./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:40:15,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:40:15,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:40:15,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:40:15,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:40:15,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:40:15,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:40:15,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:40:15,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:40:15,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:40:15,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:40:15,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:40:15,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:40:15,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:40:15,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:40:15,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:40:15,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:40:15,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:40:15,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:40:15,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:40:15,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:40:15,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:40:15,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:40:16,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:40:16,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:40:16,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:40:16,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:40:16,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:40:16,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:40:16,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:40:16,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:40:16,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:40:16,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:40:16,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:40:16,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:40:16,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:40:16,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:40:16,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:40:16,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:40:16,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:40:16,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:40:16,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:40:16,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:40:16,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:40:16,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:40:16,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:40:16,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:40:16,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:40:16,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:40:16,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:40:16,031 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:40:16,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:40:16,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:40:16,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:40:16,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:40:16,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:40:16,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:40:16,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:40:16,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:40:16,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:40:16,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:40:16,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:40:16,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:40:16,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:40:16,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2021-12-22 13:40:16,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:40:16,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:40:16,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:40:16,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:40:16,243 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:40:16,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-12-22 13:40:16,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662f7cf70/a20542cd5e8e4dfc96c2688ea5e536b7/FLAGd21ac6fda [2021-12-22 13:40:16,664 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:40:16,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-12-22 13:40:16,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662f7cf70/a20542cd5e8e4dfc96c2688ea5e536b7/FLAGd21ac6fda [2021-12-22 13:40:17,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662f7cf70/a20542cd5e8e4dfc96c2688ea5e536b7 [2021-12-22 13:40:17,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:40:17,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:40:17,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:40:17,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:40:17,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:40:17,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3788d37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17, skipping insertion in model container [2021-12-22 13:40:17,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:40:17,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:40:17,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-12-22 13:40:17,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:40:17,316 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:40:17,333 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-12-22 13:40:17,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:40:17,343 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:40:17,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17 WrapperNode [2021-12-22 13:40:17,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:40:17,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:40:17,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:40:17,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:40:17,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,374 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-22 13:40:17,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:40:17,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:40:17,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:40:17,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:40:17,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:40:17,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:40:17,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:40:17,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:40:17,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (1/1) ... [2021-12-22 13:40:17,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:40:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:17,440 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 13:40:17,458 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 13:40:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:40:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:40:17,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:40:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:40:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:40:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-22 13:40:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-22 13:40:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-22 13:40:17,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-22 13:40:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:40:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:40:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:40:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:40:17,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:40:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:40:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:40:17,486 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 13:40:17,560 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:40:17,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:40:17,820 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:40:17,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:40:17,827 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 13:40:17,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:40:17 BoogieIcfgContainer [2021-12-22 13:40:17,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:40:17,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:40:17,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:40:17,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:40:17,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:40:17" (1/3) ... [2021-12-22 13:40:17,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d5b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:40:17, skipping insertion in model container [2021-12-22 13:40:17,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:17" (2/3) ... [2021-12-22 13:40:17,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d5b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:40:17, skipping insertion in model container [2021-12-22 13:40:17,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:40:17" (3/3) ... [2021-12-22 13:40:17,835 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2021-12-22 13:40:17,839 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:40:17,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:40:17,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:40:17,839 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:40:17,870 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,874 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,874 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,875 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,875 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,876 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,876 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,876 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,877 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,885 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,885 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,886 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,886 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:17,890 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-22 13:40:17,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:40:17,934 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 13:40:17,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-22 13:40:17,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2021-12-22 13:40:18,022 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2021-12-22 13:40:18,022 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:40:18,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2021-12-22 13:40:18,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2021-12-22 13:40:18,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2021-12-22 13:40:18,068 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2021-12-22 13:40:18,068 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:40:18,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:18,069 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:18,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 681650960, now seen corresponding path program 1 times [2021-12-22 13:40:18,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707143955] [2021-12-22 13:40:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:18,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:18,311 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 13:40:18,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707143955] [2021-12-22 13:40:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707143955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:18,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:40:18,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065145446] [2021-12-22 13:40:18,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:40:18,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:40:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:40:18,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2021-12-22 13:40:18,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 13:40:18,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:18,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2021-12-22 13:40:18,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:18,394 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2021-12-22 13:40:18,394 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-22 13:40:18,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2021-12-22 13:40:18,397 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2021-12-22 13:40:18,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2021-12-22 13:40:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:40:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:40:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2021-12-22 13:40:18,411 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2021-12-22 13:40:18,411 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2021-12-22 13:40:18,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2021-12-22 13:40:18,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:18,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2021-12-22 13:40:18,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 13:40:18,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 13:40:18,428 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 13:40:18,432 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2021-12-22 13:40:18,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2021-12-22 13:40:18,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-22 13:40:18,439 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2021-12-22 13:40:18,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2021-12-22 13:40:18,446 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2021-12-22 13:40:18,446 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2021-12-22 13:40:18,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 13:40:18,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:18,451 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:18,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:40:18,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -712841604, now seen corresponding path program 1 times [2021-12-22 13:40:18,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981021470] [2021-12-22 13:40:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:18,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:18,842 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 13:40:18,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:18,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981021470] [2021-12-22 13:40:18,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981021470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:18,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:18,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:18,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828237053] [2021-12-22 13:40:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:18,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:18,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:18,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2021-12-22 13:40:18,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 13:40:18,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:18,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2021-12-22 13:40:18,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:19,640 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2021-12-22 13:40:19,641 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2021-12-22 13:40:19,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52550 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2021-12-22 13:40:19,714 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2021-12-22 13:40:19,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2021-12-22 13:40:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2021-12-22 13:40:19,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2021-12-22 13:40:19,718 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2021-12-22 13:40:19,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2021-12-22 13:40:19,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:19,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2021-12-22 13:40:19,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states 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 13:40:19,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:19,723 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:19,723 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2021-12-22 13:40:19,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2021-12-22 13:40:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:40:19,727 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2021-12-22 13:40:19,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2021-12-22 13:40:19,728 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2021-12-22 13:40:19,728 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2021-12-22 13:40:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 13:40:19,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:19,729 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:40:19,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2021-12-22 13:40:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295166183] [2021-12-22 13:40:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:19,905 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 13:40:19,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295166183] [2021-12-22 13:40:19,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295166183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:40:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107284986] [2021-12-22 13:40:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:19,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:19,909 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 13:40:19,910 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 13:40:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:40:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:40:20,354 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 13:40:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:40:20,564 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 13:40:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107284986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:40:20,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:40:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-22 13:40:20,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874985855] [2021-12-22 13:40:20,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:40:20,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:40:20,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:40:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:40:20,567 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 137 [2021-12-22 13:40:20,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 94.7) internal successors, (947), 10 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 13:40:20,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:20,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 137 [2021-12-22 13:40:20,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:21,284 INFO L129 PetriNetUnfolder]: 3382/6436 cut-off events. [2021-12-22 13:40:21,285 INFO L130 PetriNetUnfolder]: For 673/783 co-relation queries the response was YES. [2021-12-22 13:40:21,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12443 conditions, 6436 events. 3382/6436 cut-off events. For 673/783 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49630 event pairs, 717 based on Foata normal form. 41/5036 useless extension candidates. Maximal degree in co-relation 12436. Up to 2263 conditions per place. [2021-12-22 13:40:21,325 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 103 selfloop transitions, 20 changer transitions 0/199 dead transitions. [2021-12-22 13:40:21,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 737 flow [2021-12-22 13:40:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:40:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:40:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1205 transitions. [2021-12-22 13:40:21,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7329683698296837 [2021-12-22 13:40:21,328 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1205 transitions. [2021-12-22 13:40:21,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1205 transitions. [2021-12-22 13:40:21,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:21,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1205 transitions. [2021-12-22 13:40:21,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.41666666666667) internal successors, (1205), 12 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states 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 13:40:21,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states 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 13:40:21,334 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states 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 13:40:21,334 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 12 states and 1205 transitions. [2021-12-22 13:40:21,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 737 flow [2021-12-22 13:40:21,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 199 transitions, 716 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-22 13:40:21,338 INFO L242 Difference]: Finished difference. Result has 134 places, 128 transitions, 390 flow [2021-12-22 13:40:21,339 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=390, PETRI_PLACES=134, PETRI_TRANSITIONS=128} [2021-12-22 13:40:21,339 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2021-12-22 13:40:21,339 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 128 transitions, 390 flow [2021-12-22 13:40:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 94.7) internal successors, (947), 10 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 13:40:21,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:21,340 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:21,373 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 13:40:21,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:21,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -8459349, now seen corresponding path program 2 times [2021-12-22 13:40:21,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444848030] [2021-12-22 13:40:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:21,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:21,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444848030] [2021-12-22 13:40:21,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444848030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:21,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:21,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:21,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458456899] [2021-12-22 13:40:21,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:21,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:21,707 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-22 13:40:21,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 128 transitions, 390 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:21,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:21,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-22 13:40:21,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:22,807 INFO L129 PetriNetUnfolder]: 9701/14002 cut-off events. [2021-12-22 13:40:22,808 INFO L130 PetriNetUnfolder]: For 14085/14168 co-relation queries the response was YES. [2021-12-22 13:40:22,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37368 conditions, 14002 events. 9701/14002 cut-off events. For 14085/14168 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 84281 event pairs, 3214 based on Foata normal form. 37/12742 useless extension candidates. Maximal degree in co-relation 37357. Up to 12875 conditions per place. [2021-12-22 13:40:22,937 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 11 changer transitions 1/156 dead transitions. [2021-12-22 13:40:22,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 686 flow [2021-12-22 13:40:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-12-22 13:40:22,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-12-22 13:40:22,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-12-22 13:40:22,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-12-22 13:40:22,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:22,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-12-22 13:40:22,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 13:40:22,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:22,942 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:22,943 INFO L186 Difference]: Start difference. First operand has 134 places, 128 transitions, 390 flow. Second operand 6 states and 550 transitions. [2021-12-22 13:40:22,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 686 flow [2021-12-22 13:40:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 156 transitions, 680 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:22,983 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 449 flow [2021-12-22 13:40:22,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2021-12-22 13:40:22,988 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2021-12-22 13:40:22,989 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 449 flow [2021-12-22 13:40:22,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:22,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:22,989 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:22,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:40:22,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash -64222800, now seen corresponding path program 1 times [2021-12-22 13:40:22,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:22,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102623970] [2021-12-22 13:40:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:22,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:23,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102623970] [2021-12-22 13:40:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102623970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:23,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289159633] [2021-12-22 13:40:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:23,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:23,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-22 13:40:23,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:23,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:23,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-22 13:40:23,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:24,463 INFO L129 PetriNetUnfolder]: 9680/15017 cut-off events. [2021-12-22 13:40:24,464 INFO L130 PetriNetUnfolder]: For 18936/19005 co-relation queries the response was YES. [2021-12-22 13:40:24,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39640 conditions, 15017 events. 9680/15017 cut-off events. For 18936/19005 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 103181 event pairs, 4003 based on Foata normal form. 0/13720 useless extension candidates. Maximal degree in co-relation 39626. Up to 12875 conditions per place. [2021-12-22 13:40:24,563 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 88 selfloop transitions, 17 changer transitions 1/168 dead transitions. [2021-12-22 13:40:24,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 168 transitions, 869 flow [2021-12-22 13:40:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2021-12-22 13:40:24,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6715328467153284 [2021-12-22 13:40:24,565 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2021-12-22 13:40:24,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2021-12-22 13:40:24,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:24,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2021-12-22 13:40:24,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 13:40:24,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:24,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:24,568 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 449 flow. Second operand 6 states and 552 transitions. [2021-12-22 13:40:24,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 168 transitions, 869 flow [2021-12-22 13:40:24,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 168 transitions, 823 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-12-22 13:40:24,584 INFO L242 Difference]: Finished difference. Result has 141 places, 140 transitions, 524 flow [2021-12-22 13:40:24,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2021-12-22 13:40:24,584 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2021-12-22 13:40:24,585 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 524 flow [2021-12-22 13:40:24,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:24,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:24,585 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:24,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:40:24,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1319488414, now seen corresponding path program 2 times [2021-12-22 13:40:24,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:24,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194614787] [2021-12-22 13:40:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:24,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:24,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194614787] [2021-12-22 13:40:24,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194614787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:24,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:24,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:24,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179753126] [2021-12-22 13:40:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:24,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:24,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:24,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-22 13:40:24,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:24,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:24,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-22 13:40:24,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:25,999 INFO L129 PetriNetUnfolder]: 9627/14931 cut-off events. [2021-12-22 13:40:26,000 INFO L130 PetriNetUnfolder]: For 20442/20521 co-relation queries the response was YES. [2021-12-22 13:40:26,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41539 conditions, 14931 events. 9627/14931 cut-off events. For 20442/20521 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 99744 event pairs, 5941 based on Foata normal form. 20/14615 useless extension candidates. Maximal degree in co-relation 41523. Up to 12846 conditions per place. [2021-12-22 13:40:26,210 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 89 selfloop transitions, 15 changer transitions 2/168 dead transitions. [2021-12-22 13:40:26,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 168 transitions, 890 flow [2021-12-22 13:40:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-12-22 13:40:26,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-12-22 13:40:26,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-12-22 13:40:26,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-12-22 13:40:26,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:26,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-12-22 13:40:26,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 13:40:26,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:26,242 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 13:40:26,242 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 524 flow. Second operand 6 states and 550 transitions. [2021-12-22 13:40:26,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 168 transitions, 890 flow [2021-12-22 13:40:26,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 168 transitions, 875 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:26,310 INFO L242 Difference]: Finished difference. Result has 145 places, 140 transitions, 562 flow [2021-12-22 13:40:26,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=145, PETRI_TRANSITIONS=140} [2021-12-22 13:40:26,323 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 22 predicate places. [2021-12-22 13:40:26,324 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 140 transitions, 562 flow [2021-12-22 13:40:26,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 13:40:26,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:26,324 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:26,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:40:26,325 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1243219261, now seen corresponding path program 1 times [2021-12-22 13:40:26,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:26,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570740055] [2021-12-22 13:40:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:26,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:26,654 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 13:40:26,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570740055] [2021-12-22 13:40:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570740055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:40:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340495456] [2021-12-22 13:40:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:26,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:26,662 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 13:40:26,691 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 13:40:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:40:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:40:27,114 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 13:40:27,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:40:27,375 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 13:40:27,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340495456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:40:27,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:40:27,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-22 13:40:27,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623453890] [2021-12-22 13:40:27,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:40:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:40:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:40:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:40:27,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-22 13:40:27,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 140 transitions, 562 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states 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 13:40:27,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:27,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-22 13:40:27,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:29,920 INFO L129 PetriNetUnfolder]: 15101/24323 cut-off events. [2021-12-22 13:40:29,920 INFO L130 PetriNetUnfolder]: For 35551/35592 co-relation queries the response was YES. [2021-12-22 13:40:29,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69278 conditions, 24323 events. 15101/24323 cut-off events. For 35551/35592 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 182953 event pairs, 2152 based on Foata normal form. 603/24680 useless extension candidates. Maximal degree in co-relation 69260. Up to 10026 conditions per place. [2021-12-22 13:40:30,222 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 253 selfloop transitions, 30 changer transitions 2/347 dead transitions. [2021-12-22 13:40:30,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 347 transitions, 2192 flow [2021-12-22 13:40:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:40:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:40:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1303 transitions. [2021-12-22 13:40:30,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6793534932221064 [2021-12-22 13:40:30,226 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1303 transitions. [2021-12-22 13:40:30,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1303 transitions. [2021-12-22 13:40:30,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:30,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1303 transitions. [2021-12-22 13:40:30,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.07142857142857) internal successors, (1303), 14 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 13:40:30,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 13:40:30,232 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 13:40:30,232 INFO L186 Difference]: Start difference. First operand has 145 places, 140 transitions, 562 flow. Second operand 14 states and 1303 transitions. [2021-12-22 13:40:30,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 347 transitions, 2192 flow [2021-12-22 13:40:30,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 347 transitions, 2153 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:30,268 INFO L242 Difference]: Finished difference. Result has 162 places, 152 transitions, 712 flow [2021-12-22 13:40:30,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=712, PETRI_PLACES=162, PETRI_TRANSITIONS=152} [2021-12-22 13:40:30,268 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 39 predicate places. [2021-12-22 13:40:30,269 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 152 transitions, 712 flow [2021-12-22 13:40:30,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states 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 13:40:30,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:30,269 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:30,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:40:30,485 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,SelfDestructingSolverStorable6 [2021-12-22 13:40:30,486 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash 462475452, now seen corresponding path program 3 times [2021-12-22 13:40:30,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190451855] [2021-12-22 13:40:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:30,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:30,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190451855] [2021-12-22 13:40:30,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190451855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:30,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:30,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:30,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460277337] [2021-12-22 13:40:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:30,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:30,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-22 13:40:30,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 152 transitions, 712 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 13:40:30,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:30,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-22 13:40:30,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:32,799 INFO L129 PetriNetUnfolder]: 16638/25929 cut-off events. [2021-12-22 13:40:32,799 INFO L130 PetriNetUnfolder]: For 59419/59479 co-relation queries the response was YES. [2021-12-22 13:40:32,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85714 conditions, 25929 events. 16638/25929 cut-off events. For 59419/59479 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 188660 event pairs, 6905 based on Foata normal form. 480/26168 useless extension candidates. Maximal degree in co-relation 85690. Up to 16663 conditions per place. [2021-12-22 13:40:32,980 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 19 changer transitions 2/215 dead transitions. [2021-12-22 13:40:32,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 215 transitions, 1389 flow [2021-12-22 13:40:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2021-12-22 13:40:32,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2021-12-22 13:40:32,982 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2021-12-22 13:40:32,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2021-12-22 13:40:32,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:32,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2021-12-22 13:40:33,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 13:40:33,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:33,093 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:33,093 INFO L186 Difference]: Start difference. First operand has 162 places, 152 transitions, 712 flow. Second operand 7 states and 649 transitions. [2021-12-22 13:40:33,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 215 transitions, 1389 flow [2021-12-22 13:40:33,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 215 transitions, 1358 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-12-22 13:40:33,305 INFO L242 Difference]: Finished difference. Result has 165 places, 153 transitions, 750 flow [2021-12-22 13:40:33,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=750, PETRI_PLACES=165, PETRI_TRANSITIONS=153} [2021-12-22 13:40:33,308 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 42 predicate places. [2021-12-22 13:40:33,308 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 153 transitions, 750 flow [2021-12-22 13:40:33,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 13:40:33,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:33,308 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:33,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:40:33,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 490795772, now seen corresponding path program 1 times [2021-12-22 13:40:33,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107521490] [2021-12-22 13:40:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:33,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:33,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107521490] [2021-12-22 13:40:33,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107521490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:33,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:33,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:33,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21393506] [2021-12-22 13:40:33,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:33,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:33,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:33,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 137 [2021-12-22 13:40:33,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 153 transitions, 750 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 13:40:33,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:33,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 137 [2021-12-22 13:40:33,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:34,926 INFO L129 PetriNetUnfolder]: 8363/15959 cut-off events. [2021-12-22 13:40:34,926 INFO L130 PetriNetUnfolder]: For 50271/51003 co-relation queries the response was YES. [2021-12-22 13:40:34,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55578 conditions, 15959 events. 8363/15959 cut-off events. For 50271/51003 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 140944 event pairs, 3114 based on Foata normal form. 249/15626 useless extension candidates. Maximal degree in co-relation 55552. Up to 6793 conditions per place. [2021-12-22 13:40:35,057 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 121 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2021-12-22 13:40:35,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 223 transitions, 1467 flow [2021-12-22 13:40:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 723 transitions. [2021-12-22 13:40:35,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7539103232533889 [2021-12-22 13:40:35,059 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 723 transitions. [2021-12-22 13:40:35,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 723 transitions. [2021-12-22 13:40:35,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:35,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 723 transitions. [2021-12-22 13:40:35,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 13:40:35,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:35,063 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 13:40:35,063 INFO L186 Difference]: Start difference. First operand has 165 places, 153 transitions, 750 flow. Second operand 7 states and 723 transitions. [2021-12-22 13:40:35,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 223 transitions, 1467 flow [2021-12-22 13:40:35,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 223 transitions, 1444 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:40:35,171 INFO L242 Difference]: Finished difference. Result has 170 places, 156 transitions, 828 flow [2021-12-22 13:40:35,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=170, PETRI_TRANSITIONS=156} [2021-12-22 13:40:35,171 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 47 predicate places. [2021-12-22 13:40:35,172 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 156 transitions, 828 flow [2021-12-22 13:40:35,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 13:40:35,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:35,172 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:35,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:40:35,173 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1971918019, now seen corresponding path program 1 times [2021-12-22 13:40:35,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:35,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860780606] [2021-12-22 13:40:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:35,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:36,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860780606] [2021-12-22 13:40:36,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860780606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:40:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855171191] [2021-12-22 13:40:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:36,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:36,020 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 13:40:36,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process