./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:23:48,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:23:48,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:23:48,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:23:48,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:23:48,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:23:48,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:23:48,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:23:48,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:23:48,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:23:48,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:23:48,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:23:48,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:23:48,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:23:48,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:23:48,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:23:48,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:23:48,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:23:48,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:23:48,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:23:48,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:23:48,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:23:48,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:23:48,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:23:48,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:23:48,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:23:48,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:23:48,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:23:48,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:23:48,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:23:48,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:23:48,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:23:48,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:23:48,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:23:48,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:23:48,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:23:48,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:23:48,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:23:48,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:23:48,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:23:48,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:23:48,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:23:48,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:23:48,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:23:48,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:23:48,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:23:48,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:23:48,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:23:48,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:23:48,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:23:48,383 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:23:48,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:23:48,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:23:48,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:23:48,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:23:48,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:23:48,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:23:48,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:23:48,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:23:48,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:48,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:23:48,386 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:23:48,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:23:48,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:23:48,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2021-12-21 15:23:48,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:23:48,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:23:48,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:23:48,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:23:48,597 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:23:48,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2021-12-21 15:23:48,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a19a86c/11e3ce9534bd4db885acbeb8e39ce13b/FLAGb5119fe29 [2021-12-21 15:23:48,964 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:23:48,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2021-12-21 15:23:48,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a19a86c/11e3ce9534bd4db885acbeb8e39ce13b/FLAGb5119fe29 [2021-12-21 15:23:48,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a19a86c/11e3ce9534bd4db885acbeb8e39ce13b [2021-12-21 15:23:48,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:23:48,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:23:48,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:48,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:23:48,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:23:48,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:48" (1/1) ... [2021-12-21 15:23:48,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2a2d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:48, skipping insertion in model container [2021-12-21 15:23:48,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:48" (1/1) ... [2021-12-21 15:23:49,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:23:49,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:23:49,161 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2021-12-21 15:23:49,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:49,182 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:23:49,197 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2021-12-21 15:23:49,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:49,208 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:23:49,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49 WrapperNode [2021-12-21 15:23:49,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:49,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:49,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:23:49,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:23:49,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,233 INFO L137 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-12-21 15:23:49,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:49,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:23:49,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:23:49,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:23:49,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:23:49,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:23:49,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:23:49,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:23:49,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (1/1) ... [2021-12-21 15:23:49,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:49,278 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) [2021-12-21 15:23:49,286 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 [2021-12-21 15:23:49,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:23:49,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:23:49,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:23:49,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:23:49,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:23:49,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:23:49,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:23:49,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:23:49,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:23:49,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:23:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:23:49,308 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:23:49,403 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:23:49,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:23:49,570 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:23:49,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:23:49,598 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 15:23:49,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:49 BoogieIcfgContainer [2021-12-21 15:23:49,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:23:49,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:23:49,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:23:49,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:23:49,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:23:48" (1/3) ... [2021-12-21 15:23:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3140a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:49, skipping insertion in model container [2021-12-21 15:23:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:49" (2/3) ... [2021-12-21 15:23:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3140a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:49, skipping insertion in model container [2021-12-21 15:23:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:49" (3/3) ... [2021-12-21 15:23:49,614 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2021-12-21 15:23:49,618 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:23:49,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:23:49,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:23:49,619 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:23:49,656 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,657 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,660 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,660 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,663 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,664 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,666 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,667 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,667 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,667 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,668 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,669 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,670 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,670 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,671 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,671 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,675 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,675 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,677 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,677 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,680 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,681 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,686 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,687 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,687 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,687 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,687 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,688 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,689 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:49,695 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:23:49,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:23:49,746 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 [2021-12-21 15:23:49,747 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:23:49,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2021-12-21 15:23:49,812 INFO L129 PetriNetUnfolder]: 8/112 cut-off events. [2021-12-21 15:23:49,813 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:23:49,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2021-12-21 15:23:49,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2021-12-21 15:23:49,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2021-12-21 15:23:49,860 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2021-12-21 15:23:49,860 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:23:49,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:49,861 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] [2021-12-21 15:23:49,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2021-12-21 15:23:49,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:49,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87385243] [2021-12-21 15:23:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:49,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:50,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:50,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87385243] [2021-12-21 15:23:50,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87385243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:50,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:50,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:23:50,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574986540] [2021-12-21 15:23:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:23:50,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:50,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:23:50,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:23:50,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2021-12-21 15:23:50,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:50,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:50,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2021-12-21 15:23:50,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:51,007 INFO L129 PetriNetUnfolder]: 301/767 cut-off events. [2021-12-21 15:23:51,007 INFO L130 PetriNetUnfolder]: For 98/109 co-relation queries the response was YES. [2021-12-21 15:23:51,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 767 events. 301/767 cut-off events. For 98/109 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4077 event pairs, 77 based on Foata normal form. 89/756 useless extension candidates. Maximal degree in co-relation 1120. Up to 310 conditions per place. [2021-12-21 15:23:51,018 INFO L132 encePairwiseOnDemand]: 100/115 looper letters, 54 selfloop transitions, 11 changer transitions 2/123 dead transitions. [2021-12-21 15:23:51,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 123 transitions, 416 flow [2021-12-21 15:23:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:23:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:23:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 634 transitions. [2021-12-21 15:23:51,032 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6891304347826087 [2021-12-21 15:23:51,033 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 634 transitions. [2021-12-21 15:23:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 634 transitions. [2021-12-21 15:23:51,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:51,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 634 transitions. [2021-12-21 15:23:51,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.25) internal successors, (634), 8 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:51,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:51,050 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:51,051 INFO L186 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 8 states and 634 transitions. [2021-12-21 15:23:51,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 123 transitions, 416 flow [2021-12-21 15:23:51,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 123 transitions, 392 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:23:51,059 INFO L242 Difference]: Finished difference. Result has 107 places, 101 transitions, 260 flow [2021-12-21 15:23:51,060 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2021-12-21 15:23:51,064 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2021-12-21 15:23:51,065 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 260 flow [2021-12-21 15:23:51,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.28571428571429) internal successors, (513), 7 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:51,065 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:51,065 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] [2021-12-21 15:23:51,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:23:51,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1082138286, now seen corresponding path program 1 times [2021-12-21 15:23:51,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735644856] [2021-12-21 15:23:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:51,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:51,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:51,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735644856] [2021-12-21 15:23:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735644856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:51,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68036314] [2021-12-21 15:23:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:51,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:51,339 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) [2021-12-21 15:23:51,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:23:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 15:23:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:51,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:52,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68036314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:52,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:52,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2021-12-21 15:23:52,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057335297] [2021-12-21 15:23:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:52,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 15:23:52,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 15:23:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-21 15:23:52,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 115 [2021-12-21 15:23:52,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 260 flow. Second operand has 19 states, 19 states have (on average 73.05263157894737) internal successors, (1388), 19 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:52,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:52,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 115 [2021-12-21 15:23:52,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:52,660 INFO L129 PetriNetUnfolder]: 467/1001 cut-off events. [2021-12-21 15:23:52,660 INFO L130 PetriNetUnfolder]: For 497/516 co-relation queries the response was YES. [2021-12-21 15:23:52,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1001 events. 467/1001 cut-off events. For 497/516 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5058 event pairs, 13 based on Foata normal form. 43/980 useless extension candidates. Maximal degree in co-relation 1684. Up to 227 conditions per place. [2021-12-21 15:23:52,669 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 77 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2021-12-21 15:23:52,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 655 flow [2021-12-21 15:23:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:23:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:23:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1079 transitions. [2021-12-21 15:23:52,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6701863354037267 [2021-12-21 15:23:52,673 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1079 transitions. [2021-12-21 15:23:52,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1079 transitions. [2021-12-21 15:23:52,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:52,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1079 transitions. [2021-12-21 15:23:52,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 77.07142857142857) internal successors, (1079), 14 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:52,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 115.0) internal successors, (1725), 15 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:52,679 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 115.0) internal successors, (1725), 15 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:52,679 INFO L186 Difference]: Start difference. First operand has 107 places, 101 transitions, 260 flow. Second operand 14 states and 1079 transitions. [2021-12-21 15:23:52,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 655 flow [2021-12-21 15:23:52,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 643 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:23:52,685 INFO L242 Difference]: Finished difference. Result has 121 places, 113 transitions, 408 flow [2021-12-21 15:23:52,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=408, PETRI_PLACES=121, PETRI_TRANSITIONS=113} [2021-12-21 15:23:52,686 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2021-12-21 15:23:52,686 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 113 transitions, 408 flow [2021-12-21 15:23:52,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.05263157894737) internal successors, (1388), 19 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:52,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:52,687 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] [2021-12-21 15:23:52,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:23:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:52,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -958633325, now seen corresponding path program 1 times [2021-12-21 15:23:52,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:52,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312920593] [2021-12-21 15:23:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:53,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312920593] [2021-12-21 15:23:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312920593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:53,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:23:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778873524] [2021-12-21 15:23:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:53,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:23:53,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:23:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:23:53,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 115 [2021-12-21 15:23:53,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 113 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:53,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:53,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 115 [2021-12-21 15:23:53,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:53,825 INFO L129 PetriNetUnfolder]: 2345/4747 cut-off events. [2021-12-21 15:23:53,826 INFO L130 PetriNetUnfolder]: For 9265/9268 co-relation queries the response was YES. [2021-12-21 15:23:53,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14428 conditions, 4747 events. 2345/4747 cut-off events. For 9265/9268 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34780 event pairs, 160 based on Foata normal form. 1/4287 useless extension candidates. Maximal degree in co-relation 12058. Up to 1093 conditions per place. [2021-12-21 15:23:53,860 INFO L132 encePairwiseOnDemand]: 102/115 looper letters, 177 selfloop transitions, 105 changer transitions 0/350 dead transitions. [2021-12-21 15:23:53,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 350 transitions, 2451 flow [2021-12-21 15:23:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:23:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:23:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1329 transitions. [2021-12-21 15:23:53,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8254658385093168 [2021-12-21 15:23:53,864 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1329 transitions. [2021-12-21 15:23:53,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1329 transitions. [2021-12-21 15:23:53,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:53,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1329 transitions. [2021-12-21 15:23:53,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 94.92857142857143) internal successors, (1329), 14 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:53,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 115.0) internal successors, (1725), 15 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:53,868 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 115.0) internal successors, (1725), 15 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:53,869 INFO L186 Difference]: Start difference. First operand has 121 places, 113 transitions, 408 flow. Second operand 14 states and 1329 transitions. [2021-12-21 15:23:53,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 350 transitions, 2451 flow [2021-12-21 15:23:53,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 350 transitions, 2311 flow, removed 61 selfloop flow, removed 6 redundant places. [2021-12-21 15:23:53,919 INFO L242 Difference]: Finished difference. Result has 139 places, 226 transitions, 1697 flow [2021-12-21 15:23:53,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1697, PETRI_PLACES=139, PETRI_TRANSITIONS=226} [2021-12-21 15:23:53,919 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 36 predicate places. [2021-12-21 15:23:53,920 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 226 transitions, 1697 flow [2021-12-21 15:23:53,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:53,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:53,920 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] [2021-12-21 15:23:53,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:23:53,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1199619273, now seen corresponding path program 2 times [2021-12-21 15:23:53,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:53,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900499235] [2021-12-21 15:23:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:53,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:54,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900499235] [2021-12-21 15:23:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900499235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:54,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:23:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824195369] [2021-12-21 15:23:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:54,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:23:54,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:23:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:23:54,119 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2021-12-21 15:23:54,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 226 transitions, 1697 flow. Second operand has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:54,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2021-12-21 15:23:54,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:54,634 INFO L129 PetriNetUnfolder]: 1521/3597 cut-off events. [2021-12-21 15:23:54,635 INFO L130 PetriNetUnfolder]: For 24796/25093 co-relation queries the response was YES. [2021-12-21 15:23:54,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16497 conditions, 3597 events. 1521/3597 cut-off events. For 24796/25093 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28255 event pairs, 138 based on Foata normal form. 85/3442 useless extension candidates. Maximal degree in co-relation 13499. Up to 1192 conditions per place. [2021-12-21 15:23:54,707 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 229 selfloop transitions, 64 changer transitions 0/363 dead transitions. [2021-12-21 15:23:54,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 363 transitions, 3794 flow [2021-12-21 15:23:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:23:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:23:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2021-12-21 15:23:54,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2021-12-21 15:23:54,710 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 655 transitions. [2021-12-21 15:23:54,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 655 transitions. [2021-12-21 15:23:54,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:54,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 655 transitions. [2021-12-21 15:23:54,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.875) internal successors, (655), 8 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,713 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,713 INFO L186 Difference]: Start difference. First operand has 139 places, 226 transitions, 1697 flow. Second operand 8 states and 655 transitions. [2021-12-21 15:23:54,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 363 transitions, 3794 flow [2021-12-21 15:23:54,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 363 transitions, 3592 flow, removed 101 selfloop flow, removed 0 redundant places. [2021-12-21 15:23:54,790 INFO L242 Difference]: Finished difference. Result has 149 places, 269 transitions, 2403 flow [2021-12-21 15:23:54,790 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=149, PETRI_TRANSITIONS=269} [2021-12-21 15:23:54,791 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 46 predicate places. [2021-12-21 15:23:54,791 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 269 transitions, 2403 flow [2021-12-21 15:23:54,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:54,792 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] [2021-12-21 15:23:54,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:23:54,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash 82552129, now seen corresponding path program 1 times [2021-12-21 15:23:54,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491477704] [2021-12-21 15:23:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:54,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:54,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:54,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491477704] [2021-12-21 15:23:54,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491477704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:54,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:54,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:23:54,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055534461] [2021-12-21 15:23:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:54,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:23:54,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:23:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:23:54,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 115 [2021-12-21 15:23:54,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 269 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:54,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:54,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 115 [2021-12-21 15:23:54,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:56,955 INFO L129 PetriNetUnfolder]: 7039/14185 cut-off events. [2021-12-21 15:23:56,955 INFO L130 PetriNetUnfolder]: For 107585/107721 co-relation queries the response was YES. [2021-12-21 15:23:57,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65272 conditions, 14185 events. 7039/14185 cut-off events. For 107585/107721 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 124460 event pairs, 725 based on Foata normal form. 165/13643 useless extension candidates. Maximal degree in co-relation 55465. Up to 3064 conditions per place. [2021-12-21 15:23:57,114 INFO L132 encePairwiseOnDemand]: 105/115 looper letters, 330 selfloop transitions, 195 changer transitions 0/595 dead transitions. [2021-12-21 15:23:57,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 595 transitions, 7400 flow [2021-12-21 15:23:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:23:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-21 15:23:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1455 transitions. [2021-12-21 15:23:57,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434782608695652 [2021-12-21 15:23:57,118 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1455 transitions. [2021-12-21 15:23:57,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1455 transitions. [2021-12-21 15:23:57,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:57,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1455 transitions. [2021-12-21 15:23:57,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:57,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 115.0) internal successors, (1840), 16 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:57,124 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 115.0) internal successors, (1840), 16 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:57,124 INFO L186 Difference]: Start difference. First operand has 149 places, 269 transitions, 2403 flow. Second operand 15 states and 1455 transitions. [2021-12-21 15:23:57,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 595 transitions, 7400 flow [2021-12-21 15:23:57,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 595 transitions, 7259 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-12-21 15:23:57,430 INFO L242 Difference]: Finished difference. Result has 171 places, 413 transitions, 5270 flow [2021-12-21 15:23:57,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5270, PETRI_PLACES=171, PETRI_TRANSITIONS=413} [2021-12-21 15:23:57,431 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 68 predicate places. [2021-12-21 15:23:57,431 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 413 transitions, 5270 flow [2021-12-21 15:23:57,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:57,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:57,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:57,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:23:57,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash 393902587, now seen corresponding path program 2 times [2021-12-21 15:23:57,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:57,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274362548] [2021-12-21 15:23:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:57,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:57,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274362548] [2021-12-21 15:23:57,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274362548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:57,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:57,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:23:57,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339810904] [2021-12-21 15:23:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:23:57,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:23:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:23:57,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 115 [2021-12-21 15:23:57,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 413 transitions, 5270 flow. Second operand has 5 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:57,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:57,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 115 [2021-12-21 15:23:57,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:59,650 INFO L129 PetriNetUnfolder]: 7953/14769 cut-off events. [2021-12-21 15:23:59,650 INFO L130 PetriNetUnfolder]: For 180952/181184 co-relation queries the response was YES. [2021-12-21 15:23:59,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84549 conditions, 14769 events. 7953/14769 cut-off events. For 180952/181184 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 124086 event pairs, 2073 based on Foata normal form. 27/13880 useless extension candidates. Maximal degree in co-relation 72609. Up to 9122 conditions per place. [2021-12-21 15:23:59,995 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 369 selfloop transitions, 99 changer transitions 9/557 dead transitions. [2021-12-21 15:23:59,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 557 transitions, 8362 flow [2021-12-21 15:23:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:23:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:23:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 575 transitions. [2021-12-21 15:23:59,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-12-21 15:23:59,998 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 575 transitions. [2021-12-21 15:23:59,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 575 transitions. [2021-12-21 15:23:59,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:59,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 575 transitions. [2021-12-21 15:24:00,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.83333333333333) internal successors, (575), 6 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:00,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:00,001 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:00,001 INFO L186 Difference]: Start difference. First operand has 171 places, 413 transitions, 5270 flow. Second operand 6 states and 575 transitions. [2021-12-21 15:24:00,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 557 transitions, 8362 flow [2021-12-21 15:24:00,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 557 transitions, 8026 flow, removed 168 selfloop flow, removed 0 redundant places. [2021-12-21 15:24:00,640 INFO L242 Difference]: Finished difference. Result has 180 places, 443 transitions, 5809 flow [2021-12-21 15:24:00,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5809, PETRI_PLACES=180, PETRI_TRANSITIONS=443} [2021-12-21 15:24:00,641 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 77 predicate places. [2021-12-21 15:24:00,641 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 443 transitions, 5809 flow [2021-12-21 15:24:00,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:00,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:00,642 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] [2021-12-21 15:24:00,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:24:00,642 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:24:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1596044119, now seen corresponding path program 3 times [2021-12-21 15:24:00,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151400932] [2021-12-21 15:24:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:00,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:00,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151400932] [2021-12-21 15:24:00,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151400932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:00,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531273015] [2021-12-21 15:24:00,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:24:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:00,758 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) [2021-12-21 15:24:00,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:24:00,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:24:00,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 15:24:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:01,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:24:01,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531273015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:01,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:24:01,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2021-12-21 15:24:01,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60099728] [2021-12-21 15:24:01,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:24:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:24:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:24:01,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2021-12-21 15:24:01,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 443 transitions, 5809 flow. Second operand has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:01,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:01,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2021-12-21 15:24:01,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:04,152 INFO L129 PetriNetUnfolder]: 10546/18925 cut-off events. [2021-12-21 15:24:04,153 INFO L130 PetriNetUnfolder]: For 257457/257799 co-relation queries the response was YES. [2021-12-21 15:24:04,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115658 conditions, 18925 events. 10546/18925 cut-off events. For 257457/257799 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 159996 event pairs, 2288 based on Foata normal form. 576/19283 useless extension candidates. Maximal degree in co-relation 101677. Up to 10517 conditions per place. [2021-12-21 15:24:04,361 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 607 selfloop transitions, 107 changer transitions 3/785 dead transitions. [2021-12-21 15:24:04,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 785 transitions, 12170 flow [2021-12-21 15:24:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:24:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-21 15:24:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1032 transitions. [2021-12-21 15:24:04,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6903010033444816 [2021-12-21 15:24:04,364 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1032 transitions. [2021-12-21 15:24:04,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1032 transitions. [2021-12-21 15:24:04,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:04,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1032 transitions. [2021-12-21 15:24:04,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.38461538461539) internal successors, (1032), 13 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:04,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 115.0) internal successors, (1610), 14 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:04,369 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 115.0) internal successors, (1610), 14 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:04,369 INFO L186 Difference]: Start difference. First operand has 180 places, 443 transitions, 5809 flow. Second operand 13 states and 1032 transitions. [2021-12-21 15:24:04,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 785 transitions, 12170 flow [2021-12-21 15:24:05,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 785 transitions, 11943 flow, removed 26 selfloop flow, removed 1 redundant places. [2021-12-21 15:24:05,317 INFO L242 Difference]: Finished difference. Result has 198 places, 511 transitions, 6996 flow [2021-12-21 15:24:05,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6996, PETRI_PLACES=198, PETRI_TRANSITIONS=511} [2021-12-21 15:24:05,318 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2021-12-21 15:24:05,318 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 511 transitions, 6996 flow [2021-12-21 15:24:05,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:05,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:05,319 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] [2021-12-21 15:24:05,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:05,527 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 [2021-12-21 15:24:05,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:24:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 209813985, now seen corresponding path program 4 times [2021-12-21 15:24:05,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:05,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932112530] [2021-12-21 15:24:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:05,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:07,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932112530] [2021-12-21 15:24:07,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932112530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494056324] [2021-12-21 15:24:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:24:07,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:07,556 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) [2021-12-21 15:24:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:24:07,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:24:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 15:24:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates...