./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-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-tmp.no-commuhash-c3fed41 [2021-12-17 23:11:52,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:11:52,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:11:52,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:11:52,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:11:52,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:11:52,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:11:52,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:11:52,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:11:52,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:11:52,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:11:52,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:11:52,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:11:52,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:11:52,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:11:52,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:11:52,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:11:52,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:11:52,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:11:52,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:11:52,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:11:52,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:11:52,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:11:52,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:11:52,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:11:52,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:11:52,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:11:52,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:11:52,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:11:52,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:11:52,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:11:52,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:11:52,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:11:52,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:11:52,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:11:52,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:11:52,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:11:52,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:11:52,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:11:52,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:11:52,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:11:52,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:11:52,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:11:52,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:11:52,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:11:52,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:11:52,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:11:52,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:11:52,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:11:52,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:11:52,432 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:11:52,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:11:52,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:11:52,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:11:52,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:11:52,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:11:52,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:11:52,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:11:52,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:11:52,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:11:52,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:11:52,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:11:52,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:11:52,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:11:52,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:11:52,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:11:52,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:11:52,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:11:52,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:11:52,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:11:52,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2021-12-17 23:11:52,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:11:52,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:11:52,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:11:52,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:11:52,636 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:11:52,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2021-12-17 23:11:52,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ebcab539/41ed0cc25aba40a6a5acb2c6228d194e/FLAG7923b542d [2021-12-17 23:11:53,067 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:11:53,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2021-12-17 23:11:53,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ebcab539/41ed0cc25aba40a6a5acb2c6228d194e/FLAG7923b542d [2021-12-17 23:11:53,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ebcab539/41ed0cc25aba40a6a5acb2c6228d194e [2021-12-17 23:11:53,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:11:53,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:11:53,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:11:53,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:11:53,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:11:53,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62863b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53, skipping insertion in model container [2021-12-17 23:11:53,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:11:53,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:11:53,311 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] [2021-12-17 23:11:53,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:11:53,325 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:11:53,361 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] [2021-12-17 23:11:53,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:11:53,373 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:11:53,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53 WrapperNode [2021-12-17 23:11:53,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:11:53,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:11:53,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:11:53,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:11:53,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,411 INFO L137 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-12-17 23:11:53,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:11:53,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:11:53,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:11:53,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:11:53,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:11:53,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:11:53,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:11:53,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:11:53,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (1/1) ... [2021-12-17 23:11:53,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:11:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:11:53,480 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) [2021-12-17 23:11:53,481 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 [2021-12-17 23:11:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:11:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:11:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:11:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:11:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:11:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 23:11:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 23:11:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:11:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:11:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:11:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:11:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:11:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:11:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:11:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:11:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:11:53,507 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:11:53,614 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:11:53,616 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:11:53,823 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:11:53,880 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:11:53,880 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:11:53,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:11:53 BoogieIcfgContainer [2021-12-17 23:11:53,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:11:53,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:11:53,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:11:53,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:11:53,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:11:53" (1/3) ... [2021-12-17 23:11:53,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b103b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:11:53, skipping insertion in model container [2021-12-17 23:11:53,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:11:53" (2/3) ... [2021-12-17 23:11:53,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b103b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:11:53, skipping insertion in model container [2021-12-17 23:11:53,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:11:53" (3/3) ... [2021-12-17 23:11:53,890 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2021-12-17 23:11:53,900 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:11:53,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:11:53,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:11:53,901 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:11:53,926 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,926 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,926 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,927 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,927 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,932 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,932 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,932 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,932 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,936 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,936 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,936 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,937 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,938 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,939 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,939 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,939 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,939 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,939 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,940 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,940 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,942 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,943 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,944 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,944 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,944 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,946 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,947 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,947 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,947 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,947 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,948 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,949 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:11:53,951 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 23:11:53,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:11:53,985 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 [2021-12-17 23:11:53,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 23:11:53,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2021-12-17 23:11:54,052 INFO L129 PetriNetUnfolder]: 8/112 cut-off events. [2021-12-17 23:11:54,053 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:11:54,056 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. [2021-12-17 23:11:54,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2021-12-17 23:11:54,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2021-12-17 23:11:54,073 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2021-12-17 23:11:54,073 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:11:54,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:54,074 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] [2021-12-17 23:11:54,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2021-12-17 23:11:54,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118097090] [2021-12-17 23:11:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:54,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:54,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118097090] [2021-12-17 23:11:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118097090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:54,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:54,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 23:11:54,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061293139] [2021-12-17 23:11:54,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:54,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:11:54,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:11:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:11:54,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2021-12-17 23:11:54,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:54,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:54,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2021-12-17 23:11:54,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:55,258 INFO L129 PetriNetUnfolder]: 349/949 cut-off events. [2021-12-17 23:11:55,259 INFO L130 PetriNetUnfolder]: For 121/132 co-relation queries the response was YES. [2021-12-17 23:11:55,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 949 events. 349/949 cut-off events. For 121/132 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5601 event pairs, 108 based on Foata normal form. 120/942 useless extension candidates. Maximal degree in co-relation 1333. Up to 296 conditions per place. [2021-12-17 23:11:55,273 INFO L132 encePairwiseOnDemand]: 99/115 looper letters, 71 selfloop transitions, 16 changer transitions 3/146 dead transitions. [2021-12-17 23:11:55,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 523 flow [2021-12-17 23:11:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 23:11:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 23:11:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 801 transitions. [2021-12-17 23:11:55,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6965217391304348 [2021-12-17 23:11:55,290 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 801 transitions. [2021-12-17 23:11:55,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 801 transitions. [2021-12-17 23:11:55,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 801 transitions. [2021-12-17 23:11:55,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.1) internal successors, (801), 10 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,308 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,309 INFO L186 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 10 states and 801 transitions. [2021-12-17 23:11:55,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 523 flow [2021-12-17 23:11:55,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 146 transitions, 489 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:11:55,318 INFO L242 Difference]: Finished difference. Result has 110 places, 108 transitions, 291 flow [2021-12-17 23:11:55,319 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2021-12-17 23:11:55,324 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2021-12-17 23:11:55,324 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 291 flow [2021-12-17 23:11:55,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:55,325 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] [2021-12-17 23:11:55,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:11:55,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1082138286, now seen corresponding path program 1 times [2021-12-17 23:11:55,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982760334] [2021-12-17 23:11:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:55,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:11:55,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982760334] [2021-12-17 23:11:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982760334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:55,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:55,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:11:55,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090384708] [2021-12-17 23:11:55,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:55,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:11:55,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:11:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:11:55,623 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 115 [2021-12-17 23:11:55,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:55,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 115 [2021-12-17 23:11:55,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:55,837 INFO L129 PetriNetUnfolder]: 378/1069 cut-off events. [2021-12-17 23:11:55,838 INFO L130 PetriNetUnfolder]: For 376/420 co-relation queries the response was YES. [2021-12-17 23:11:55,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1069 events. 378/1069 cut-off events. For 376/420 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7138 event pairs, 96 based on Foata normal form. 6/961 useless extension candidates. Maximal degree in co-relation 1414. Up to 347 conditions per place. [2021-12-17 23:11:55,845 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 60 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2021-12-17 23:11:55,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 138 transitions, 568 flow [2021-12-17 23:11:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:11:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:11:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 645 transitions. [2021-12-17 23:11:55,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2021-12-17 23:11:55,848 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 645 transitions. [2021-12-17 23:11:55,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 645 transitions. [2021-12-17 23:11:55,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:55,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 645 transitions. [2021-12-17 23:11:55,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.625) internal successors, (645), 8 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,851 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) [2021-12-17 23:11:55,851 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) [2021-12-17 23:11:55,852 INFO L186 Difference]: Start difference. First operand has 110 places, 108 transitions, 291 flow. Second operand 8 states and 645 transitions. [2021-12-17 23:11:55,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 138 transitions, 568 flow [2021-12-17 23:11:55,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 23:11:55,856 INFO L242 Difference]: Finished difference. Result has 115 places, 114 transitions, 380 flow [2021-12-17 23:11:55,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2021-12-17 23:11:55,856 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 12 predicate places. [2021-12-17 23:11:55,857 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 380 flow [2021-12-17 23:11:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:55,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:55,857 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] [2021-12-17 23:11:55,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:11:55,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash 785399094, now seen corresponding path program 1 times [2021-12-17 23:11:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692837033] [2021-12-17 23:11:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:55,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:56,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692837033] [2021-12-17 23:11:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692837033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:11:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294099170] [2021-12-17 23:11:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:56,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:11:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:11:56,060 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) [2021-12-17 23:11:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:11:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 23:11:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:11:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:56,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:11:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294099170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:11:56,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:11:56,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-17 23:11:56,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238957606] [2021-12-17 23:11:56,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:11:56,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 23:11:56,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 23:11:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:11:56,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 115 [2021-12-17 23:11:56,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 380 flow. Second operand has 17 states, 17 states have (on average 79.70588235294117) internal successors, (1355), 17 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:56,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:56,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 115 [2021-12-17 23:11:56,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:57,099 INFO L129 PetriNetUnfolder]: 748/1565 cut-off events. [2021-12-17 23:11:57,099 INFO L130 PetriNetUnfolder]: For 1043/1103 co-relation queries the response was YES. [2021-12-17 23:11:57,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3825 conditions, 1565 events. 748/1565 cut-off events. For 1043/1103 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9676 event pairs, 62 based on Foata normal form. 53/1531 useless extension candidates. Maximal degree in co-relation 2784. Up to 401 conditions per place. [2021-12-17 23:11:57,112 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 96 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2021-12-17 23:11:57,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 176 transitions, 835 flow [2021-12-17 23:11:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 23:11:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 23:11:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 927 transitions. [2021-12-17 23:11:57,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7328063241106719 [2021-12-17 23:11:57,115 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 927 transitions. [2021-12-17 23:11:57,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 927 transitions. [2021-12-17 23:11:57,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:57,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 927 transitions. [2021-12-17 23:11:57,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.27272727272727) internal successors, (927), 11 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,119 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,120 INFO L186 Difference]: Start difference. First operand has 115 places, 114 transitions, 380 flow. Second operand 11 states and 927 transitions. [2021-12-17 23:11:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 176 transitions, 835 flow [2021-12-17 23:11:57,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 176 transitions, 822 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:11:57,129 INFO L242 Difference]: Finished difference. Result has 126 places, 122 transitions, 460 flow [2021-12-17 23:11:57,130 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=460, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2021-12-17 23:11:57,131 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 23 predicate places. [2021-12-17 23:11:57,132 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 460 flow [2021-12-17 23:11:57,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 79.70588235294117) internal successors, (1355), 17 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:57,133 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] [2021-12-17 23:11:57,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:11:57,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:11:57,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 38036621, now seen corresponding path program 1 times [2021-12-17 23:11:57,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583341477] [2021-12-17 23:11:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:57,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:57,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:57,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583341477] [2021-12-17 23:11:57,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583341477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:57,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:57,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:11:57,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280230325] [2021-12-17 23:11:57,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:57,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:11:57,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:11:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:11:57,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2021-12-17 23:11:57,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 460 flow. Second operand has 6 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:57,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2021-12-17 23:11:57,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:57,855 INFO L129 PetriNetUnfolder]: 1639/3434 cut-off events. [2021-12-17 23:11:57,855 INFO L130 PetriNetUnfolder]: For 4420/4426 co-relation queries the response was YES. [2021-12-17 23:11:57,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9450 conditions, 3434 events. 1639/3434 cut-off events. For 4420/4426 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25027 event pairs, 245 based on Foata normal form. 18/3329 useless extension candidates. Maximal degree in co-relation 7764. Up to 1021 conditions per place. [2021-12-17 23:11:57,879 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 111 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2021-12-17 23:11:57,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 206 transitions, 1181 flow [2021-12-17 23:11:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:11:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:11:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 774 transitions. [2021-12-17 23:11:57,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841304347826087 [2021-12-17 23:11:57,883 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 774 transitions. [2021-12-17 23:11:57,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 774 transitions. [2021-12-17 23:11:57,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:57,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 774 transitions. [2021-12-17 23:11:57,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.75) internal successors, (774), 8 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,887 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) [2021-12-17 23:11:57,887 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) [2021-12-17 23:11:57,887 INFO L186 Difference]: Start difference. First operand has 126 places, 122 transitions, 460 flow. Second operand 8 states and 774 transitions. [2021-12-17 23:11:57,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 206 transitions, 1181 flow [2021-12-17 23:11:57,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 206 transitions, 1124 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-12-17 23:11:57,925 INFO L242 Difference]: Finished difference. Result has 133 places, 142 transitions, 679 flow [2021-12-17 23:11:57,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=679, PETRI_PLACES=133, PETRI_TRANSITIONS=142} [2021-12-17 23:11:57,926 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 30 predicate places. [2021-12-17 23:11:57,926 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 142 transitions, 679 flow [2021-12-17 23:11:57,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:57,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:57,927 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] [2021-12-17 23:11:57,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:11:57,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 299676589, now seen corresponding path program 2 times [2021-12-17 23:11:57,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923657452] [2021-12-17 23:11:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:57,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:11:58,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:58,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923657452] [2021-12-17 23:11:58,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923657452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:58,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:58,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:11:58,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129381704] [2021-12-17 23:11:58,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:58,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:11:58,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:11:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:11:58,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2021-12-17 23:11:58,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 142 transitions, 679 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) [2021-12-17 23:11:58,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:58,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2021-12-17 23:11:58,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:58,421 INFO L129 PetriNetUnfolder]: 898/2231 cut-off events. [2021-12-17 23:11:58,422 INFO L130 PetriNetUnfolder]: For 4967/5089 co-relation queries the response was YES. [2021-12-17 23:11:58,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6710 conditions, 2231 events. 898/2231 cut-off events. For 4967/5089 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16143 event pairs, 176 based on Foata normal form. 57/2083 useless extension candidates. Maximal degree in co-relation 5373. Up to 854 conditions per place. [2021-12-17 23:11:58,441 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 86 selfloop transitions, 18 changer transitions 0/178 dead transitions. [2021-12-17 23:11:58,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 178 transitions, 1121 flow [2021-12-17 23:11:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:11:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:11:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2021-12-17 23:11:58,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2021-12-17 23:11:58,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 655 transitions. [2021-12-17 23:11:58,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 655 transitions. [2021-12-17 23:11:58,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:58,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 655 transitions. [2021-12-17 23:11:58,445 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) [2021-12-17 23:11:58,446 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) [2021-12-17 23:11:58,447 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) [2021-12-17 23:11:58,448 INFO L186 Difference]: Start difference. First operand has 133 places, 142 transitions, 679 flow. Second operand 8 states and 655 transitions. [2021-12-17 23:11:58,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 178 transitions, 1121 flow [2021-12-17 23:11:58,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 178 transitions, 1097 flow, removed 11 selfloop flow, removed 1 redundant places. [2021-12-17 23:11:58,483 INFO L242 Difference]: Finished difference. Result has 142 places, 149 transitions, 777 flow [2021-12-17 23:11:58,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=777, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2021-12-17 23:11:58,484 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 39 predicate places. [2021-12-17 23:11:58,484 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 777 flow [2021-12-17 23:11:58,485 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) [2021-12-17 23:11:58,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:58,485 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] [2021-12-17 23:11:58,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:11:58,485 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1382419311, now seen corresponding path program 1 times [2021-12-17 23:11:58,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:58,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954012101] [2021-12-17 23:11:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:58,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:58,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954012101] [2021-12-17 23:11:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954012101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:58,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:58,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:11:58,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799470118] [2021-12-17 23:11:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:58,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:11:58,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:11:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:11:58,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2021-12-17 23:11:58,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:58,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:58,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2021-12-17 23:11:58,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:11:59,542 INFO L129 PetriNetUnfolder]: 4596/8863 cut-off events. [2021-12-17 23:11:59,542 INFO L130 PetriNetUnfolder]: For 28092/28192 co-relation queries the response was YES. [2021-12-17 23:11:59,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31545 conditions, 8863 events. 4596/8863 cut-off events. For 28092/28192 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 72597 event pairs, 447 based on Foata normal form. 90/8413 useless extension candidates. Maximal degree in co-relation 26885. Up to 2034 conditions per place. [2021-12-17 23:11:59,620 INFO L132 encePairwiseOnDemand]: 108/115 looper letters, 171 selfloop transitions, 50 changer transitions 0/294 dead transitions. [2021-12-17 23:11:59,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 294 transitions, 2296 flow [2021-12-17 23:11:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:11:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:11:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 600 transitions. [2021-12-17 23:11:59,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2021-12-17 23:11:59,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 600 transitions. [2021-12-17 23:11:59,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 600 transitions. [2021-12-17 23:11:59,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:11:59,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 600 transitions. [2021-12-17 23:11:59,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:59,625 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) [2021-12-17 23:11:59,626 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) [2021-12-17 23:11:59,626 INFO L186 Difference]: Start difference. First operand has 142 places, 149 transitions, 777 flow. Second operand 6 states and 600 transitions. [2021-12-17 23:11:59,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 294 transitions, 2296 flow [2021-12-17 23:11:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 294 transitions, 2248 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-17 23:11:59,697 INFO L242 Difference]: Finished difference. Result has 147 places, 185 transitions, 1273 flow [2021-12-17 23:11:59,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1273, PETRI_PLACES=147, PETRI_TRANSITIONS=185} [2021-12-17 23:11:59,698 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2021-12-17 23:11:59,699 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 185 transitions, 1273 flow [2021-12-17 23:11:59,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:59,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:11:59,699 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] [2021-12-17 23:11:59,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:11:59,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:11:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:11:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1266518719, now seen corresponding path program 2 times [2021-12-17 23:11:59,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:11:59,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690387145] [2021-12-17 23:11:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:11:59,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:11:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:11:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:11:59,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:11:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690387145] [2021-12-17 23:11:59,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690387145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:11:59,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:11:59,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:11:59,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519929064] [2021-12-17 23:11:59,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:11:59,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:11:59,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:11:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:11:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:11:59,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 115 [2021-12-17 23:11:59,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 185 transitions, 1273 flow. Second operand has 6 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:11:59,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:11:59,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 115 [2021-12-17 23:11:59,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:12:01,424 INFO L129 PetriNetUnfolder]: 7011/15658 cut-off events. [2021-12-17 23:12:01,425 INFO L130 PetriNetUnfolder]: For 63165/63630 co-relation queries the response was YES. [2021-12-17 23:12:01,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58654 conditions, 15658 events. 7011/15658 cut-off events. For 63165/63630 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 158403 event pairs, 458 based on Foata normal form. 40/15393 useless extension candidates. Maximal degree in co-relation 49879. Up to 3288 conditions per place. [2021-12-17 23:12:01,557 INFO L132 encePairwiseOnDemand]: 107/115 looper letters, 247 selfloop transitions, 116 changer transitions 0/441 dead transitions. [2021-12-17 23:12:01,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 441 transitions, 4679 flow [2021-12-17 23:12:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:12:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:12:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 703 transitions. [2021-12-17 23:12:01,559 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8732919254658386 [2021-12-17 23:12:01,559 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 703 transitions. [2021-12-17 23:12:01,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 703 transitions. [2021-12-17 23:12:01,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:12:01,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 703 transitions. [2021-12-17 23:12:01,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:01,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:01,562 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:01,563 INFO L186 Difference]: Start difference. First operand has 147 places, 185 transitions, 1273 flow. Second operand 7 states and 703 transitions. [2021-12-17 23:12:01,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 441 transitions, 4679 flow [2021-12-17 23:12:01,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 441 transitions, 4679 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:12:01,696 INFO L242 Difference]: Finished difference. Result has 158 places, 285 transitions, 2921 flow [2021-12-17 23:12:01,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2921, PETRI_PLACES=158, PETRI_TRANSITIONS=285} [2021-12-17 23:12:01,697 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 55 predicate places. [2021-12-17 23:12:01,697 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 285 transitions, 2921 flow [2021-12-17 23:12:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:01,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:12:01,698 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] [2021-12-17 23:12:01,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 23:12:01,698 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:12:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:12:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1171900755, now seen corresponding path program 3 times [2021-12-17 23:12:01,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:12:01,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396065392] [2021-12-17 23:12:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:12:01,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:12:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:12:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:12:01,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:12:01,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396065392] [2021-12-17 23:12:01,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396065392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:12:01,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:12:01,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:12:01,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705090543] [2021-12-17 23:12:01,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:12:01,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:12:01,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:12:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:12:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:12:01,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2021-12-17 23:12:01,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 285 transitions, 2921 flow. Second operand has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:01,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:12:01,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2021-12-17 23:12:01,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:12:04,652 INFO L129 PetriNetUnfolder]: 11548/24623 cut-off events. [2021-12-17 23:12:04,653 INFO L130 PetriNetUnfolder]: For 142019/142039 co-relation queries the response was YES. [2021-12-17 23:12:04,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104762 conditions, 24623 events. 11548/24623 cut-off events. For 142019/142039 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 258507 event pairs, 1938 based on Foata normal form. 56/24563 useless extension candidates. Maximal degree in co-relation 90415. Up to 6042 conditions per place. [2021-12-17 23:12:04,930 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 240 selfloop transitions, 134 changer transitions 0/447 dead transitions. [2021-12-17 23:12:04,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 447 transitions, 5477 flow [2021-12-17 23:12:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:12:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:12:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2021-12-17 23:12:04,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8583850931677018 [2021-12-17 23:12:04,933 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2021-12-17 23:12:04,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2021-12-17 23:12:04,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:12:04,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2021-12-17 23:12:05,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:05,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:05,085 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:05,085 INFO L186 Difference]: Start difference. First operand has 158 places, 285 transitions, 2921 flow. Second operand 7 states and 691 transitions. [2021-12-17 23:12:05,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 447 transitions, 5477 flow [2021-12-17 23:12:05,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 447 transitions, 5421 flow, removed 28 selfloop flow, removed 0 redundant places. [2021-12-17 23:12:05,426 INFO L242 Difference]: Finished difference. Result has 168 places, 338 transitions, 4131 flow [2021-12-17 23:12:05,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4131, PETRI_PLACES=168, PETRI_TRANSITIONS=338} [2021-12-17 23:12:05,428 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 65 predicate places. [2021-12-17 23:12:05,428 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 338 transitions, 4131 flow [2021-12-17 23:12:05,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:05,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:12:05,429 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] [2021-12-17 23:12:05,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:12:05,430 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:12:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:12:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash 632329845, now seen corresponding path program 4 times [2021-12-17 23:12:05,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:12:05,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561891568] [2021-12-17 23:12:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:12:05,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:12:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:12:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:12:05,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:12:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561891568] [2021-12-17 23:12:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561891568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:12:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434834536] [2021-12-17 23:12:05,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:12:05,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:12:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:12:05,589 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) [2021-12-17 23:12:05,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:12:05,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:12:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:12:05,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 23:12:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:12:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:12:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:12:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:12:06,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434834536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:12:06,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:12:06,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5] total 17 [2021-12-17 23:12:06,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688925989] [2021-12-17 23:12:06,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:12:06,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 23:12:06,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:12:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 23:12:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:12:06,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2021-12-17 23:12:06,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 338 transitions, 4131 flow. Second operand has 17 states, 17 states have (on average 78.70588235294117) internal successors, (1338), 17 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:06,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:12:06,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2021-12-17 23:12:06,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:12:10,206 INFO L129 PetriNetUnfolder]: 13387/24731 cut-off events. [2021-12-17 23:12:10,206 INFO L130 PetriNetUnfolder]: For 245804/246500 co-relation queries the response was YES. [2021-12-17 23:12:10,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124779 conditions, 24731 events. 13387/24731 cut-off events. For 245804/246500 co-relation queries the response was YES. Maximal size of possible extension queue 1426. Compared 225123 event pairs, 463 based on Foata normal form. 811/25411 useless extension candidates. Maximal degree in co-relation 104394. Up to 6565 conditions per place. [2021-12-17 23:12:10,675 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 499 selfloop transitions, 321 changer transitions 0/885 dead transitions. [2021-12-17 23:12:10,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 885 transitions, 13192 flow [2021-12-17 23:12:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:12:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:12:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2396 transitions. [2021-12-17 23:12:10,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7184407796101949 [2021-12-17 23:12:10,680 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2396 transitions. [2021-12-17 23:12:10,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2396 transitions. [2021-12-17 23:12:10,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:12:10,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2396 transitions. [2021-12-17 23:12:10,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 82.62068965517241) internal successors, (2396), 29 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:10,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:10,688 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:10,689 INFO L186 Difference]: Start difference. First operand has 168 places, 338 transitions, 4131 flow. Second operand 29 states and 2396 transitions. [2021-12-17 23:12:10,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 885 transitions, 13192 flow [2021-12-17 23:12:11,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 885 transitions, 12212 flow, removed 185 selfloop flow, removed 6 redundant places. [2021-12-17 23:12:11,273 INFO L242 Difference]: Finished difference. Result has 201 places, 546 transitions, 8320 flow [2021-12-17 23:12:11,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8320, PETRI_PLACES=201, PETRI_TRANSITIONS=546} [2021-12-17 23:12:11,274 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 98 predicate places. [2021-12-17 23:12:11,274 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 546 transitions, 8320 flow [2021-12-17 23:12:11,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.70588235294117) internal successors, (1338), 17 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:12:11,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:12:11,276 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] [2021-12-17 23:12:11,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:12:11,476 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,SelfDestructingSolverStorable8 [2021-12-17 23:12:11,477 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:12:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:12:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -951731101, now seen corresponding path program 5 times [2021-12-17 23:12:11,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:12:11,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607733851] [2021-12-17 23:12:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:12:11,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:12:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:12:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:12:12,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:12:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607733851] [2021-12-17 23:12:12,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607733851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:12:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727382010] [2021-12-17 23:12:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:12:12,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:12:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:12:12,750 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) [2021-12-17 23:12:12,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:12:12,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 23:12:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:12:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 23:12:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15