193 places, 311 transitions, 1969 flow [2021-12-22 13:52:08,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=1969, PETRI_PLACES=193, PETRI_TRANSITIONS=311} [2021-12-22 13:52:08,757 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 119 predicate places. [2021-12-22 13:52:08,757 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 311 transitions, 1969 flow [2021-12-22 13:52:08,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 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 13:52:08,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:08,758 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 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 13:52:08,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:52:08,971 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,SelfDestructingSolverStorable24 [2021-12-22 13:52:08,972 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2021-12-22 13:52:08,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:08,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623520733] [2021-12-22 13:52:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:08,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:09,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:09,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623520733] [2021-12-22 13:52:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623520733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:09,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855276135] [2021-12-22 13:52:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:09,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:09,057 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 13:52:09,058 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 13:52:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:09,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:52:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:09,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:52:09,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855276135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:09,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:52:09,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-12-22 13:52:09,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722310660] [2021-12-22 13:52:09,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:09,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:52:09,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:09,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:52:09,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:52:09,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-22 13:52:09,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 311 transitions, 1969 flow. Second operand has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 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 13:52:09,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:09,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-22 13:52:09,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:09,657 INFO L129 PetriNetUnfolder]: 926/2474 cut-off events. [2021-12-22 13:52:09,657 INFO L130 PetriNetUnfolder]: For 30531/31152 co-relation queries the response was YES. [2021-12-22 13:52:09,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11431 conditions, 2474 events. 926/2474 cut-off events. For 30531/31152 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18260 event pairs, 213 based on Foata normal form. 353/2730 useless extension candidates. Maximal degree in co-relation 11391. Up to 1007 conditions per place. [2021-12-22 13:52:09,683 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 17 selfloop transitions, 82 changer transitions 0/311 dead transitions. [2021-12-22 13:52:09,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 311 transitions, 2137 flow [2021-12-22 13:52:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:52:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:52:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1204 transitions. [2021-12-22 13:52:09,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2021-12-22 13:52:09,685 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1204 transitions. [2021-12-22 13:52:09,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1204 transitions. [2021-12-22 13:52:09,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:09,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1204 transitions. [2021-12-22 13:52:09,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 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 13:52:09,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 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 13:52:09,689 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 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 13:52:09,689 INFO L186 Difference]: Start difference. First operand has 193 places, 311 transitions, 1969 flow. Second operand 18 states and 1204 transitions. [2021-12-22 13:52:09,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 311 transitions, 2137 flow [2021-12-22 13:52:09,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 311 transitions, 1953 flow, removed 27 selfloop flow, removed 12 redundant places. [2021-12-22 13:52:09,730 INFO L242 Difference]: Finished difference. Result has 197 places, 304 transitions, 1885 flow [2021-12-22 13:52:09,730 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=197, PETRI_TRANSITIONS=304} [2021-12-22 13:52:09,731 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2021-12-22 13:52:09,731 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 304 transitions, 1885 flow [2021-12-22 13:52:09,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 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 13:52:09,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:09,731 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 13:52:09,748 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 13:52:09,948 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,SelfDestructingSolverStorable25 [2021-12-22 13:52:09,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1466686242, now seen corresponding path program 1 times [2021-12-22 13:52:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459948907] [2021-12-22 13:52:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:09,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:52:10,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459948907] [2021-12-22 13:52:10,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459948907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88740320] [2021-12-22 13:52:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:10,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:10,004 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 13:52:10,007 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 13:52:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 13:52:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:52:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:52:10,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88740320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:10,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:10,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-22 13:52:10,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529491714] [2021-12-22 13:52:10,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:10,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:52:10,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:52:10,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:52:10,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-22 13:52:10,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 304 transitions, 1885 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 13:52:10,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:10,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-22 13:52:10,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:11,759 INFO L129 PetriNetUnfolder]: 4044/7969 cut-off events. [2021-12-22 13:52:11,760 INFO L130 PetriNetUnfolder]: For 72958/72980 co-relation queries the response was YES. [2021-12-22 13:52:11,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37934 conditions, 7969 events. 4044/7969 cut-off events. For 72958/72980 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 59380 event pairs, 66 based on Foata normal form. 44/8013 useless extension candidates. Maximal degree in co-relation 37896. Up to 3105 conditions per place. [2021-12-22 13:52:11,849 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 333 selfloop transitions, 374 changer transitions 0/794 dead transitions. [2021-12-22 13:52:11,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 794 transitions, 7248 flow [2021-12-22 13:52:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:52:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-22 13:52:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2406 transitions. [2021-12-22 13:52:11,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6745164003364171 [2021-12-22 13:52:11,853 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2406 transitions. [2021-12-22 13:52:11,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2406 transitions. [2021-12-22 13:52:11,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:11,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2406 transitions. [2021-12-22 13:52:11,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.68292682926829) internal successors, (2406), 41 states have internal predecessors, (2406), 0 states have call successors, (0), 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 13:52:11,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 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 13:52:11,861 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 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 13:52:11,861 INFO L186 Difference]: Start difference. First operand has 197 places, 304 transitions, 1885 flow. Second operand 41 states and 2406 transitions. [2021-12-22 13:52:11,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 794 transitions, 7248 flow [2021-12-22 13:52:11,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 794 transitions, 6504 flow, removed 0 selfloop flow, removed 15 redundant places. [2021-12-22 13:52:12,006 INFO L242 Difference]: Finished difference. Result has 224 places, 566 transitions, 4395 flow [2021-12-22 13:52:12,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4395, PETRI_PLACES=224, PETRI_TRANSITIONS=566} [2021-12-22 13:52:12,007 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 150 predicate places. [2021-12-22 13:52:12,007 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 566 transitions, 4395 flow [2021-12-22 13:52:12,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 13:52:12,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:12,013 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 13:52:12,047 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 13:52:12,230 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,SelfDestructingSolverStorable26 [2021-12-22 13:52:12,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1484109075, now seen corresponding path program 1 times [2021-12-22 13:52:12,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:12,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649977365] [2021-12-22 13:52:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:12,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:52:12,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649977365] [2021-12-22 13:52:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649977365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012918586] [2021-12-22 13:52:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:12,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:12,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:12,313 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 13:52:12,314 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 13:52:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:52:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:52:12,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:52:12,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012918586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:12,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:12,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-12-22 13:52:12,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667349316] [2021-12-22 13:52:12,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 13:52:12,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 13:52:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-22 13:52:12,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-22 13:52:12,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 566 transitions, 4395 flow. Second operand has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 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 13:52:12,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:12,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-22 13:52:12,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:15,710 INFO L129 PetriNetUnfolder]: 7761/15568 cut-off events. [2021-12-22 13:52:15,710 INFO L130 PetriNetUnfolder]: For 168204/168299 co-relation queries the response was YES. [2021-12-22 13:52:15,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76750 conditions, 15568 events. 7761/15568 cut-off events. For 168204/168299 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 132651 event pairs, 90 based on Foata normal form. 93/15656 useless extension candidates. Maximal degree in co-relation 76710. Up to 5383 conditions per place. [2021-12-22 13:52:15,986 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 392 selfloop transitions, 859 changer transitions 0/1356 dead transitions. [2021-12-22 13:52:15,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1356 transitions, 14830 flow [2021-12-22 13:52:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-22 13:52:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-22 13:52:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3846 transitions. [2021-12-22 13:52:15,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.680106100795756 [2021-12-22 13:52:15,991 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3846 transitions. [2021-12-22 13:52:15,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3846 transitions. [2021-12-22 13:52:15,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:15,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3846 transitions. [2021-12-22 13:52:15,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.16923076923077) internal successors, (3846), 65 states have internal predecessors, (3846), 0 states have call successors, (0), 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 13:52:16,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 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 13:52:16,002 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 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 13:52:16,002 INFO L186 Difference]: Start difference. First operand has 224 places, 566 transitions, 4395 flow. Second operand 65 states and 3846 transitions. [2021-12-22 13:52:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1356 transitions, 14830 flow [2021-12-22 13:52:16,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1356 transitions, 14017 flow, removed 233 selfloop flow, removed 10 redundant places. [2021-12-22 13:52:16,573 INFO L242 Difference]: Finished difference. Result has 286 places, 1129 transitions, 11002 flow [2021-12-22 13:52:16,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11002, PETRI_PLACES=286, PETRI_TRANSITIONS=1129} [2021-12-22 13:52:16,575 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2021-12-22 13:52:16,575 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 1129 transitions, 11002 flow [2021-12-22 13:52:16,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 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 13:52:16,575 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:16,575 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 13:52:16,594 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 13:52:16,792 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,SelfDestructingSolverStorable27 [2021-12-22 13:52:16,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash 813208193, now seen corresponding path program 1 times [2021-12-22 13:52:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477179221] [2021-12-22 13:52:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:16,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:52:16,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:16,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477179221] [2021-12-22 13:52:16,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477179221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:16,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927805712] [2021-12-22 13:52:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:16,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:16,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:16,870 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 13:52:16,871 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 13:52:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:16,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:52:16,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:52:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:52:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927805712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:17,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:17,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-12-22 13:52:17,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247911846] [2021-12-22 13:52:17,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:17,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 13:52:17,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 13:52:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-22 13:52:17,219 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-22 13:52:17,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1129 transitions, 11002 flow. Second operand has 23 states, 23 states have (on average 57.04347826086956) internal successors, (1312), 23 states have internal predecessors, (1312), 0 states have call successors, (0), 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 13:52:17,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:17,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-22 13:52:17,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:22,444 INFO L129 PetriNetUnfolder]: 13758/27553 cut-off events. [2021-12-22 13:52:22,444 INFO L130 PetriNetUnfolder]: For 321118/321418 co-relation queries the response was YES. [2021-12-22 13:52:22,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137915 conditions, 27553 events. 13758/27553 cut-off events. For 321118/321418 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 255943 event pairs, 130 based on Foata normal form. 246/27779 useless extension candidates. Maximal degree in co-relation 137872. Up to 8280 conditions per place. [2021-12-22 13:52:22,941 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 453 selfloop transitions, 1615 changer transitions 0/2203 dead transitions. [2021-12-22 13:52:22,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2203 transitions, 27206 flow [2021-12-22 13:52:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-22 13:52:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-22 13:52:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3140 transitions. [2021-12-22 13:52:22,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6809802645846887 [2021-12-22 13:52:22,944 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3140 transitions. [2021-12-22 13:52:22,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3140 transitions. [2021-12-22 13:52:22,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:22,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3140 transitions. [2021-12-22 13:52:22,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 59.24528301886792) internal successors, (3140), 53 states have internal predecessors, (3140), 0 states have call successors, (0), 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 13:52:22,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 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 13:52:22,953 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 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 13:52:22,953 INFO L186 Difference]: Start difference. First operand has 286 places, 1129 transitions, 11002 flow. Second operand 53 states and 3140 transitions. [2021-12-22 13:52:22,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2203 transitions, 27206 flow [2021-12-22 13:52:25,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2203 transitions, 26708 flow, removed 182 selfloop flow, removed 15 redundant places. [2021-12-22 13:52:25,682 INFO L242 Difference]: Finished difference. Result has 328 places, 2016 transitions, 24087 flow [2021-12-22 13:52:25,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=10668, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=24087, PETRI_PLACES=328, PETRI_TRANSITIONS=2016} [2021-12-22 13:52:25,683 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 254 predicate places. [2021-12-22 13:52:25,684 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 2016 transitions, 24087 flow [2021-12-22 13:52:25,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.04347826086956) internal successors, (1312), 23 states have internal predecessors, (1312), 0 states have call successors, (0), 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 13:52:25,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:25,684 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 13:52:25,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 13:52:25,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 933906732, now seen corresponding path program 1 times [2021-12-22 13:52:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530563548] [2021-12-22 13:52:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:25,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 13:52:25,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530563548] [2021-12-22 13:52:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530563548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:25,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:25,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:52:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34711581] [2021-12-22 13:52:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:25,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:52:25,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:52:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:52:25,949 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 87 [2021-12-22 13:52:25,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 2016 transitions, 24087 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 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 13:52:25,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:25,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 87 [2021-12-22 13:52:25,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:34,428 INFO L129 PetriNetUnfolder]: 20206/41363 cut-off events. [2021-12-22 13:52:34,429 INFO L130 PetriNetUnfolder]: For 450710/451229 co-relation queries the response was YES. [2021-12-22 13:52:34,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195284 conditions, 41363 events. 20206/41363 cut-off events. For 450710/451229 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 426891 event pairs, 200 based on Foata normal form. 469/41758 useless extension candidates. Maximal degree in co-relation 195237. Up to 10349 conditions per place. [2021-12-22 13:52:35,000 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 0 selfloop transitions, 0 changer transitions 3079/3079 dead transitions. [2021-12-22 13:52:35,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 3079 transitions, 44657 flow [2021-12-22 13:52:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:52:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:52:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1052 transitions. [2021-12-22 13:52:35,002 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.711291413116971 [2021-12-22 13:52:35,002 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1052 transitions. [2021-12-22 13:52:35,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1052 transitions. [2021-12-22 13:52:35,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:35,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1052 transitions. [2021-12-22 13:52:35,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 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 13:52:35,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 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 13:52:35,005 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 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 13:52:35,005 INFO L186 Difference]: Start difference. First operand has 328 places, 2016 transitions, 24087 flow. Second operand 17 states and 1052 transitions. [2021-12-22 13:52:35,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 3079 transitions, 44657 flow [2021-12-22 13:52:41,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3079 transitions, 43734 flow, removed 270 selfloop flow, removed 21 redundant places. [2021-12-22 13:52:41,992 INFO L242 Difference]: Finished difference. Result has 321 places, 0 transitions, 0 flow [2021-12-22 13:52:41,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=321, PETRI_TRANSITIONS=0} [2021-12-22 13:52:41,993 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2021-12-22 13:52:41,993 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 0 transitions, 0 flow [2021-12-22 13:52:41,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 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 13:52:41,993 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-22 13:52:41,994 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2021-12-22 13:52:41,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:52:41,994 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:41,995 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-12-22 13:52:41,995 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:52:41,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:52:41 BasicIcfg [2021-12-22 13:52:42,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:52:42,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:52:42,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:52:42,000 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:52:42,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:51:58" (3/4) ... [2021-12-22 13:52:42,002 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:52:42,007 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2021-12-22 13:52:42,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-22 13:52:42,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-12-22 13:52:42,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:52:42,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:52:42,025 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:52:42,025 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:52:42,025 INFO L158 Benchmark]: Toolchain (without parser) took 43911.62ms. Allocated memory was 107.0MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 71.8MB in the beginning and 6.0GB in the end (delta: -6.0GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2021-12-22 13:52:42,025 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 75.5MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:52:42,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 373.97ms. Allocated memory is still 107.0MB. Free memory was 71.6MB in the beginning and 73.6MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:52:42,026 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.09ms. Allocated memory is still 107.0MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:52:42,026 INFO L158 Benchmark]: Boogie Preprocessor took 22.47ms. Allocated memory is still 107.0MB. Free memory was 71.5MB in the beginning and 69.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:52:42,026 INFO L158 Benchmark]: RCFGBuilder took 218.50ms. Allocated memory is still 107.0MB. Free memory was 69.9MB in the beginning and 58.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:52:42,026 INFO L158 Benchmark]: TraceAbstraction took 43238.80ms. Allocated memory was 107.0MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 58.9MB in the beginning and 6.0GB in the end (delta: -6.0GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2021-12-22 13:52:42,027 INFO L158 Benchmark]: Witness Printer took 24.74ms. Allocated memory is still 7.9GB. Free memory was 6.0GB in the beginning and 6.0GB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:52:42,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 75.5MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 373.97ms. Allocated memory is still 107.0MB. Free memory was 71.6MB in the beginning and 73.6MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.09ms. Allocated memory is still 107.0MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.47ms. Allocated memory is still 107.0MB. Free memory was 71.5MB in the beginning and 69.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 218.50ms. Allocated memory is still 107.0MB. Free memory was 69.9MB in the beginning and 58.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 43238.80ms. Allocated memory was 107.0MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 58.9MB in the beginning and 6.0GB in the end (delta: -6.0GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. * Witness Printer took 24.74ms. Allocated memory is still 7.9GB. Free memory was 6.0GB in the beginning and 6.0GB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 727]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 62 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 106 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 68 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 12 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 257 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 74 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59 IncrementalHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 14 mSDtfsCounter, 59 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 80 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.2s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1059 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1059 mSDsluCounter, 588 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 493 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 773 IncrementalHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 98 mSDtfsCounter, 773 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6892occurred in iteration=6, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 1456 SizeOfPredicates, 26 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 76/301 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 86 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 35.7s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 32.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2207 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2207 mSDsluCounter, 1285 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1094 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1659 IncrementalHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 195 mSDtfsCounter, 1659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1027 GetRequests, 684 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7457 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24087occurred in iteration=9, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1244 ConstructedInterpolants, 0 QuantifiedInterpolants, 3298 SizeOfPredicates, 48 NumberOfNonLiveVariables, 941 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 455/1403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:52:42,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE