./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c --full-output -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 64ecef0c16969053cfa5e9d06400089ac2be3a4d -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 22:43:24,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 22:43:24,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 22:43:24,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 22:43:24,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 22:43:24,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 22:43:24,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 22:43:24,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 22:43:24,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 22:43:24,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 22:43:24,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 22:43:24,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 22:43:24,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 22:43:24,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 22:43:24,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 22:43:24,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 22:43:24,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 22:43:24,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 22:43:24,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 22:43:24,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 22:43:24,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 22:43:24,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 22:43:24,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 22:43:24,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 22:43:24,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 22:43:24,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 22:43:24,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 22:43:24,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 22:43:24,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 22:43:24,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 22:43:24,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 22:43:24,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 22:43:24,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 22:43:24,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 22:43:24,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 22:43:24,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 22:43:24,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 22:43:24,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 22:43:24,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 22:43:24,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 22:43:24,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 22:43:24,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 22:43:24,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 22:43:24,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 22:43:24,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 22:43:24,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 22:43:24,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 22:43:24,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 22:43:24,486 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 22:43:24,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 22:43:24,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 22:43:24,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 22:43:24,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 22:43:24,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 22:43:24,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 22:43:24,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 22:43:24,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 22:43:24,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 22:43:24,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 22:43:24,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 22:43:24,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 22:43:24,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 22:43:24,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 22:43:24,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 22:43:24,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:43:24,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 22:43:24,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 22:43:24,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 22:43:24,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 22:43:24,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 22:43:24,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 22:43:24,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 22:43:24,491 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64ecef0c16969053cfa5e9d06400089ac2be3a4d [2021-10-05 22:43:24,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 22:43:24,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 22:43:24,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 22:43:24,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 22:43:24,894 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 22:43:24,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-05 22:43:24,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde6a57c6/934c1e34454a453a8eb52f1ca9ae1603/FLAG2e6fe3ef9 [2021-10-05 22:43:25,606 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 22:43:25,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-05 22:43:25,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde6a57c6/934c1e34454a453a8eb52f1ca9ae1603/FLAG2e6fe3ef9 [2021-10-05 22:43:25,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde6a57c6/934c1e34454a453a8eb52f1ca9ae1603 [2021-10-05 22:43:25,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 22:43:25,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 22:43:25,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 22:43:25,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 22:43:25,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 22:43:25,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:43:25" (1/1) ... [2021-10-05 22:43:25,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379dbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:25, skipping insertion in model container [2021-10-05 22:43:25,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:43:25" (1/1) ... [2021-10-05 22:43:26,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 22:43:26,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 22:43:26,284 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c[2035,2048] [2021-10-05 22:43:26,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:43:26,304 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 22:43:26,354 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c[2035,2048] [2021-10-05 22:43:26,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:43:26,383 INFO L208 MainTranslator]: Completed translation [2021-10-05 22:43:26,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26 WrapperNode [2021-10-05 22:43:26,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 22:43:26,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 22:43:26,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 22:43:26,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 22:43:26,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 22:43:26,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 22:43:26,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 22:43:26,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 22:43:26,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 22:43:26,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 22:43:26,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 22:43:26,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 22:43:26,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (1/1) ... [2021-10-05 22:43:26,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:43:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:26,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 22:43:26,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 22:43:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 22:43:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 22:43:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 22:43:26,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 22:43:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 22:43:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 22:43:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 22:43:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 22:43:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 22:43:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 22:43:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 22:43:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 22:43:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 22:43:26,626 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 22:43:27,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 22:43:27,077 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-05 22:43:27,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:43:27 BoogieIcfgContainer [2021-10-05 22:43:27,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 22:43:27,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 22:43:27,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 22:43:27,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 22:43:27,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:43:25" (1/3) ... [2021-10-05 22:43:27,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e946e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:43:27, skipping insertion in model container [2021-10-05 22:43:27,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:43:26" (2/3) ... [2021-10-05 22:43:27,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e946e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:43:27, skipping insertion in model container [2021-10-05 22:43:27,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:43:27" (3/3) ... [2021-10-05 22:43:27,107 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.c [2021-10-05 22:43:27,122 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 22:43:27,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 22:43:27,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 22:43:27,123 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 22:43:27,186 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,189 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,190 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,190 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,190 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,190 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,191 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,191 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,191 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,191 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,192 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,195 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,195 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,196 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,196 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,196 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,196 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,196 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,200 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,200 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,201 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,201 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,201 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,201 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,202 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,202 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,202 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,203 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,203 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,203 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,203 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,204 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,207 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,207 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,208 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,208 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,209 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,209 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,215 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,215 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,215 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,216 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,216 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,219 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,219 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,219 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,219 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,220 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:43:27,230 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 22:43:27,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 22:43:27,293 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-05 22:43:27,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 22:43:27,310 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 22:43:27,332 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-05 22:43:27,335 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-05 22:43:27,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2021-10-05 22:43:27,388 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-10-05 22:43:27,388 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 22:43:27,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2021-10-05 22:43:27,395 INFO L116 LiptonReduction]: Number of co-enabled transitions 432 [2021-10-05 22:43:30,536 INFO L131 LiptonReduction]: Checked pairs total: 452 [2021-10-05 22:43:30,537 INFO L133 LiptonReduction]: Total number of compositions: 67 [2021-10-05 22:43:30,548 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-05 22:43:30,566 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:30,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:30,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:30,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1028856231, now seen corresponding path program 1 times [2021-10-05 22:43:30,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:30,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549629504] [2021-10-05 22:43:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:30,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:31,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:31,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549629504] [2021-10-05 22:43:31,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549629504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:31,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:31,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:31,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921912342] [2021-10-05 22:43:31,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:31,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:31,325 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:31,496 INFO L93 Difference]: Finished difference Result 71 states and 150 transitions. [2021-10-05 22:43:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:31,509 INFO L225 Difference]: With dead ends: 71 [2021-10-05 22:43:31,509 INFO L226 Difference]: Without dead ends: 66 [2021-10-05 22:43:31,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:43:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-05 22:43:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-10-05 22:43:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-10-05 22:43:31,551 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-10-05 22:43:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:31,552 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-10-05 22:43:31,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-10-05 22:43:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:31,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:31,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:31,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 22:43:31,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash -810634497, now seen corresponding path program 2 times [2021-10-05 22:43:31,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:31,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833823177] [2021-10-05 22:43:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:31,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:31,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:31,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833823177] [2021-10-05 22:43:31,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833823177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:31,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798642245] [2021-10-05 22:43:31,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:31,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:31,859 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:31,955 INFO L93 Difference]: Finished difference Result 85 states and 176 transitions. [2021-10-05 22:43:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:31,957 INFO L225 Difference]: With dead ends: 85 [2021-10-05 22:43:31,957 INFO L226 Difference]: Without dead ends: 80 [2021-10-05 22:43:31,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:43:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-05 22:43:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2021-10-05 22:43:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 111 transitions. [2021-10-05 22:43:31,968 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 111 transitions. Word has length 13 [2021-10-05 22:43:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:31,969 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 111 transitions. [2021-10-05 22:43:31,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 111 transitions. [2021-10-05 22:43:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:31,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:31,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:31,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 22:43:31,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1766583739, now seen corresponding path program 3 times [2021-10-05 22:43:31,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:31,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760578278] [2021-10-05 22:43:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:31,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:32,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:32,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760578278] [2021-10-05 22:43:32,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760578278] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:32,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:32,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:32,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286736045] [2021-10-05 22:43:32,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:32,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:32,252 INFO L87 Difference]: Start difference. First operand 50 states and 111 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:32,349 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2021-10-05 22:43:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:32,351 INFO L225 Difference]: With dead ends: 75 [2021-10-05 22:43:32,351 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 22:43:32,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:43:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 22:43:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-10-05 22:43:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-05 22:43:32,360 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-05 22:43:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:32,360 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-05 22:43:32,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-05 22:43:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:32,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:32,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:32,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 22:43:32,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1066742439, now seen corresponding path program 4 times [2021-10-05 22:43:32,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:32,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229231451] [2021-10-05 22:43:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:32,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:32,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:32,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229231451] [2021-10-05 22:43:32,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229231451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:32,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:32,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:32,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584075218] [2021-10-05 22:43:32,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:32,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:32,557 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:32,664 INFO L93 Difference]: Finished difference Result 75 states and 158 transitions. [2021-10-05 22:43:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:32,669 INFO L225 Difference]: With dead ends: 75 [2021-10-05 22:43:32,670 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 22:43:32,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:43:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 22:43:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-10-05 22:43:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2021-10-05 22:43:32,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 13 [2021-10-05 22:43:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:32,693 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2021-10-05 22:43:32,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2021-10-05 22:43:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:32,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:32,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:32,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 22:43:32,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -651006621, now seen corresponding path program 5 times [2021-10-05 22:43:32,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:32,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029827663] [2021-10-05 22:43:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:32,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:32,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:32,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029827663] [2021-10-05 22:43:32,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029827663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:32,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:32,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:32,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972311826] [2021-10-05 22:43:32,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:32,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:32,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:32,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:32,879 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:32,969 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2021-10-05 22:43:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:32,972 INFO L225 Difference]: With dead ends: 77 [2021-10-05 22:43:32,972 INFO L226 Difference]: Without dead ends: 72 [2021-10-05 22:43:32,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:43:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-05 22:43:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-10-05 22:43:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-10-05 22:43:32,978 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 13 [2021-10-05 22:43:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-10-05 22:43:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-10-05 22:43:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:43:32,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:32,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:32,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 22:43:32,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087561, now seen corresponding path program 6 times [2021-10-05 22:43:32,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:32,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193515153] [2021-10-05 22:43:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:32,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:33,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:33,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193515153] [2021-10-05 22:43:33,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193515153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:33,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:33,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:43:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523616397] [2021-10-05 22:43:33,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:43:33,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:43:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:43:33,204 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:33,306 INFO L93 Difference]: Finished difference Result 63 states and 133 transitions. [2021-10-05 22:43:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:43:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 22:43:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:33,308 INFO L225 Difference]: With dead ends: 63 [2021-10-05 22:43:33,308 INFO L226 Difference]: Without dead ends: 58 [2021-10-05 22:43:33,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:43:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-05 22:43:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-10-05 22:43:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-05 22:43:33,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-05 22:43:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-05 22:43:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-05 22:43:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:33,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:33,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:33,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-05 22:43:33,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -419627156, now seen corresponding path program 1 times [2021-10-05 22:43:33,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:33,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054536205] [2021-10-05 22:43:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:33,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:33,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:33,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054536205] [2021-10-05 22:43:33,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054536205] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:43:33,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:43:33,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:43:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033720763] [2021-10-05 22:43:33,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:43:33,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:43:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:43:33,353 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:33,358 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2021-10-05 22:43:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:43:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:33,360 INFO L225 Difference]: With dead ends: 52 [2021-10-05 22:43:33,360 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 22:43:33,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:43:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 22:43:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 22:43:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-05 22:43:33,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 14 [2021-10-05 22:43:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:33,365 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-05 22:43:33,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-05 22:43:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:33,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:33,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:33,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-05 22:43:33,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1268318728, now seen corresponding path program 1 times [2021-10-05 22:43:33,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:33,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161666918] [2021-10-05 22:43:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:33,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:33,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161666918] [2021-10-05 22:43:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161666918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763081944] [2021-10-05 22:43:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:33,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:33,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:33,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 22:43:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:33,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:34,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763081944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:34,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:34,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:34,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157551239] [2021-10-05 22:43:34,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:34,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:34,007 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:34,158 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-10-05 22:43:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:43:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:34,160 INFO L225 Difference]: With dead ends: 89 [2021-10-05 22:43:34,160 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 22:43:34,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:43:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 22:43:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-10-05 22:43:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.253731343283582) internal successors, (151), 67 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 151 transitions. [2021-10-05 22:43:34,165 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 151 transitions. Word has length 14 [2021-10-05 22:43:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 151 transitions. [2021-10-05 22:43:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 151 transitions. [2021-10-05 22:43:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:34,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:34,167 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:34,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:34,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:34,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:34,369 INFO L82 PathProgramCache]: Analyzing trace with hash -571172000, now seen corresponding path program 2 times [2021-10-05 22:43:34,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:34,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504977694] [2021-10-05 22:43:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:34,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:34,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:34,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504977694] [2021-10-05 22:43:34,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504977694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:34,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442466253] [2021-10-05 22:43:34,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:43:34,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:34,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:34,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 22:43:34,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:34,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442466253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:34,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:34,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:34,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352900392] [2021-10-05 22:43:34,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:34,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:34,903 INFO L87 Difference]: Start difference. First operand 68 states and 151 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:35,169 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-10-05 22:43:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 22:43:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:35,171 INFO L225 Difference]: With dead ends: 121 [2021-10-05 22:43:35,171 INFO L226 Difference]: Without dead ends: 116 [2021-10-05 22:43:35,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:43:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-05 22:43:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2021-10-05 22:43:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-05 22:43:35,177 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-05 22:43:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:35,177 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-05 22:43:35,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-05 22:43:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:35,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:35,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:35,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:35,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:35,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2006046236, now seen corresponding path program 3 times [2021-10-05 22:43:35,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:35,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433366742] [2021-10-05 22:43:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:35,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:35,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:35,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433366742] [2021-10-05 22:43:35,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433366742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:35,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115354711] [2021-10-05 22:43:35,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:43:35,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:35,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:35,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 22:43:35,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:43:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:35,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:35,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115354711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:35,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:35,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:35,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228385757] [2021-10-05 22:43:35,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:35,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:35,902 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:36,187 INFO L93 Difference]: Finished difference Result 119 states and 231 transitions. [2021-10-05 22:43:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 22:43:36,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:36,190 INFO L225 Difference]: With dead ends: 119 [2021-10-05 22:43:36,190 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 22:43:36,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:43:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 22:43:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-10-05 22:43:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-05 22:43:36,196 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-05 22:43:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:36,196 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-05 22:43:36,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-05 22:43:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:36,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:36,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:36,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:36,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:36,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1772714738, now seen corresponding path program 4 times [2021-10-05 22:43:36,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:36,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118646218] [2021-10-05 22:43:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:36,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:36,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:36,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118646218] [2021-10-05 22:43:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118646218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:36,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408585105] [2021-10-05 22:43:36,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:43:36,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:36,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 22:43:36,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:43:36,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:36,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408585105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:36,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:36,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:36,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769115493] [2021-10-05 22:43:36,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:36,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:36,905 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:37,007 INFO L93 Difference]: Finished difference Result 83 states and 180 transitions. [2021-10-05 22:43:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:43:37,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:37,009 INFO L225 Difference]: With dead ends: 83 [2021-10-05 22:43:37,009 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 22:43:37,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:43:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 22:43:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-10-05 22:43:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-05 22:43:37,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-05 22:43:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-05 22:43:37,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-05 22:43:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:37,029 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:37,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:37,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:37,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 22:43:37,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1204252256, now seen corresponding path program 5 times [2021-10-05 22:43:37,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:37,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889464711] [2021-10-05 22:43:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:37,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:37,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:37,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889464711] [2021-10-05 22:43:37,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889464711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:37,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987008068] [2021-10-05 22:43:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:43:37,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:37,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:37,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 22:43:37,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:37,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987008068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:37,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:37,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300777438] [2021-10-05 22:43:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:37,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:37,789 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:38,028 INFO L93 Difference]: Finished difference Result 103 states and 209 transitions. [2021-10-05 22:43:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:43:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:38,029 INFO L225 Difference]: With dead ends: 103 [2021-10-05 22:43:38,029 INFO L226 Difference]: Without dead ends: 98 [2021-10-05 22:43:38,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:43:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-05 22:43:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-10-05 22:43:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 69 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 157 transitions. [2021-10-05 22:43:38,035 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 157 transitions. Word has length 14 [2021-10-05 22:43:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:38,035 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 157 transitions. [2021-10-05 22:43:38,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 157 transitions. [2021-10-05 22:43:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:38,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:38,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:38,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:38,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:38,238 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1372965980, now seen corresponding path program 6 times [2021-10-05 22:43:38,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:38,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093202059] [2021-10-05 22:43:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:38,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:38,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:38,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093202059] [2021-10-05 22:43:38,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093202059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:38,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236188455] [2021-10-05 22:43:38,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:43:38,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:38,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:38,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:38,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 22:43:38,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:43:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:38,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236188455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:38,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147786321] [2021-10-05 22:43:38,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:38,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:38,769 INFO L87 Difference]: Start difference. First operand 70 states and 157 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:39,030 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-10-05 22:43:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:39,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:39,032 INFO L225 Difference]: With dead ends: 107 [2021-10-05 22:43:39,032 INFO L226 Difference]: Without dead ends: 102 [2021-10-05 22:43:39,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:43:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-05 22:43:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-10-05 22:43:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2021-10-05 22:43:39,037 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 14 [2021-10-05 22:43:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:39,038 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2021-10-05 22:43:39,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2021-10-05 22:43:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:39,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:39,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:39,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:39,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-05 22:43:39,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 591395430, now seen corresponding path program 7 times [2021-10-05 22:43:39,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:39,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808216218] [2021-10-05 22:43:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:39,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:39,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:39,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808216218] [2021-10-05 22:43:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808216218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:39,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360256030] [2021-10-05 22:43:39,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:43:39,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:39,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:39,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 22:43:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:39,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360256030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:39,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:39,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:39,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485934507] [2021-10-05 22:43:39,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:39,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:39,793 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:39,917 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2021-10-05 22:43:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:43:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:39,920 INFO L225 Difference]: With dead ends: 79 [2021-10-05 22:43:39,920 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 22:43:39,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:43:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 22:43:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-10-05 22:43:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-05 22:43:39,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-05 22:43:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:39,928 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-05 22:43:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-05 22:43:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:43:39,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:39,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:39,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:40,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-05 22:43:40,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2144342638, now seen corresponding path program 8 times [2021-10-05 22:43:40,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:40,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324739709] [2021-10-05 22:43:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:40,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:40,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:40,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324739709] [2021-10-05 22:43:40,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324739709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873891327] [2021-10-05 22:43:40,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:43:40,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:40,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:40,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 22:43:40,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:40,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:40,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873891327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:40,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 22:43:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876485063] [2021-10-05 22:43:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:40,668 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:40,787 INFO L93 Difference]: Finished difference Result 75 states and 155 transitions. [2021-10-05 22:43:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:43:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 22:43:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:40,790 INFO L225 Difference]: With dead ends: 75 [2021-10-05 22:43:40,790 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 22:43:40,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:43:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 22:43:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-10-05 22:43:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-05 22:43:40,794 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-05 22:43:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-05 22:43:40,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-05 22:43:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:40,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:40,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:40,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:41,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 22:43:41,011 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1586224341, now seen corresponding path program 1 times [2021-10-05 22:43:41,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:41,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843339199] [2021-10-05 22:43:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:41,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:41,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:41,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843339199] [2021-10-05 22:43:41,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843339199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:41,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589386775] [2021-10-05 22:43:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:41,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:41,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:41,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 22:43:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589386775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:41,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:41,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:41,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969002636] [2021-10-05 22:43:41,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:41,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:41,475 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:41,583 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-10-05 22:43:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:41,585 INFO L225 Difference]: With dead ends: 87 [2021-10-05 22:43:41,585 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 22:43:41,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:43:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 22:43:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-10-05 22:43:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-10-05 22:43:41,589 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 15 [2021-10-05 22:43:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:41,589 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-10-05 22:43:41,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-10-05 22:43:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:41,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:41,591 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:41,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:41,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:41,804 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash 101721543, now seen corresponding path program 9 times [2021-10-05 22:43:41,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:41,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504730815] [2021-10-05 22:43:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:41,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:41,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:41,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504730815] [2021-10-05 22:43:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504730815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:41,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224855576] [2021-10-05 22:43:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:43:41,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:41,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:41,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 22:43:42,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:43:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:42,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224855576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:42,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:42,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:42,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210994684] [2021-10-05 22:43:42,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:42,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:42,435 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:42,755 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-10-05 22:43:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 22:43:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:42,757 INFO L225 Difference]: With dead ends: 124 [2021-10-05 22:43:42,757 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 22:43:42,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-10-05 22:43:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 22:43:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2021-10-05 22:43:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-05 22:43:42,762 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-05 22:43:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:42,762 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-05 22:43:42,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-05 22:43:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:42,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:42,763 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:42,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 22:43:42,979 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1737769185, now seen corresponding path program 10 times [2021-10-05 22:43:42,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:42,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476009538] [2021-10-05 22:43:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:42,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:43,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:43,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476009538] [2021-10-05 22:43:43,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476009538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:43,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102898382] [2021-10-05 22:43:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:43:43,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:43,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:43,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 22:43:43,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:43:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:43,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102898382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:43,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:43,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:43,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605056489] [2021-10-05 22:43:43,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:43,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:43,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:43,694 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:44,197 INFO L93 Difference]: Finished difference Result 164 states and 331 transitions. [2021-10-05 22:43:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:43:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:44,199 INFO L225 Difference]: With dead ends: 164 [2021-10-05 22:43:44,199 INFO L226 Difference]: Without dead ends: 154 [2021-10-05 22:43:44,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-10-05 22:43:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-05 22:43:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 66. [2021-10-05 22:43:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 146 transitions. [2021-10-05 22:43:44,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 146 transitions. Word has length 15 [2021-10-05 22:43:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:44,211 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 146 transitions. [2021-10-05 22:43:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 146 transitions. [2021-10-05 22:43:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:44,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:44,212 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:44,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:44,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 22:43:44,426 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 839449051, now seen corresponding path program 11 times [2021-10-05 22:43:44,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:44,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70064724] [2021-10-05 22:43:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:44,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:44,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:44,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70064724] [2021-10-05 22:43:44,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70064724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:44,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946350366] [2021-10-05 22:43:44,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:43:44,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:44,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:44,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:44,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 22:43:44,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:45,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946350366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:45,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:45,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:45,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103337604] [2021-10-05 22:43:45,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:45,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:45,070 INFO L87 Difference]: Start difference. First operand 66 states and 146 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:45,552 INFO L93 Difference]: Finished difference Result 144 states and 299 transitions. [2021-10-05 22:43:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 22:43:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:45,555 INFO L225 Difference]: With dead ends: 144 [2021-10-05 22:43:45,555 INFO L226 Difference]: Without dead ends: 134 [2021-10-05 22:43:45,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-10-05 22:43:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-05 22:43:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 72. [2021-10-05 22:43:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-05 22:43:45,563 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-05 22:43:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:45,564 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-05 22:43:45,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-05 22:43:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:45,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:45,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:45,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-05 22:43:45,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:45,780 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1519105235, now seen corresponding path program 2 times [2021-10-05 22:43:45,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:45,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895212403] [2021-10-05 22:43:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:45,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:45,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:45,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895212403] [2021-10-05 22:43:45,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895212403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:45,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430410928] [2021-10-05 22:43:45,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:43:45,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:45,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:45,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:45,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 22:43:46,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:46,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:46,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:46,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430410928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:46,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:46,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:46,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77762975] [2021-10-05 22:43:46,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:46,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:46,353 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:46,499 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-10-05 22:43:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:46,501 INFO L225 Difference]: With dead ends: 101 [2021-10-05 22:43:46,501 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 22:43:46,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:43:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 22:43:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-05 22:43:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 73 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 175 transitions. [2021-10-05 22:43:46,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 175 transitions. Word has length 15 [2021-10-05 22:43:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 175 transitions. [2021-10-05 22:43:46,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 175 transitions. [2021-10-05 22:43:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:46,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:46,510 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:46,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-05 22:43:46,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-05 22:43:46,724 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash -439992313, now seen corresponding path program 12 times [2021-10-05 22:43:46,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:46,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706971535] [2021-10-05 22:43:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:46,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:46,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:46,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706971535] [2021-10-05 22:43:46,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706971535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:46,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577154826] [2021-10-05 22:43:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:43:46,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:46,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:46,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 22:43:47,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:43:47,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577154826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:47,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:47,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197774579] [2021-10-05 22:43:47,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:47,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:47,461 INFO L87 Difference]: Start difference. First operand 74 states and 175 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:47,995 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-10-05 22:43:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:43:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:47,997 INFO L225 Difference]: With dead ends: 168 [2021-10-05 22:43:47,997 INFO L226 Difference]: Without dead ends: 158 [2021-10-05 22:43:47,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-10-05 22:43:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-05 22:43:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 80. [2021-10-05 22:43:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.5063291139240507) internal successors, (198), 79 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2021-10-05 22:43:48,004 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 15 [2021-10-05 22:43:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:48,005 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2021-10-05 22:43:48,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2021-10-05 22:43:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:48,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:48,006 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:48,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:48,222 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2137225923, now seen corresponding path program 13 times [2021-10-05 22:43:48,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:48,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400633869] [2021-10-05 22:43:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:48,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:48,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:48,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400633869] [2021-10-05 22:43:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400633869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:48,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437219186] [2021-10-05 22:43:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:43:48,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:48,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:48,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 22:43:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437219186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:48,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:48,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288349929] [2021-10-05 22:43:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:48,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:48,944 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:49,416 INFO L93 Difference]: Finished difference Result 174 states and 351 transitions. [2021-10-05 22:43:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 22:43:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:49,419 INFO L225 Difference]: With dead ends: 174 [2021-10-05 22:43:49,419 INFO L226 Difference]: Without dead ends: 164 [2021-10-05 22:43:49,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-10-05 22:43:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-05 22:43:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 78. [2021-10-05 22:43:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4545454545454546) internal successors, (189), 77 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2021-10-05 22:43:49,425 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 15 [2021-10-05 22:43:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:49,425 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2021-10-05 22:43:49,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2021-10-05 22:43:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:49,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:49,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:49,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:49,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:49,642 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1426935105, now seen corresponding path program 3 times [2021-10-05 22:43:49,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:49,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22646461] [2021-10-05 22:43:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:49,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:49,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:49,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22646461] [2021-10-05 22:43:49,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22646461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:49,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565505291] [2021-10-05 22:43:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:43:49,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:49,776 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:49,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 22:43:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:43:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565505291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:50,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:50,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:50,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319249822] [2021-10-05 22:43:50,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:50,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:50,300 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:50,415 INFO L93 Difference]: Finished difference Result 111 states and 236 transitions. [2021-10-05 22:43:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:50,417 INFO L225 Difference]: With dead ends: 111 [2021-10-05 22:43:50,417 INFO L226 Difference]: Without dead ends: 102 [2021-10-05 22:43:50,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:43:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-05 22:43:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-10-05 22:43:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4556962025316458) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 194 transitions. [2021-10-05 22:43:50,422 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 194 transitions. Word has length 15 [2021-10-05 22:43:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:50,423 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 194 transitions. [2021-10-05 22:43:50,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 194 transitions. [2021-10-05 22:43:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:50,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:50,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:50,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-05 22:43:50,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-05 22:43:50,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash -290813955, now seen corresponding path program 4 times [2021-10-05 22:43:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:50,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962131620] [2021-10-05 22:43:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:50,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:50,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:50,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962131620] [2021-10-05 22:43:50,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962131620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:50,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237277244] [2021-10-05 22:43:50,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:43:50,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:50,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:50,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-05 22:43:51,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:43:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:51,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 22:43:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:51,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237277244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:51,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:51,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 22:43:51,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630635804] [2021-10-05 22:43:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:43:51,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:43:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:43:51,327 INFO L87 Difference]: Start difference. First operand 80 states and 194 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:51,496 INFO L93 Difference]: Finished difference Result 101 states and 222 transitions. [2021-10-05 22:43:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 22:43:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:51,498 INFO L225 Difference]: With dead ends: 101 [2021-10-05 22:43:51,498 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 22:43:51,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:43:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 22:43:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-05 22:43:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4556962025316458) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 194 transitions. [2021-10-05 22:43:51,502 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 194 transitions. Word has length 15 [2021-10-05 22:43:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:51,503 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 194 transitions. [2021-10-05 22:43:51,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 194 transitions. [2021-10-05 22:43:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:51,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:51,504 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:51,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:51,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:51,718 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1355655373, now seen corresponding path program 14 times [2021-10-05 22:43:51,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:51,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999890024] [2021-10-05 22:43:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:51,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:51,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:51,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999890024] [2021-10-05 22:43:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999890024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:51,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610736599] [2021-10-05 22:43:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:43:51,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:51,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:51,859 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:51,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-05 22:43:52,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:52,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610736599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:52,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 22:43:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135762473] [2021-10-05 22:43:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:43:52,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:43:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:43:52,443 INFO L87 Difference]: Start difference. First operand 80 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:52,818 INFO L93 Difference]: Finished difference Result 148 states and 304 transitions. [2021-10-05 22:43:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:43:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:52,820 INFO L225 Difference]: With dead ends: 148 [2021-10-05 22:43:52,820 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:43:52,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-10-05 22:43:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:43:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-10-05 22:43:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-05 22:43:52,825 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 15 [2021-10-05 22:43:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:52,825 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-05 22:43:52,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-05 22:43:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:52,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:52,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:52,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:53,027 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1199484693, now seen corresponding path program 5 times [2021-10-05 22:43:53,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:53,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526932267] [2021-10-05 22:43:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:53,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:53,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526932267] [2021-10-05 22:43:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526932267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698259385] [2021-10-05 22:43:53,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:43:53,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:53,135 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:53,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-05 22:43:53,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 22:43:53,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698259385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:53,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 22:43:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074288724] [2021-10-05 22:43:53,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:43:53,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:43:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:43:53,709 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:53,849 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-10-05 22:43:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:53,850 INFO L225 Difference]: With dead ends: 101 [2021-10-05 22:43:53,850 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 22:43:53,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:43:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 22:43:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-05 22:43:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 162 transitions. [2021-10-05 22:43:53,855 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 162 transitions. Word has length 15 [2021-10-05 22:43:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:53,855 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 162 transitions. [2021-10-05 22:43:53,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 162 transitions. [2021-10-05 22:43:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:53,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:53,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:53,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:54,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-05 22:43:54,057 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1291654823, now seen corresponding path program 6 times [2021-10-05 22:43:54,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:54,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271725957] [2021-10-05 22:43:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:54,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:54,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:54,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271725957] [2021-10-05 22:43:54,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271725957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:54,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204529845] [2021-10-05 22:43:54,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:43:54,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:54,166 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:54,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-05 22:43:54,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:43:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:54,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204529845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:54,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:54,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:43:54,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724049265] [2021-10-05 22:43:54,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:43:54,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:43:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:43:54,748 INFO L87 Difference]: Start difference. First operand 74 states and 162 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:54,841 INFO L93 Difference]: Finished difference Result 93 states and 190 transitions. [2021-10-05 22:43:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:54,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:54,842 INFO L225 Difference]: With dead ends: 93 [2021-10-05 22:43:54,842 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 22:43:54,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:43:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 22:43:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-10-05 22:43:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2266666666666666) internal successors, (167), 75 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 167 transitions. [2021-10-05 22:43:54,847 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 167 transitions. Word has length 15 [2021-10-05 22:43:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 167 transitions. [2021-10-05 22:43:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 167 transitions. [2021-10-05 22:43:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:54,848 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:54,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:54,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:55,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-05 22:43:55,050 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1285563413, now seen corresponding path program 7 times [2021-10-05 22:43:55,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:55,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396951563] [2021-10-05 22:43:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:55,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:55,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396951563] [2021-10-05 22:43:55,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396951563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917510265] [2021-10-05 22:43:55,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:43:55,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:55,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:55,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:55,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-05 22:43:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:55,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917510265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:55,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:55,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:43:55,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701552616] [2021-10-05 22:43:55,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:43:55,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:43:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:43:55,726 INFO L87 Difference]: Start difference. First operand 76 states and 167 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:55,854 INFO L93 Difference]: Finished difference Result 83 states and 176 transitions. [2021-10-05 22:43:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:55,855 INFO L225 Difference]: With dead ends: 83 [2021-10-05 22:43:55,855 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 22:43:55,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:43:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 22:43:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-05 22:43:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.211267605633803) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 157 transitions. [2021-10-05 22:43:55,859 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 157 transitions. Word has length 15 [2021-10-05 22:43:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:55,860 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 157 transitions. [2021-10-05 22:43:55,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 157 transitions. [2021-10-05 22:43:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:55,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:55,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:55,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-05 22:43:56,068 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash -926513517, now seen corresponding path program 8 times [2021-10-05 22:43:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:56,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070956461] [2021-10-05 22:43:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:56,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:56,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:56,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070956461] [2021-10-05 22:43:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070956461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:56,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403282682] [2021-10-05 22:43:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:43:56,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:56,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:56,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-05 22:43:56,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:43:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:43:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403282682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:56,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:56,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:43:56,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149657107] [2021-10-05 22:43:56,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:43:56,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:43:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:43:56,735 INFO L87 Difference]: Start difference. First operand 72 states and 157 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:56,851 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2021-10-05 22:43:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:43:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:56,852 INFO L225 Difference]: With dead ends: 91 [2021-10-05 22:43:56,853 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 22:43:56,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:43:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 22:43:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-10-05 22:43:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2021-10-05 22:43:56,857 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 15 [2021-10-05 22:43:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:56,857 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2021-10-05 22:43:56,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2021-10-05 22:43:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:56,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:56,858 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:56,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-05 22:43:57,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-05 22:43:57,071 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1409356231, now seen corresponding path program 15 times [2021-10-05 22:43:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:57,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985245495] [2021-10-05 22:43:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:57,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:57,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:57,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985245495] [2021-10-05 22:43:57,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985245495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:57,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206082084] [2021-10-05 22:43:57,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:43:57,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:57,255 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:57,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-05 22:43:57,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:43:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:57,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:57,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:57,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206082084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:57,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:57,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 22:43:57,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389265423] [2021-10-05 22:43:57,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:43:57,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:57,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:43:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:43:57,925 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:58,292 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-10-05 22:43:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 22:43:58,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:58,294 INFO L225 Difference]: With dead ends: 116 [2021-10-05 22:43:58,294 INFO L226 Difference]: Without dead ends: 106 [2021-10-05 22:43:58,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-05 22:43:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-05 22:43:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-10-05 22:43:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 69 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 157 transitions. [2021-10-05 22:43:58,298 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 157 transitions. Word has length 15 [2021-10-05 22:43:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:58,299 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 157 transitions. [2021-10-05 22:43:58,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 157 transitions. [2021-10-05 22:43:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:58,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:58,300 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:58,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-05 22:43:58,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:58,505 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:43:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:43:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -308392829, now seen corresponding path program 16 times [2021-10-05 22:43:58,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:43:58,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135569284] [2021-10-05 22:43:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:43:58,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:43:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:43:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:58,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:43:58,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135569284] [2021-10-05 22:43:58,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135569284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:58,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265989437] [2021-10-05 22:43:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:43:58,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:43:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:43:58,682 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:43:58,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-05 22:43:59,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:43:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:43:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:43:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:43:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:43:59,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265989437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:43:59,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:43:59,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 22:43:59,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082177998] [2021-10-05 22:43:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:43:59,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:43:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:43:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:43:59,348 INFO L87 Difference]: Start difference. First operand 70 states and 157 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:43:59,785 INFO L93 Difference]: Finished difference Result 124 states and 237 transitions. [2021-10-05 22:43:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 22:43:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:43:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:43:59,787 INFO L225 Difference]: With dead ends: 124 [2021-10-05 22:43:59,787 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 22:43:59,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 427.5ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-10-05 22:43:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 22:43:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-10-05 22:43:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3380281690140845) internal successors, (166), 71 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 166 transitions. [2021-10-05 22:43:59,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 166 transitions. Word has length 15 [2021-10-05 22:43:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:43:59,792 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 166 transitions. [2021-10-05 22:43:59,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:43:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 166 transitions. [2021-10-05 22:43:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:43:59,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:43:59,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:43:59,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-05 22:44:00,009 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1018683647, now seen corresponding path program 9 times [2021-10-05 22:44:00,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:00,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217092052] [2021-10-05 22:44:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:00,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:00,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:00,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217092052] [2021-10-05 22:44:00,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217092052] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:00,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549020140] [2021-10-05 22:44:00,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:00,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:00,118 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:00,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-05 22:44:00,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:44:00,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:44:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:00,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549020140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:00,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:00,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:44:00,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96455496] [2021-10-05 22:44:00,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:44:00,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:44:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:44:00,726 INFO L87 Difference]: Start difference. First operand 72 states and 166 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:00,843 INFO L93 Difference]: Finished difference Result 89 states and 186 transitions. [2021-10-05 22:44:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:44:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:44:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:00,845 INFO L225 Difference]: With dead ends: 89 [2021-10-05 22:44:00,845 INFO L226 Difference]: Without dead ends: 80 [2021-10-05 22:44:00,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-05 22:44:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-10-05 22:44:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.343283582089552) internal successors, (157), 67 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 157 transitions. [2021-10-05 22:44:00,856 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 157 transitions. Word has length 15 [2021-10-05 22:44:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 157 transitions. [2021-10-05 22:44:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 157 transitions. [2021-10-05 22:44:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:44:00,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:00,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:00,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:01,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:01,074 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1558534589, now seen corresponding path program 10 times [2021-10-05 22:44:01,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:01,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508520341] [2021-10-05 22:44:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:01,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:01,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:01,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508520341] [2021-10-05 22:44:01,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508520341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:01,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39054354] [2021-10-05 22:44:01,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:01,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:01,200 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:01,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-05 22:44:01,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 22:44:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:01,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39054354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:01,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:01,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 22:44:01,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843818189] [2021-10-05 22:44:01,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:01,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:01,908 INFO L87 Difference]: Start difference. First operand 68 states and 157 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:02,024 INFO L93 Difference]: Finished difference Result 79 states and 172 transitions. [2021-10-05 22:44:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:44:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:44:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:02,026 INFO L225 Difference]: With dead ends: 79 [2021-10-05 22:44:02,026 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 22:44:02,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:44:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 22:44:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-10-05 22:44:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3384615384615386) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2021-10-05 22:44:02,029 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 15 [2021-10-05 22:44:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:02,030 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2021-10-05 22:44:02,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2021-10-05 22:44:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:44:02,030 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:02,030 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:02,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:02,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:02,231 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1089963379, now seen corresponding path program 17 times [2021-10-05 22:44:02,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717080244] [2021-10-05 22:44:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:02,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:02,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717080244] [2021-10-05 22:44:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717080244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803791153] [2021-10-05 22:44:02,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:02,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:02,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:02,377 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:02,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-05 22:44:02,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:03,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803791153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:03,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:03,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 22:44:03,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881642234] [2021-10-05 22:44:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:03,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:03,120 INFO L87 Difference]: Start difference. First operand 66 states and 152 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:03,512 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-10-05 22:44:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:03,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:44:03,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:03,514 INFO L225 Difference]: With dead ends: 110 [2021-10-05 22:44:03,514 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 22:44:03,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-05 22:44:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 22:44:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-10-05 22:44:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-10-05 22:44:03,518 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2021-10-05 22:44:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:03,519 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-10-05 22:44:03,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-10-05 22:44:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:44:03,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:03,520 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:03,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:03,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-05 22:44:03,727 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1542619159, now seen corresponding path program 18 times [2021-10-05 22:44:03,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:03,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888534082] [2021-10-05 22:44:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:03,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:03,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:03,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888534082] [2021-10-05 22:44:03,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888534082] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:03,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85277710] [2021-10-05 22:44:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:03,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:03,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:03,881 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:03,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-05 22:44:04,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:44:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:04,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85277710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:04,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:04,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:44:04,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276153296] [2021-10-05 22:44:04,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:44:04,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:44:04,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:44:04,543 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:04,734 INFO L93 Difference]: Finished difference Result 74 states and 143 transitions. [2021-10-05 22:44:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 22:44:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:44:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:04,735 INFO L225 Difference]: With dead ends: 74 [2021-10-05 22:44:04,735 INFO L226 Difference]: Without dead ends: 54 [2021-10-05 22:44:04,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-05 22:44:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-05 22:44:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-10-05 22:44:04,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 15 [2021-10-05 22:44:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:04,739 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-10-05 22:44:04,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-10-05 22:44:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:04,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:04,740 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:04,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:04,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-05 22:44:04,941 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash 903968588, now seen corresponding path program 11 times [2021-10-05 22:44:04,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:04,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982550819] [2021-10-05 22:44:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:04,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:05,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:05,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982550819] [2021-10-05 22:44:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982550819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:05,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800289244] [2021-10-05 22:44:05,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:05,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:05,067 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:05,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-05 22:44:05,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:05,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:05,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800289244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:05,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:05,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743721896] [2021-10-05 22:44:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:05,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:05,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:05,828 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:06,061 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-10-05 22:44:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:06,063 INFO L225 Difference]: With dead ends: 106 [2021-10-05 22:44:06,063 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 22:44:06,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-10-05 22:44:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 22:44:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-05 22:44:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-10-05 22:44:06,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-10-05 22:44:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:06,068 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-10-05 22:44:06,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-10-05 22:44:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:06,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:06,069 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:06,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:06,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:06,270 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -285669132, now seen corresponding path program 12 times [2021-10-05 22:44:06,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:06,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32163430] [2021-10-05 22:44:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:06,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:06,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:06,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32163430] [2021-10-05 22:44:06,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32163430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191616399] [2021-10-05 22:44:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:06,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:06,396 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:06,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-05 22:44:06,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:44:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191616399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:07,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:07,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:07,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6835448] [2021-10-05 22:44:07,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:07,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:07,137 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:07,383 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-10-05 22:44:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:44:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:07,385 INFO L225 Difference]: With dead ends: 132 [2021-10-05 22:44:07,385 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:44:07,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-10-05 22:44:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:44:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-05 22:44:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-10-05 22:44:07,389 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 16 [2021-10-05 22:44:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:07,390 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-10-05 22:44:07,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-10-05 22:44:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:07,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:07,391 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:07,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:07,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-05 22:44:07,599 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash -377839262, now seen corresponding path program 13 times [2021-10-05 22:44:07,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:07,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700053070] [2021-10-05 22:44:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:07,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:07,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:07,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700053070] [2021-10-05 22:44:07,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700053070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:07,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929519198] [2021-10-05 22:44:07,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:07,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:07,733 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:07,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-05 22:44:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929519198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:08,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:08,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165847275] [2021-10-05 22:44:08,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:08,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:08,451 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:08,723 INFO L93 Difference]: Finished difference Result 152 states and 304 transitions. [2021-10-05 22:44:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 22:44:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:08,725 INFO L225 Difference]: With dead ends: 152 [2021-10-05 22:44:08,726 INFO L226 Difference]: Without dead ends: 142 [2021-10-05 22:44:08,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-05 22:44:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-05 22:44:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2021-10-05 22:44:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-05 22:44:08,736 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-05 22:44:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:08,736 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-05 22:44:08,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-05 22:44:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:08,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:08,739 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:08,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:08,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-05 22:44:08,940 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2095588322, now seen corresponding path program 14 times [2021-10-05 22:44:08,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:08,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303255606] [2021-10-05 22:44:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:08,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:09,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303255606] [2021-10-05 22:44:09,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303255606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61104042] [2021-10-05 22:44:09,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:44:09,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:09,075 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:09,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-05 22:44:09,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:09,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61104042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:09,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:09,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760393108] [2021-10-05 22:44:09,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:09,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:09,839 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:10,105 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-10-05 22:44:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:10,107 INFO L225 Difference]: With dead ends: 128 [2021-10-05 22:44:10,107 INFO L226 Difference]: Without dead ends: 118 [2021-10-05 22:44:10,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-10-05 22:44:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-05 22:44:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-10-05 22:44:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-05 22:44:10,112 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-05 22:44:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:10,112 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-05 22:44:10,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-05 22:44:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:10,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:10,113 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:10,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:10,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-05 22:44:10,314 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:10,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1371785798, now seen corresponding path program 15 times [2021-10-05 22:44:10,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:10,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139720269] [2021-10-05 22:44:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:10,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:10,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139720269] [2021-10-05 22:44:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139720269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264118478] [2021-10-05 22:44:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:10,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:10,442 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:10,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-05 22:44:10,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:44:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:10,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:11,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264118478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:11,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:11,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:11,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136874465] [2021-10-05 22:44:11,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:11,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:11,194 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:11,463 INFO L93 Difference]: Finished difference Result 178 states and 370 transitions. [2021-10-05 22:44:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 22:44:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:11,465 INFO L225 Difference]: With dead ends: 178 [2021-10-05 22:44:11,466 INFO L226 Difference]: Without dead ends: 168 [2021-10-05 22:44:11,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-05 22:44:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-05 22:44:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2021-10-05 22:44:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4285714285714284) internal successors, (255), 105 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 255 transitions. [2021-10-05 22:44:11,471 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 255 transitions. Word has length 16 [2021-10-05 22:44:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:11,471 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 255 transitions. [2021-10-05 22:44:11,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 255 transitions. [2021-10-05 22:44:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:11,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:11,473 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:11,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:11,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-05 22:44:11,688 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash -345963262, now seen corresponding path program 16 times [2021-10-05 22:44:11,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:11,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723246289] [2021-10-05 22:44:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:11,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:11,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:11,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723246289] [2021-10-05 22:44:11,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723246289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:11,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99182005] [2021-10-05 22:44:11,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:11,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:11,819 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-05 22:44:12,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-05 22:44:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:12,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99182005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:12,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:12,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-05 22:44:12,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695702408] [2021-10-05 22:44:12,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:44:12,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:44:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:44:12,660 INFO L87 Difference]: Start difference. First operand 106 states and 255 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:13,021 INFO L93 Difference]: Finished difference Result 182 states and 372 transitions. [2021-10-05 22:44:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:13,023 INFO L225 Difference]: With dead ends: 182 [2021-10-05 22:44:13,023 INFO L226 Difference]: Without dead ends: 172 [2021-10-05 22:44:13,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-05 22:44:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-05 22:44:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 102. [2021-10-05 22:44:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3465346534653464) internal successors, (237), 101 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 237 transitions. [2021-10-05 22:44:13,029 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 237 transitions. Word has length 16 [2021-10-05 22:44:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 237 transitions. [2021-10-05 22:44:13,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 237 transitions. [2021-10-05 22:44:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:13,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:13,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:13,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:13,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:13,257 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1127533812, now seen corresponding path program 17 times [2021-10-05 22:44:13,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:13,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637155227] [2021-10-05 22:44:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:13,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:13,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:13,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637155227] [2021-10-05 22:44:13,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637155227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:13,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100377172] [2021-10-05 22:44:13,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:13,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:13,372 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:13,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-05 22:44:13,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 22:44:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:14,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100377172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:14,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:14,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 22:44:14,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707040615] [2021-10-05 22:44:14,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 22:44:14,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:14,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 22:44:14,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:44:14,162 INFO L87 Difference]: Start difference. First operand 102 states and 237 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:14,429 INFO L93 Difference]: Finished difference Result 140 states and 296 transitions. [2021-10-05 22:44:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 22:44:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:14,431 INFO L225 Difference]: With dead ends: 140 [2021-10-05 22:44:14,431 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:44:14,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-10-05 22:44:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:44:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-10-05 22:44:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-10-05 22:44:14,437 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 16 [2021-10-05 22:44:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:14,437 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-10-05 22:44:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-10-05 22:44:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:14,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:14,438 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:14,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:14,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-05 22:44:14,652 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1381200908, now seen corresponding path program 18 times [2021-10-05 22:44:14,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:14,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889921770] [2021-10-05 22:44:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:14,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:14,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:14,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889921770] [2021-10-05 22:44:14,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889921770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:14,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84269547] [2021-10-05 22:44:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:14,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:14,767 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:14,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-05 22:44:15,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:44:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:15,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:15,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84269547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:15,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:15,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:15,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372854544] [2021-10-05 22:44:15,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:15,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:15,567 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:15,779 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2021-10-05 22:44:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 22:44:15,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:15,780 INFO L225 Difference]: With dead ends: 142 [2021-10-05 22:44:15,780 INFO L226 Difference]: Without dead ends: 132 [2021-10-05 22:44:15,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-05 22:44:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-10-05 22:44:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-05 22:44:15,785 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-05 22:44:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:15,785 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-05 22:44:15,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-05 22:44:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:15,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:15,787 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:15,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-05 22:44:16,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:16,001 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1473371038, now seen corresponding path program 19 times [2021-10-05 22:44:16,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:16,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415117618] [2021-10-05 22:44:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:16,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:16,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415117618] [2021-10-05 22:44:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415117618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402689787] [2021-10-05 22:44:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:16,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:16,133 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-05 22:44:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:16,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402689787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:16,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:16,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:16,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125425106] [2021-10-05 22:44:16,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:16,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:16,947 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:17,191 INFO L93 Difference]: Finished difference Result 174 states and 348 transitions. [2021-10-05 22:44:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:17,193 INFO L225 Difference]: With dead ends: 174 [2021-10-05 22:44:17,193 INFO L226 Difference]: Without dead ends: 164 [2021-10-05 22:44:17,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-05 22:44:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 106. [2021-10-05 22:44:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3142857142857145) internal successors, (243), 105 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 243 transitions. [2021-10-05 22:44:17,198 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 243 transitions. Word has length 16 [2021-10-05 22:44:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:17,199 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 243 transitions. [2021-10-05 22:44:17,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 243 transitions. [2021-10-05 22:44:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:17,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:17,200 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:17,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:17,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-05 22:44:17,415 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1103847198, now seen corresponding path program 20 times [2021-10-05 22:44:17,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:17,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351066722] [2021-10-05 22:44:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:17,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:17,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:17,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351066722] [2021-10-05 22:44:17,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351066722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:17,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284557166] [2021-10-05 22:44:17,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:44:17,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:17,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:17,550 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:17,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-05 22:44:18,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:18,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284557166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:18,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:18,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:18,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874996329] [2021-10-05 22:44:18,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:18,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:18,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:18,383 INFO L87 Difference]: Start difference. First operand 106 states and 243 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:18,617 INFO L93 Difference]: Finished difference Result 150 states and 309 transitions. [2021-10-05 22:44:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:18,619 INFO L225 Difference]: With dead ends: 150 [2021-10-05 22:44:18,619 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 22:44:18,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 22:44:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-10-05 22:44:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-10-05 22:44:18,624 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 16 [2021-10-05 22:44:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:18,624 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-10-05 22:44:18,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-10-05 22:44:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:18,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:18,626 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:18,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:18,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:18,835 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1509029044, now seen corresponding path program 21 times [2021-10-05 22:44:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:18,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119847670] [2021-10-05 22:44:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:18,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:18,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:18,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119847670] [2021-10-05 22:44:18,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119847670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:18,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369268114] [2021-10-05 22:44:18,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:18,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:18,951 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:18,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-05 22:44:19,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:44:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:19,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:19,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369268114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:19,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:19,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:19,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594455956] [2021-10-05 22:44:19,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:19,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:19,783 INFO L87 Difference]: Start difference. First operand 94 states and 203 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:19,990 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-10-05 22:44:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 22:44:19,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:19,991 INFO L225 Difference]: With dead ends: 134 [2021-10-05 22:44:19,991 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 22:44:19,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 22:44:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2021-10-05 22:44:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 217 transitions. [2021-10-05 22:44:19,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 217 transitions. Word has length 16 [2021-10-05 22:44:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 217 transitions. [2021-10-05 22:44:19,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 217 transitions. [2021-10-05 22:44:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:19,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:19,998 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:20,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:20,212 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1601199174, now seen corresponding path program 22 times [2021-10-05 22:44:20,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:20,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112551630] [2021-10-05 22:44:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:20,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:20,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:20,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112551630] [2021-10-05 22:44:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112551630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:20,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741355967] [2021-10-05 22:44:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:20,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:20,349 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:20,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-05 22:44:20,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:20,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:21,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741355967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:21,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:21,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:21,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091439429] [2021-10-05 22:44:21,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:21,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:21,215 INFO L87 Difference]: Start difference. First operand 98 states and 217 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:21,441 INFO L93 Difference]: Finished difference Result 170 states and 344 transitions. [2021-10-05 22:44:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:21,444 INFO L225 Difference]: With dead ends: 170 [2021-10-05 22:44:21,444 INFO L226 Difference]: Without dead ends: 160 [2021-10-05 22:44:21,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-05 22:44:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2021-10-05 22:44:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 22:44:21,450 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 22:44:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:21,450 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 22:44:21,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 22:44:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:21,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:21,452 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:21,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-05 22:44:21,664 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash 976019062, now seen corresponding path program 23 times [2021-10-05 22:44:21,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:21,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203100915] [2021-10-05 22:44:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:21,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:21,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:21,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203100915] [2021-10-05 22:44:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203100915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:21,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748833025] [2021-10-05 22:44:21,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:21,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:21,805 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:21,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-05 22:44:22,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 22:44:22,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:22,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748833025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:22,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:22,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:22,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72083288] [2021-10-05 22:44:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:22,639 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:22,920 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-10-05 22:44:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:44:22,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:22,922 INFO L225 Difference]: With dead ends: 146 [2021-10-05 22:44:22,922 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 22:44:22,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-10-05 22:44:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 22:44:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2021-10-05 22:44:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 22:44:22,928 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 22:44:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:22,928 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 22:44:22,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 22:44:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:22,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:22,929 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:22,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-05 22:44:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-05 22:44:23,147 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1427951482, now seen corresponding path program 24 times [2021-10-05 22:44:23,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:23,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372158973] [2021-10-05 22:44:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:23,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:23,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:23,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372158973] [2021-10-05 22:44:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372158973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:23,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879989238] [2021-10-05 22:44:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:23,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:23,280 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:23,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-05 22:44:23,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:44:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:23,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879989238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:24,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129122134] [2021-10-05 22:44:24,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:24,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:24,182 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:24,449 INFO L93 Difference]: Finished difference Result 172 states and 358 transitions. [2021-10-05 22:44:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:24,451 INFO L225 Difference]: With dead ends: 172 [2021-10-05 22:44:24,451 INFO L226 Difference]: Without dead ends: 162 [2021-10-05 22:44:24,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-05 22:44:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 106. [2021-10-05 22:44:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 105 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 253 transitions. [2021-10-05 22:44:24,457 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 253 transitions. Word has length 16 [2021-10-05 22:44:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:24,457 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 253 transitions. [2021-10-05 22:44:24,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 253 transitions. [2021-10-05 22:44:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:24,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:24,458 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:24,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:24,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-05 22:44:24,672 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1149266754, now seen corresponding path program 25 times [2021-10-05 22:44:24,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:24,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83705518] [2021-10-05 22:44:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:24,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:24,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:24,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83705518] [2021-10-05 22:44:24,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83705518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:24,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062528348] [2021-10-05 22:44:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:24,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:24,793 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:24,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-05 22:44:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:25,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062528348] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:25,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:25,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:25,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487221060] [2021-10-05 22:44:25,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:25,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:25,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:25,682 INFO L87 Difference]: Start difference. First operand 106 states and 253 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:25,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:25,952 INFO L93 Difference]: Finished difference Result 176 states and 360 transitions. [2021-10-05 22:44:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:25,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:25,954 INFO L225 Difference]: With dead ends: 176 [2021-10-05 22:44:25,954 INFO L226 Difference]: Without dead ends: 166 [2021-10-05 22:44:25,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-05 22:44:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 102. [2021-10-05 22:44:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 22:44:25,958 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 22:44:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:25,959 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 22:44:25,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 22:44:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:44:25,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:25,960 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:25,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-05 22:44:26,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:26,164 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 367696204, now seen corresponding path program 26 times [2021-10-05 22:44:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:26,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245859326] [2021-10-05 22:44:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:26,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:26,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245859326] [2021-10-05 22:44:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245859326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425151870] [2021-10-05 22:44:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:44:26,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:26,277 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:26,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-05 22:44:26,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:26,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 22:44:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425151870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:27,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 22:44:27,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920337002] [2021-10-05 22:44:27,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:44:27,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:44:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:44:27,171 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:27,388 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-10-05 22:44:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:44:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:27,390 INFO L225 Difference]: With dead ends: 134 [2021-10-05 22:44:27,390 INFO L226 Difference]: Without dead ends: 116 [2021-10-05 22:44:27,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-05 22:44:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-05 22:44:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-10-05 22:44:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 187 transitions. [2021-10-05 22:44:27,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 187 transitions. Word has length 16 [2021-10-05 22:44:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 187 transitions. [2021-10-05 22:44:27,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 187 transitions. [2021-10-05 22:44:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:27,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:27,394 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:27,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:27,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:27,595 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash 3823207, now seen corresponding path program 27 times [2021-10-05 22:44:27,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:27,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241711202] [2021-10-05 22:44:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:27,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:27,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:27,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241711202] [2021-10-05 22:44:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241711202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:27,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161619164] [2021-10-05 22:44:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:27,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:27,725 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:27,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-05 22:44:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:44:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161619164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:28,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:28,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 22:44:28,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114087027] [2021-10-05 22:44:28,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:44:28,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:28,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:44:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:44:28,692 INFO L87 Difference]: Start difference. First operand 86 states and 187 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:29,041 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-10-05 22:44:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:44:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:29,042 INFO L225 Difference]: With dead ends: 120 [2021-10-05 22:44:29,042 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 22:44:29,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-10-05 22:44:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 22:44:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-05 22:44:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2021-10-05 22:44:29,046 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 17 [2021-10-05 22:44:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:29,046 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2021-10-05 22:44:29,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2021-10-05 22:44:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:29,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:29,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:29,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-05 22:44:29,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:29,248 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1779759551, now seen corresponding path program 28 times [2021-10-05 22:44:29,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:29,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34074310] [2021-10-05 22:44:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:29,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:29,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:29,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34074310] [2021-10-05 22:44:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34074310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:29,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954298646] [2021-10-05 22:44:29,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:29,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:29,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:29,377 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:29,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-05 22:44:30,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:30,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 22:44:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954298646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:30,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:30,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 22:44:30,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632188361] [2021-10-05 22:44:30,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 22:44:30,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:30,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 22:44:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:30,458 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:30,942 INFO L93 Difference]: Finished difference Result 122 states and 244 transitions. [2021-10-05 22:44:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 22:44:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:30,944 INFO L225 Difference]: With dead ends: 122 [2021-10-05 22:44:30,944 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 22:44:30,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 22:44:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 22:44:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-10-05 22:44:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2021-10-05 22:44:30,948 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 17 [2021-10-05 22:44:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2021-10-05 22:44:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2021-10-05 22:44:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:30,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:30,949 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:30,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:31,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:31,163 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1077514479, now seen corresponding path program 29 times [2021-10-05 22:44:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:31,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306403831] [2021-10-05 22:44:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:31,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:31,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:31,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306403831] [2021-10-05 22:44:31,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306403831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:31,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399666557] [2021-10-05 22:44:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:31,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:31,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:31,312 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:31,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-05 22:44:32,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 22:44:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:32,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399666557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:32,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:32,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 22:44:32,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903837057] [2021-10-05 22:44:32,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 22:44:32,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 22:44:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:32,372 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:32,947 INFO L93 Difference]: Finished difference Result 148 states and 297 transitions. [2021-10-05 22:44:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 22:44:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:32,949 INFO L225 Difference]: With dead ends: 148 [2021-10-05 22:44:32,949 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:44:32,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 22:44:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:44:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-05 22:44:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 85 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 195 transitions. [2021-10-05 22:44:32,954 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 195 transitions. Word has length 17 [2021-10-05 22:44:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:32,954 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 195 transitions. [2021-10-05 22:44:32,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 195 transitions. [2021-10-05 22:44:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:32,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:32,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:32,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-05 22:44:33,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-05 22:44:33,169 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1169684609, now seen corresponding path program 30 times [2021-10-05 22:44:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:33,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851231136] [2021-10-05 22:44:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:33,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:33,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:33,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851231136] [2021-10-05 22:44:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851231136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:33,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982081610] [2021-10-05 22:44:33,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:33,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:33,313 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:33,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-05 22:44:34,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 22:44:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:34,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982081610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:34,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:34,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 22:44:34,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192677601] [2021-10-05 22:44:34,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:44:34,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:44:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:44:34,360 INFO L87 Difference]: Start difference. First operand 86 states and 195 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:34,760 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-10-05 22:44:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:34,762 INFO L225 Difference]: With dead ends: 124 [2021-10-05 22:44:34,763 INFO L226 Difference]: Without dead ends: 106 [2021-10-05 22:44:34,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-05 22:44:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-05 22:44:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-10-05 22:44:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 87 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 198 transitions. [2021-10-05 22:44:34,766 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 198 transitions. Word has length 17 [2021-10-05 22:44:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:34,767 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 198 transitions. [2021-10-05 22:44:34,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 198 transitions. [2021-10-05 22:44:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:34,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:34,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:34,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:34,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-05 22:44:34,968 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1407533627, now seen corresponding path program 31 times [2021-10-05 22:44:34,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:34,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684689334] [2021-10-05 22:44:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:34,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:35,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:35,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684689334] [2021-10-05 22:44:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684689334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:35,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819064932] [2021-10-05 22:44:35,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:35,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:35,112 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-05 22:44:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:36,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819064932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:36,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:36,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 22:44:36,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034129782] [2021-10-05 22:44:36,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:44:36,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:44:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:44:36,172 INFO L87 Difference]: Start difference. First operand 88 states and 198 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:36,573 INFO L93 Difference]: Finished difference Result 104 states and 219 transitions. [2021-10-05 22:44:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:36,575 INFO L225 Difference]: With dead ends: 104 [2021-10-05 22:44:36,575 INFO L226 Difference]: Without dead ends: 94 [2021-10-05 22:44:36,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-05 22:44:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-05 22:44:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-05 22:44:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.258426966292135) internal successors, (201), 89 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 201 transitions. [2021-10-05 22:44:36,577 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 201 transitions. Word has length 17 [2021-10-05 22:44:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:36,577 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 201 transitions. [2021-10-05 22:44:36,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 201 transitions. [2021-10-05 22:44:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:36,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:36,579 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:36,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:36,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-05 22:44:36,781 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1621254829, now seen corresponding path program 32 times [2021-10-05 22:44:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:36,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053685227] [2021-10-05 22:44:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:36,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:36,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:36,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053685227] [2021-10-05 22:44:36,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053685227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:36,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098944898] [2021-10-05 22:44:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:44:36,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:36,925 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:36,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-05 22:44:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098944898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:37,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:37,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 22:44:37,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371083818] [2021-10-05 22:44:37,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:44:37,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:44:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:44:37,961 INFO L87 Difference]: Start difference. First operand 90 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:38,471 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-10-05 22:44:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-05 22:44:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:38,473 INFO L225 Difference]: With dead ends: 206 [2021-10-05 22:44:38,473 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 22:44:38,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 22:44:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 22:44:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-05 22:44:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-05 22:44:38,479 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-05 22:44:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:38,479 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-05 22:44:38,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-05 22:44:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:38,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:38,481 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:38,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-05 22:44:38,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:38,696 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1529084699, now seen corresponding path program 33 times [2021-10-05 22:44:38,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:38,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064907783] [2021-10-05 22:44:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:38,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:38,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064907783] [2021-10-05 22:44:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064907783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:38,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977615852] [2021-10-05 22:44:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:38,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:38,845 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:38,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-05 22:44:39,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 22:44:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 22:44:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:40,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977615852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:40,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:40,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 22:44:40,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663990673] [2021-10-05 22:44:40,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 22:44:40,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 22:44:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:40,009 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:40,562 INFO L93 Difference]: Finished difference Result 180 states and 376 transitions. [2021-10-05 22:44:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 22:44:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:40,564 INFO L225 Difference]: With dead ends: 180 [2021-10-05 22:44:40,564 INFO L226 Difference]: Without dead ends: 162 [2021-10-05 22:44:40,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 22:44:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-05 22:44:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2021-10-05 22:44:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.355371900826446) internal successors, (285), 121 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 285 transitions. [2021-10-05 22:44:40,569 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 285 transitions. Word has length 17 [2021-10-05 22:44:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 285 transitions. [2021-10-05 22:44:40,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 285 transitions. [2021-10-05 22:44:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:40,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:40,571 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:40,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:40,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-05 22:44:40,781 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:40,782 INFO L82 PathProgramCache]: Analyzing trace with hash -188664361, now seen corresponding path program 34 times [2021-10-05 22:44:40,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:40,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001265183] [2021-10-05 22:44:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:40,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:40,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:40,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001265183] [2021-10-05 22:44:40,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001265183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:40,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970654793] [2021-10-05 22:44:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:40,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:40,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:40,932 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:40,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-05 22:44:41,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 22:44:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:42,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970654793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:42,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:42,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 22:44:42,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747266353] [2021-10-05 22:44:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 22:44:42,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 22:44:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:42,092 INFO L87 Difference]: Start difference. First operand 122 states and 285 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:42,728 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-10-05 22:44:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 22:44:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:42,730 INFO L225 Difference]: With dead ends: 168 [2021-10-05 22:44:42,730 INFO L226 Difference]: Without dead ends: 158 [2021-10-05 22:44:42,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 22:44:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-05 22:44:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-10-05 22:44:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-05 22:44:42,733 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-05 22:44:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:42,734 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-05 22:44:42,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-05 22:44:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:42,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:42,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:42,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-05 22:44:42,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:42,936 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1784659353, now seen corresponding path program 35 times [2021-10-05 22:44:42,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:42,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308283012] [2021-10-05 22:44:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:42,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:43,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:43,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308283012] [2021-10-05 22:44:43,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308283012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:43,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102029098] [2021-10-05 22:44:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:43,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:43,071 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:43,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-05 22:44:43,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:43,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102029098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:44,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:44,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:44,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197609768] [2021-10-05 22:44:44,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:44,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:44,152 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:44,463 INFO L93 Difference]: Finished difference Result 134 states and 288 transitions. [2021-10-05 22:44:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:44,465 INFO L225 Difference]: With dead ends: 134 [2021-10-05 22:44:44,465 INFO L226 Difference]: Without dead ends: 100 [2021-10-05 22:44:44,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-10-05 22:44:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-05 22:44:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-05 22:44:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.323232323232323) internal successors, (230), 99 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 230 transitions. [2021-10-05 22:44:44,469 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 230 transitions. Word has length 17 [2021-10-05 22:44:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:44,469 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 230 transitions. [2021-10-05 22:44:44,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 230 transitions. [2021-10-05 22:44:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:44,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:44,470 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:44,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-05 22:44:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-05 22:44:44,685 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash -346966087, now seen corresponding path program 36 times [2021-10-05 22:44:44,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:44,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517049838] [2021-10-05 22:44:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:44,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:44,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:44,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517049838] [2021-10-05 22:44:44,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517049838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:44,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800913205] [2021-10-05 22:44:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:44,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:44,835 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:44,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-05 22:44:45,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:44:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800913205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:45,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:45,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:45,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123680801] [2021-10-05 22:44:45,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:45,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:45,925 INFO L87 Difference]: Start difference. First operand 100 states and 230 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:46,255 INFO L93 Difference]: Finished difference Result 158 states and 338 transitions. [2021-10-05 22:44:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:46,257 INFO L225 Difference]: With dead ends: 158 [2021-10-05 22:44:46,257 INFO L226 Difference]: Without dead ends: 132 [2021-10-05 22:44:46,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-10-05 22:44:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-05 22:44:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-10-05 22:44:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3714285714285714) internal successors, (249), 105 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2021-10-05 22:44:46,261 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 17 [2021-10-05 22:44:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2021-10-05 22:44:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2021-10-05 22:44:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:46,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:46,263 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:46,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:46,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:46,477 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash -439136217, now seen corresponding path program 37 times [2021-10-05 22:44:46,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:46,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021352104] [2021-10-05 22:44:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:46,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:46,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:46,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021352104] [2021-10-05 22:44:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021352104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:46,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454085837] [2021-10-05 22:44:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:46,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:46,613 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-05 22:44:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454085837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:47,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:47,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618760892] [2021-10-05 22:44:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:47,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:47,778 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:48,182 INFO L93 Difference]: Finished difference Result 142 states and 298 transitions. [2021-10-05 22:44:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:44:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:48,184 INFO L225 Difference]: With dead ends: 142 [2021-10-05 22:44:48,184 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 22:44:48,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-10-05 22:44:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 22:44:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2021-10-05 22:44:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3551401869158877) internal successors, (252), 107 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 252 transitions. [2021-10-05 22:44:48,188 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 252 transitions. Word has length 17 [2021-10-05 22:44:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:48,189 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 252 transitions. [2021-10-05 22:44:48,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 252 transitions. [2021-10-05 22:44:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:48,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:48,190 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:48,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:48,394 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2138082019, now seen corresponding path program 38 times [2021-10-05 22:44:48,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:48,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418045081] [2021-10-05 22:44:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:48,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:48,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:48,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418045081] [2021-10-05 22:44:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418045081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:48,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432979563] [2021-10-05 22:44:48,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:44:48,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:48,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:48,538 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:48,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-05 22:44:49,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:44:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:49,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432979563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:49,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:49,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:49,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392738395] [2021-10-05 22:44:49,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:49,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:49,705 INFO L87 Difference]: Start difference. First operand 108 states and 252 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:50,093 INFO L93 Difference]: Finished difference Result 122 states and 270 transitions. [2021-10-05 22:44:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 22:44:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:50,095 INFO L225 Difference]: With dead ends: 122 [2021-10-05 22:44:50,095 INFO L226 Difference]: Without dead ends: 112 [2021-10-05 22:44:50,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-10-05 22:44:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-05 22:44:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2021-10-05 22:44:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3551401869158877) internal successors, (252), 107 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 252 transitions. [2021-10-05 22:44:50,099 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 252 transitions. Word has length 17 [2021-10-05 22:44:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:50,099 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 252 transitions. [2021-10-05 22:44:50,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 252 transitions. [2021-10-05 22:44:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:50,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:50,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:50,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-05 22:44:50,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:50,316 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 728745069, now seen corresponding path program 39 times [2021-10-05 22:44:50,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:50,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171026384] [2021-10-05 22:44:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:50,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:50,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:50,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171026384] [2021-10-05 22:44:50,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171026384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:50,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052058031] [2021-10-05 22:44:50,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:44:50,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:50,531 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:50,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-05 22:44:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:44:51,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:51,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052058031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:51,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:51,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:51,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122370492] [2021-10-05 22:44:51,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:51,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:51,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:51,608 INFO L87 Difference]: Start difference. First operand 108 states and 252 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:52,054 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-05 22:44:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:44:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:52,056 INFO L225 Difference]: With dead ends: 148 [2021-10-05 22:44:52,056 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:44:52,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-10-05 22:44:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:44:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-10-05 22:44:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.3473684210526318) internal successors, (223), 95 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 223 transitions. [2021-10-05 22:44:52,061 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 223 transitions. Word has length 17 [2021-10-05 22:44:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:52,061 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 223 transitions. [2021-10-05 22:44:52,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 223 transitions. [2021-10-05 22:44:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:52,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:52,062 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:52,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:52,277 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash 636574939, now seen corresponding path program 40 times [2021-10-05 22:44:52,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:52,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316762711] [2021-10-05 22:44:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:52,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:52,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:52,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316762711] [2021-10-05 22:44:52,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316762711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:52,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565896502] [2021-10-05 22:44:52,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:44:52,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:52,422 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:52,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-05 22:44:53,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:44:53,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 22:44:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:53,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565896502] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:53,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:53,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 22:44:53,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606564549] [2021-10-05 22:44:53,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 22:44:53,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 22:44:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:44:53,607 INFO L87 Difference]: Start difference. First operand 96 states and 223 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:54,059 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-10-05 22:44:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:54,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:54,061 INFO L225 Difference]: With dead ends: 132 [2021-10-05 22:44:54,061 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 22:44:54,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-10-05 22:44:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 22:44:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-10-05 22:44:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 219 transitions. [2021-10-05 22:44:54,065 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 219 transitions. Word has length 17 [2021-10-05 22:44:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 219 transitions. [2021-10-05 22:44:54,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 219 transitions. [2021-10-05 22:44:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:44:54,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:54,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:54,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:54,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-05 22:44:54,282 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1081174121, now seen corresponding path program 41 times [2021-10-05 22:44:54,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:54,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718072650] [2021-10-05 22:44:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:54,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:54,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:54,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718072650] [2021-10-05 22:44:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718072650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:54,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391174545] [2021-10-05 22:44:54,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:44:54,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:54,426 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:54,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-05 22:44:55,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 22:44:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 22:44:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:55,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391174545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:55,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:55,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 22:44:55,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501548107] [2021-10-05 22:44:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:44:55,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:44:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:44:55,590 INFO L87 Difference]: Start difference. First operand 96 states and 219 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:55,997 INFO L93 Difference]: Finished difference Result 120 states and 250 transitions. [2021-10-05 22:44:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:44:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:44:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:55,998 INFO L225 Difference]: With dead ends: 120 [2021-10-05 22:44:55,998 INFO L226 Difference]: Without dead ends: 110 [2021-10-05 22:44:55,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-10-05 22:44:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-05 22:44:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2021-10-05 22:44:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2318840579710146) internal successors, (154), 69 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 154 transitions. [2021-10-05 22:44:56,002 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 154 transitions. Word has length 17 [2021-10-05 22:44:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:56,002 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 154 transitions. [2021-10-05 22:44:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 154 transitions. [2021-10-05 22:44:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:44:56,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:56,004 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:56,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:56,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:56,219 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1814014008, now seen corresponding path program 42 times [2021-10-05 22:44:56,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:56,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739516806] [2021-10-05 22:44:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:56,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:56,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:56,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739516806] [2021-10-05 22:44:56,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739516806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:56,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842897504] [2021-10-05 22:44:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:44:56,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:56,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:56,366 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:56,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-05 22:44:57,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 22:44:57,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:44:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 22:44:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:57,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842897504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:57,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:57,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 22:44:57,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401048817] [2021-10-05 22:44:57,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 22:44:57,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:57,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 22:44:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:44:57,576 INFO L87 Difference]: Start difference. First operand 70 states and 154 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:44:58,037 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2021-10-05 22:44:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 22:44:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 22:44:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:44:58,039 INFO L225 Difference]: With dead ends: 142 [2021-10-05 22:44:58,039 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 22:44:58,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-10-05 22:44:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 22:44:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 80. [2021-10-05 22:44:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 79 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 182 transitions. [2021-10-05 22:44:58,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 182 transitions. Word has length 18 [2021-10-05 22:44:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:44:58,047 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 182 transitions. [2021-10-05 22:44:58,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:44:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 182 transitions. [2021-10-05 22:44:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:44:58,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:44:58,048 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:44:58,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-05 22:44:58,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-05 22:44:58,263 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:44:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:44:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 763204228, now seen corresponding path program 43 times [2021-10-05 22:44:58,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:44:58,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273117397] [2021-10-05 22:44:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:44:58,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:44:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:58,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:44:58,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273117397] [2021-10-05 22:44:58,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273117397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:58,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747825790] [2021-10-05 22:44:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:44:58,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:44:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:44:58,411 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:44:58,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-05 22:44:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:44:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 22:44:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:44:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:44:59,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747825790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:44:59,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:44:59,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 22:44:59,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648435986] [2021-10-05 22:44:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 22:44:59,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:44:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 22:44:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:44:59,612 INFO L87 Difference]: Start difference. First operand 80 states and 182 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:45:00,125 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-10-05 22:45:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 22:45:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 22:45:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:45:00,127 INFO L225 Difference]: With dead ends: 138 [2021-10-05 22:45:00,127 INFO L226 Difference]: Without dead ends: 128 [2021-10-05 22:45:00,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 22:45:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-05 22:45:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2021-10-05 22:45:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 136 transitions. [2021-10-05 22:45:00,130 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 136 transitions. Word has length 18 [2021-10-05 22:45:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:45:00,130 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 136 transitions. [2021-10-05 22:45:00,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 136 transitions. [2021-10-05 22:45:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:45:00,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:45:00,131 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:45:00,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-10-05 22:45:00,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-05 22:45:00,332 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:45:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:45:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash -18366322, now seen corresponding path program 44 times [2021-10-05 22:45:00,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:45:00,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945185997] [2021-10-05 22:45:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:45:00,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:45:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:45:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:45:00,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:45:00,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945185997] [2021-10-05 22:45:00,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945185997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:45:00,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882499519] [2021-10-05 22:45:00,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:45:00,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:45:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:45:00,451 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:45:00,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-05 22:45:01,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:45:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:45:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 22:45:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:45:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:45:01,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882499519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:45:01,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:45:01,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 22:45:01,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967481234] [2021-10-05 22:45:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 22:45:01,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:45:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 22:45:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-05 22:45:01,662 INFO L87 Difference]: Start difference. First operand 64 states and 136 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:45:02,094 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2021-10-05 22:45:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 22:45:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 22:45:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:45:02,095 INFO L225 Difference]: With dead ends: 94 [2021-10-05 22:45:02,095 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 22:45:02,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-05 22:45:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 22:45:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 22:45:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-10-05 22:45:02,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 18 [2021-10-05 22:45:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:45:02,098 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-10-05 22:45:02,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-10-05 22:45:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:45:02,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:45:02,099 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:45:02,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-10-05 22:45:02,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-05 22:45:02,314 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:45:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:45:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1153797350, now seen corresponding path program 45 times [2021-10-05 22:45:02,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:45:02,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635111680] [2021-10-05 22:45:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:45:02,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:45:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:45:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:45:02,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:45:02,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635111680] [2021-10-05 22:45:02,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635111680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:45:02,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489432982] [2021-10-05 22:45:02,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:45:02,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:45:02,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:45:02,450 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:45:02,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-05 22:45:03,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 22:45:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:45:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 22:45:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:45:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:45:03,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489432982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:45:03,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:45:03,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-10-05 22:45:03,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579170529] [2021-10-05 22:45:03,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 22:45:03,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:45:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 22:45:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:45:03,664 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:45:03,982 INFO L93 Difference]: Finished difference Result 48 states and 87 transitions. [2021-10-05 22:45:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:45:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 22:45:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:45:03,983 INFO L225 Difference]: With dead ends: 48 [2021-10-05 22:45:03,983 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 22:45:03,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-10-05 22:45:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 22:45:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 22:45:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 22:45:03,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-05 22:45:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:45:03,984 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 22:45:03,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:45:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 22:45:03,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 22:45:03,987 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 22:45:03,987 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 22:45:03,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 22:45:04,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-05 22:45:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:45:04,202 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 22:45:04,202 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 22:45:04,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:45:04 BasicIcfg [2021-10-05 22:45:04,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 22:45:04,205 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 22:45:04,205 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 22:45:04,205 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 22:45:04,206 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:43:27" (3/4) ... [2021-10-05 22:45:04,209 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 22:45:04,214 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 22:45:04,214 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 22:45:04,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 22:45:04,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 22:45:04,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 22:45:04,219 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 22:45:04,254 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 22:45:04,254 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 22:45:04,256 INFO L168 Benchmark]: Toolchain (without parser) took 98276.31 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 30.8 MB in the beginning and 243.5 MB in the end (delta: -212.7 MB). Peak memory consumption was 171.7 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,257 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 22:45:04,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.64 ms. Allocated memory is still 54.5 MB. Free memory was 30.5 MB in the beginning and 33.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.87 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 32.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,258 INFO L168 Benchmark]: Boogie Preprocessor took 61.02 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 30.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,258 INFO L168 Benchmark]: RCFGBuilder took 572.81 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 33.2 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,259 INFO L168 Benchmark]: TraceAbstraction took 97116.94 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 32.8 MB in the beginning and 246.6 MB in the end (delta: -213.8 MB). Peak memory consumption was 168.7 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,259 INFO L168 Benchmark]: Witness Printer took 49.59 ms. Allocated memory is still 436.2 MB. Free memory was 245.6 MB in the beginning and 243.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:45:04,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 401.64 ms. Allocated memory is still 54.5 MB. Free memory was 30.5 MB in the beginning and 33.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.87 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 32.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.02 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 30.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 572.81 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 33.2 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 97116.94 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 32.8 MB in the beginning and 246.6 MB in the end (delta: -213.8 MB). Peak memory consumption was 168.7 MB. Max. memory is 16.1 GB. * Witness Printer took 49.59 ms. Allocated memory is still 436.2 MB. Free memory was 245.6 MB in the beginning and 243.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3201.4ms, 77 PlacesBefore, 23 PlacesAfterwards, 76 TransitionsBefore, 18 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 67 TotalNumberOfCompositions, 452 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 439, positive: 437, positive conditional: 0, positive unconditional: 437, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 282, positive: 280, positive conditional: 0, positive unconditional: 280, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 282, positive: 279, positive conditional: 0, positive unconditional: 279, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 439, positive: 157, positive conditional: 0, positive unconditional: 157, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 282, unknown conditional: 0, unknown unconditional: 282] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 96919.6ms, OverallIterations: 70, TraceHistogramMax: 3, EmptinessCheckTime: 62.1ms, AutomataDifference: 20252.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3273.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2099 SDtfs, 4985 SDslu, 11027 SDs, 0 SdLazy, 11551 SolverSat, 646 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6782.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1986 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 1430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 20694.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=58, InterpolantAutomatonStates: 976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 348.9ms AutomataMinimizationTime, 70 MinimizatonAttempts, 2032 StatesRemovedByMinimization, 64 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 441.3ms SsaConstructionTime, 2118.7ms SatisfiabilityAnalysisTime, 24952.4ms InterpolantComputationTime, 2082 NumberOfCodeBlocks, 2082 NumberOfCodeBlocksAsserted, 194 NumberOfCheckSat, 1949 ConstructedInterpolants, 0 QuantifiedInterpolants, 21918 SizeOfPredicates, 180 NumberOfNonLiveVariables, 6681 ConjunctsInSsa, 1612 ConjunctsInUnsatCore, 133 InterpolantComputations, 7 PerfectInterpolantSequences, 1/497 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 22:45:04,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...