./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c --full-output --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/simple-array-sum.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 407f95dd717ecc0cd05484e023f3a40d2bffaefb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:19:46,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:19:46,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:19:46,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:19:46,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:19:46,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:19:46,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:19:46,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:19:46,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:19:46,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:19:46,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:19:46,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:19:46,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:19:46,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:19:46,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:19:46,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:19:46,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:19:46,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:19:46,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:19:46,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:19:46,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:19:46,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:19:46,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:19:46,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:19:46,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:19:46,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:19:46,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:19:46,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:19:46,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:19:46,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:19:46,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:19:46,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:19:46,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:19:46,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:19:46,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:19:46,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:19:46,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:19:46,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:19:46,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:19:46,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:19:46,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:19:46,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:19:46,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:19:46,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:19:46,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:19:46,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:19:46,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:19:46,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:19:46,437 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:19:46,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:19:46,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:19:46,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:19:46,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:19:46,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:19:46,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:19:46,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:19:46,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:19:46,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:19:46,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:19:46,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:19:46,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:19:46,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:19:46,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:19:46,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:19:46,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:19:46,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:19:46,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:19:46,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:19:46,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:19:46,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:19:46,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:19:46,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:19:46,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 407f95dd717ecc0cd05484e023f3a40d2bffaefb [2021-10-03 12:19:46,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:19:46,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:19:46,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:19:46,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:19:46,969 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:19:46,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-03 12:19:47,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c26393e7/d2d684ca89e24dc6ba216112d1915cfb/FLAG74147201a [2021-10-03 12:19:47,624 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:19:47,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-03 12:19:47,625 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:19:47,625 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:19:47,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c26393e7/d2d684ca89e24dc6ba216112d1915cfb/FLAG74147201a [2021-10-03 12:19:47,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c26393e7/d2d684ca89e24dc6ba216112d1915cfb [2021-10-03 12:19:48,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:19:48,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:19:48,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:19:48,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:19:48,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:19:48,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52fac6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48, skipping insertion in model container [2021-10-03 12:19:48,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:19:48,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:19:48,208 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:19:48,309 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/simple-array-sum.wvr.c[1134,1147] [2021-10-03 12:19:48,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:19:48,362 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:19:48,378 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:19:48,418 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/simple-array-sum.wvr.c[1134,1147] [2021-10-03 12:19:48,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:19:48,471 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:19:48,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48 WrapperNode [2021-10-03 12:19:48,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:19:48,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:19:48,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:19:48,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:19:48,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:19:48,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:19:48,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:19:48,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:19:48,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:19:48,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:19:48,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:19:48,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:19:48,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (1/1) ... [2021-10-03 12:19:48,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:19:48,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:48,676 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) [2021-10-03 12:19:48,700 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 [2021-10-03 12:19:48,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:19:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:19:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:19:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:19:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-03 12:19:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-03 12:19:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:19:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:19:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-03 12:19:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:19:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:19:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:19:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:19:48,758 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:19:49,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:19:49,270 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-03 12:19:49,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:19:49 BoogieIcfgContainer [2021-10-03 12:19:49,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:19:49,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:19:49,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:19:49,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:19:49,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:19:48" (1/3) ... [2021-10-03 12:19:49,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247b9987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:19:49, skipping insertion in model container [2021-10-03 12:19:49,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:19:48" (2/3) ... [2021-10-03 12:19:49,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247b9987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:19:49, skipping insertion in model container [2021-10-03 12:19:49,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:19:49" (3/3) ... [2021-10-03 12:19:49,288 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.c [2021-10-03 12:19:49,294 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:19:49,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:19:49,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:19:49,295 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:19:49,368 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,368 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,369 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,376 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,376 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,376 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,377 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,377 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,377 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,377 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,377 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,378 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,378 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,379 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,379 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,379 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,379 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,379 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,380 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,380 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,380 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,380 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,381 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,381 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,381 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,382 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,382 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,382 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,382 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,383 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,383 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,383 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,383 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,383 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,384 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,384 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,385 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,385 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,385 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,385 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,385 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,386 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,386 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,386 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,386 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,387 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,387 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,387 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,387 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,389 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,389 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,389 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,389 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,390 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,390 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,390 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,392 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,392 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,392 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,392 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,392 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,393 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,393 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,393 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,393 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,393 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,394 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,397 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,398 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,398 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,398 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,398 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,403 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,404 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,410 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,410 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,410 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,410 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:19:49,427 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-03 12:19:49,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:19:49,528 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 [2021-10-03 12:19:49,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-03 12:19:49,554 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:19:49,567 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 151 transitions, 326 flow [2021-10-03 12:19:49,571 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 151 transitions, 326 flow [2021-10-03 12:19:49,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 151 transitions, 326 flow [2021-10-03 12:19:49,661 INFO L129 PetriNetUnfolder]: 14/148 cut-off events. [2021-10-03 12:19:49,661 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-03 12:19:49,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 148 events. 14/148 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 121 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 112. Up to 3 conditions per place. [2021-10-03 12:19:49,671 INFO L116 LiptonReduction]: Number of co-enabled transitions 1714 [2021-10-03 12:19:54,159 INFO L131 LiptonReduction]: Checked pairs total: 2513 [2021-10-03 12:19:54,159 INFO L133 LiptonReduction]: Total number of compositions: 132 [2021-10-03 12:19:54,169 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 34 transitions, 92 flow [2021-10-03 12:19:54,200 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:19:54,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:54,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:54,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -134499675, now seen corresponding path program 1 times [2021-10-03 12:19:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:54,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313049563] [2021-10-03 12:19:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:54,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:54,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:54,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313049563] [2021-10-03 12:19:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313049563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:19:54,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:19:54,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:19:54,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379450554] [2021-10-03 12:19:54,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:19:54,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:19:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:19:54,890 INFO L87 Difference]: Start difference. First operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:54,982 INFO L93 Difference]: Finished difference Result 418 states and 1414 transitions. [2021-10-03 12:19:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:19:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-03 12:19:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:55,007 INFO L225 Difference]: With dead ends: 418 [2021-10-03 12:19:55,007 INFO L226 Difference]: Without dead ends: 395 [2021-10-03 12:19:55,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:19:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-10-03 12:19:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 353. [2021-10-03 12:19:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.4232954545454546) internal successors, (1205), 352 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1205 transitions. [2021-10-03 12:19:55,119 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1205 transitions. Word has length 21 [2021-10-03 12:19:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:55,121 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1205 transitions. [2021-10-03 12:19:55,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1205 transitions. [2021-10-03 12:19:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 12:19:55,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:55,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:19:55,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash 550906475, now seen corresponding path program 1 times [2021-10-03 12:19:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:55,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407555977] [2021-10-03 12:19:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:55,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:55,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:55,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407555977] [2021-10-03 12:19:55,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407555977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:19:55,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:19:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:19:55,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109799313] [2021-10-03 12:19:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:19:55,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:19:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:19:55,276 INFO L87 Difference]: Start difference. First operand 353 states and 1205 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:55,379 INFO L93 Difference]: Finished difference Result 831 states and 2700 transitions. [2021-10-03 12:19:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:19:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-03 12:19:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:55,390 INFO L225 Difference]: With dead ends: 831 [2021-10-03 12:19:55,391 INFO L226 Difference]: Without dead ends: 791 [2021-10-03 12:19:55,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:19:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-10-03 12:19:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 439. [2021-10-03 12:19:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.365296803652968) internal successors, (1474), 438 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1474 transitions. [2021-10-03 12:19:55,441 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1474 transitions. Word has length 22 [2021-10-03 12:19:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:55,442 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1474 transitions. [2021-10-03 12:19:55,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1474 transitions. [2021-10-03 12:19:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 12:19:55,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:55,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:55,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:19:55,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2094545201, now seen corresponding path program 1 times [2021-10-03 12:19:55,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:55,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24363514] [2021-10-03 12:19:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:55,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:55,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:55,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24363514] [2021-10-03 12:19:55,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24363514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:55,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192464069] [2021-10-03 12:19:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:55,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:55,588 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) [2021-10-03 12:19:55,615 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 [2021-10-03 12:19:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:19:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:55,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192464069] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:55,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:55,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-03 12:19:55,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584685771] [2021-10-03 12:19:55,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:19:55,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:19:55,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:19:55,851 INFO L87 Difference]: Start difference. First operand 439 states and 1474 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-10-03 12:19:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:55,956 INFO L93 Difference]: Finished difference Result 644 states and 2158 transitions. [2021-10-03 12:19:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:19:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 22 [2021-10-03 12:19:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:55,964 INFO L225 Difference]: With dead ends: 644 [2021-10-03 12:19:55,965 INFO L226 Difference]: Without dead ends: 644 [2021-10-03 12:19:55,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:19:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-10-03 12:19:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 394. [2021-10-03 12:19:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.3944020356234095) internal successors, (1334), 393 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1334 transitions. [2021-10-03 12:19:55,995 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1334 transitions. Word has length 22 [2021-10-03 12:19:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:55,995 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1334 transitions. [2021-10-03 12:19:55,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-10-03 12:19:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1334 transitions. [2021-10-03 12:19:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:19:55,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:55,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:56,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-03 12:19:56,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:56,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1386832260, now seen corresponding path program 1 times [2021-10-03 12:19:56,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:56,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099736351] [2021-10-03 12:19:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:56,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:56,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:56,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099736351] [2021-10-03 12:19:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099736351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:19:56,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:19:56,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:19:56,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957998322] [2021-10-03 12:19:56,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:19:56,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:19:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:19:56,282 INFO L87 Difference]: Start difference. First operand 394 states and 1334 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:56,308 INFO L93 Difference]: Finished difference Result 594 states and 1927 transitions. [2021-10-03 12:19:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:19:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-10-03 12:19:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:56,314 INFO L225 Difference]: With dead ends: 594 [2021-10-03 12:19:56,315 INFO L226 Difference]: Without dead ends: 568 [2021-10-03 12:19:56,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:19:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-10-03 12:19:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 532. [2021-10-03 12:19:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.3389830508474576) internal successors, (1773), 531 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1773 transitions. [2021-10-03 12:19:56,359 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1773 transitions. Word has length 23 [2021-10-03 12:19:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:56,359 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1773 transitions. [2021-10-03 12:19:56,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1773 transitions. [2021-10-03 12:19:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:19:56,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:56,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:56,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 12:19:56,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 607121442, now seen corresponding path program 1 times [2021-10-03 12:19:56,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:56,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035683996] [2021-10-03 12:19:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:56,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:19:56,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:56,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035683996] [2021-10-03 12:19:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035683996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:56,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909203051] [2021-10-03 12:19:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:56,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:56,428 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) [2021-10-03 12:19:56,445 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 [2021-10-03 12:19:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:19:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:19:56,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909203051] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:56,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:56,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-03 12:19:56,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447586619] [2021-10-03 12:19:56,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:19:56,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:19:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:19:56,638 INFO L87 Difference]: Start difference. First operand 532 states and 1773 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-10-03 12:19:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:56,777 INFO L93 Difference]: Finished difference Result 822 states and 2671 transitions. [2021-10-03 12:19:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:19:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-10-03 12:19:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:56,786 INFO L225 Difference]: With dead ends: 822 [2021-10-03 12:19:56,787 INFO L226 Difference]: Without dead ends: 822 [2021-10-03 12:19:56,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:19:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-10-03 12:19:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 514. [2021-10-03 12:19:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.317738791423002) internal successors, (1702), 513 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1702 transitions. [2021-10-03 12:19:56,826 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1702 transitions. Word has length 23 [2021-10-03 12:19:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:56,826 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1702 transitions. [2021-10-03 12:19:56,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-10-03 12:19:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1702 transitions. [2021-10-03 12:19:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:19:56,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:56,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:56,865 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 [2021-10-03 12:19:57,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:57,043 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1459051159, now seen corresponding path program 1 times [2021-10-03 12:19:57,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:57,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707585648] [2021-10-03 12:19:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:57,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:19:57,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:57,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707585648] [2021-10-03 12:19:57,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707585648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:57,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735273679] [2021-10-03 12:19:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:57,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:57,104 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) [2021-10-03 12:19:57,127 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 [2021-10-03 12:19:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:19:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:19:57,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735273679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:19:57,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 12:19:57,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-03 12:19:57,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373786326] [2021-10-03 12:19:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:19:57,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:19:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:19:57,287 INFO L87 Difference]: Start difference. First operand 514 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-10-03 12:19:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:57,352 INFO L93 Difference]: Finished difference Result 382 states and 1181 transitions. [2021-10-03 12:19:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:19:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 26 [2021-10-03 12:19:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:57,355 INFO L225 Difference]: With dead ends: 382 [2021-10-03 12:19:57,356 INFO L226 Difference]: Without dead ends: 278 [2021-10-03 12:19:57,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:19:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-03 12:19:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-03 12:19:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.371841155234657) internal successors, (934), 277 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 934 transitions. [2021-10-03 12:19:57,370 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 934 transitions. Word has length 26 [2021-10-03 12:19:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 934 transitions. [2021-10-03 12:19:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-10-03 12:19:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 934 transitions. [2021-10-03 12:19:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:19:57,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:57,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:57,409 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 [2021-10-03 12:19:57,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:57,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1605109301, now seen corresponding path program 1 times [2021-10-03 12:19:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:57,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948815117] [2021-10-03 12:19:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:57,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:19:57,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:57,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948815117] [2021-10-03 12:19:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948815117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:57,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483838861] [2021-10-03 12:19:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:57,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:57,657 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) [2021-10-03 12:19:57,671 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 [2021-10-03 12:19:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:57,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:19:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:19:57,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483838861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:57,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:57,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-03 12:19:57,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149731401] [2021-10-03 12:19:57,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:19:57,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:19:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:19:57,876 INFO L87 Difference]: Start difference. First operand 278 states and 934 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-10-03 12:19:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:57,972 INFO L93 Difference]: Finished difference Result 348 states and 1180 transitions. [2021-10-03 12:19:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:19:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 26 [2021-10-03 12:19:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:57,977 INFO L225 Difference]: With dead ends: 348 [2021-10-03 12:19:57,977 INFO L226 Difference]: Without dead ends: 348 [2021-10-03 12:19:57,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:19:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-10-03 12:19:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-10-03 12:19:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.400576368876081) internal successors, (1180), 347 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1180 transitions. [2021-10-03 12:19:57,994 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1180 transitions. Word has length 26 [2021-10-03 12:19:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:57,997 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1180 transitions. [2021-10-03 12:19:57,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-10-03 12:19:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1180 transitions. [2021-10-03 12:19:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 12:19:58,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:58,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:58,039 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 [2021-10-03 12:19:58,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:58,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash 436037149, now seen corresponding path program 1 times [2021-10-03 12:19:58,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:58,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051935447] [2021-10-03 12:19:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:58,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:19:58,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:58,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051935447] [2021-10-03 12:19:58,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051935447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:58,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125572571] [2021-10-03 12:19:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:58,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:58,280 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) [2021-10-03 12:19:58,291 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 [2021-10-03 12:19:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:19:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:19:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125572571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:58,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-03 12:19:58,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749070848] [2021-10-03 12:19:58,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 12:19:58,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 12:19:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 12:19:58,543 INFO L87 Difference]: Start difference. First operand 348 states and 1180 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-10-03 12:19:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:58,633 INFO L93 Difference]: Finished difference Result 412 states and 1414 transitions. [2021-10-03 12:19:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:19:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 27 [2021-10-03 12:19:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:58,645 INFO L225 Difference]: With dead ends: 412 [2021-10-03 12:19:58,646 INFO L226 Difference]: Without dead ends: 412 [2021-10-03 12:19:58,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:19:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-03 12:19:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 370. [2021-10-03 12:19:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.4525745257452574) internal successors, (1274), 369 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1274 transitions. [2021-10-03 12:19:58,679 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1274 transitions. Word has length 27 [2021-10-03 12:19:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1274 transitions. [2021-10-03 12:19:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-10-03 12:19:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1274 transitions. [2021-10-03 12:19:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 12:19:58,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:58,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:58,733 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 [2021-10-03 12:19:58,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:58,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1438209012, now seen corresponding path program 1 times [2021-10-03 12:19:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:58,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760881796] [2021-10-03 12:19:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:58,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:19:58,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:58,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760881796] [2021-10-03 12:19:58,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760881796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:58,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382141343] [2021-10-03 12:19:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:58,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:58,988 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) [2021-10-03 12:19:59,005 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 [2021-10-03 12:19:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 12:19:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:19:59,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382141343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:59,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:59,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-03 12:19:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064862943] [2021-10-03 12:19:59,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 12:19:59,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 12:19:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:19:59,186 INFO L87 Difference]: Start difference. First operand 370 states and 1274 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:19:59,250 INFO L93 Difference]: Finished difference Result 486 states and 1650 transitions. [2021-10-03 12:19:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:19:59,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 29 [2021-10-03 12:19:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:19:59,255 INFO L225 Difference]: With dead ends: 486 [2021-10-03 12:19:59,256 INFO L226 Difference]: Without dead ends: 454 [2021-10-03 12:19:59,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:19:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-10-03 12:19:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-10-03 12:19:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.4216335540838854) internal successors, (1550), 453 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1550 transitions. [2021-10-03 12:19:59,276 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1550 transitions. Word has length 29 [2021-10-03 12:19:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:19:59,277 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1550 transitions. [2021-10-03 12:19:59,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:19:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1550 transitions. [2021-10-03 12:19:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-03 12:19:59,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:19:59,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:19:59,318 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 [2021-10-03 12:19:59,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:59,494 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:19:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:19:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1098508591, now seen corresponding path program 2 times [2021-10-03 12:19:59,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:19:59,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838834846] [2021-10-03 12:19:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:19:59,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:19:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:19:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:19:59,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:19:59,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838834846] [2021-10-03 12:19:59,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838834846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:59,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916770304] [2021-10-03 12:19:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:19:59,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:19:59,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:19:59,566 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) [2021-10-03 12:19:59,579 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 [2021-10-03 12:19:59,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:19:59,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:19:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:19:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:19:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:19:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916770304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:19:59,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:19:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-03 12:19:59,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73803899] [2021-10-03 12:19:59,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-03 12:19:59,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:19:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-03 12:19:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-03 12:19:59,858 INFO L87 Difference]: Start difference. First operand 454 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:00,089 INFO L93 Difference]: Finished difference Result 757 states and 2457 transitions. [2021-10-03 12:20:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 12:20:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 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 32 [2021-10-03 12:20:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:00,094 INFO L225 Difference]: With dead ends: 757 [2021-10-03 12:20:00,094 INFO L226 Difference]: Without dead ends: 456 [2021-10-03 12:20:00,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:20:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-10-03 12:20:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2021-10-03 12:20:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.410989010989011) internal successors, (1552), 455 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1552 transitions. [2021-10-03 12:20:00,115 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1552 transitions. Word has length 32 [2021-10-03 12:20:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1552 transitions. [2021-10-03 12:20:00,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1552 transitions. [2021-10-03 12:20:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 12:20:00,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:00,118 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:00,160 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 [2021-10-03 12:20:00,331 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,SelfDestructingSolverStorable9 [2021-10-03 12:20:00,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106894, now seen corresponding path program 3 times [2021-10-03 12:20:00,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:00,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629415134] [2021-10-03 12:20:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:00,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:20:00,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:00,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629415134] [2021-10-03 12:20:00,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629415134] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:00,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549891829] [2021-10-03 12:20:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:20:00,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:00,412 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) [2021-10-03 12:20:00,432 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 [2021-10-03 12:20:00,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:20:00,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:20:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-03 12:20:00,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549891829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:00,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-03 12:20:00,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759418070] [2021-10-03 12:20:00,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-03 12:20:00,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-03 12:20:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-03 12:20:00,705 INFO L87 Difference]: Start difference. First operand 456 states and 1552 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:00,967 INFO L93 Difference]: Finished difference Result 698 states and 2430 transitions. [2021-10-03 12:20:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:20:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 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 34 [2021-10-03 12:20:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:00,974 INFO L225 Difference]: With dead ends: 698 [2021-10-03 12:20:00,975 INFO L226 Difference]: Without dead ends: 698 [2021-10-03 12:20:00,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:20:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-10-03 12:20:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 648. [2021-10-03 12:20:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.4961360123647602) internal successors, (2262), 647 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2262 transitions. [2021-10-03 12:20:01,004 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2262 transitions. Word has length 34 [2021-10-03 12:20:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:01,004 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2262 transitions. [2021-10-03 12:20:01,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2262 transitions. [2021-10-03 12:20:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-03 12:20:01,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:01,008 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:01,046 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 [2021-10-03 12:20:01,222 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,SelfDestructingSolverStorable10 [2021-10-03 12:20:01,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2112452557, now seen corresponding path program 4 times [2021-10-03 12:20:01,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:01,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210008990] [2021-10-03 12:20:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:01,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-03 12:20:01,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:01,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210008990] [2021-10-03 12:20:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210008990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:01,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817534338] [2021-10-03 12:20:01,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:20:01,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:01,295 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) [2021-10-03 12:20:01,319 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 [2021-10-03 12:20:01,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:20:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:20:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-03 12:20:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817534338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:01,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-03 12:20:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675656937] [2021-10-03 12:20:01,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-03 12:20:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-03 12:20:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:20:01,549 INFO L87 Difference]: Start difference. First operand 648 states and 2262 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:01,729 INFO L93 Difference]: Finished difference Result 1224 states and 4233 transitions. [2021-10-03 12:20:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:20:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 37 [2021-10-03 12:20:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:01,741 INFO L225 Difference]: With dead ends: 1224 [2021-10-03 12:20:01,741 INFO L226 Difference]: Without dead ends: 1116 [2021-10-03 12:20:01,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:20:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-03 12:20:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 908. [2021-10-03 12:20:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.520396912899669) internal successors, (3193), 907 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3193 transitions. [2021-10-03 12:20:01,783 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3193 transitions. Word has length 37 [2021-10-03 12:20:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 3193 transitions. [2021-10-03 12:20:01,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3193 transitions. [2021-10-03 12:20:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-03 12:20:01,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:01,788 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:01,824 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 [2021-10-03 12:20:02,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:02,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash -259426688, now seen corresponding path program 5 times [2021-10-03 12:20:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:02,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326763689] [2021-10-03 12:20:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:02,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-03 12:20:02,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326763689] [2021-10-03 12:20:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326763689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:02,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692696891] [2021-10-03 12:20:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:20:02,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:02,099 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) [2021-10-03 12:20:02,130 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 [2021-10-03 12:20:02,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-03 12:20:02,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:20:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-03 12:20:02,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692696891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:02,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:02,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-03 12:20:02,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607266726] [2021-10-03 12:20:02,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:20:02,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:20:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:20:02,489 INFO L87 Difference]: Start difference. First operand 908 states and 3193 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:02,926 INFO L93 Difference]: Finished difference Result 1726 states and 5997 transitions. [2021-10-03 12:20:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:20:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 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 40 [2021-10-03 12:20:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:02,940 INFO L225 Difference]: With dead ends: 1726 [2021-10-03 12:20:02,940 INFO L226 Difference]: Without dead ends: 1390 [2021-10-03 12:20:02,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:20:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-10-03 12:20:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1094. [2021-10-03 12:20:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.5480329368709973) internal successors, (3878), 1093 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3878 transitions. [2021-10-03 12:20:02,995 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3878 transitions. Word has length 40 [2021-10-03 12:20:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 3878 transitions. [2021-10-03 12:20:02,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3878 transitions. [2021-10-03 12:20:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-03 12:20:03,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:03,002 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:03,040 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 [2021-10-03 12:20:03,216 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,SelfDestructingSolverStorable12 [2021-10-03 12:20:03,217 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1860337029, now seen corresponding path program 6 times [2021-10-03 12:20:03,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:03,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718462919] [2021-10-03 12:20:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:03,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 12:20:03,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:03,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718462919] [2021-10-03 12:20:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718462919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:03,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325836807] [2021-10-03 12:20:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:20:03,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:03,314 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) [2021-10-03 12:20:03,342 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 [2021-10-03 12:20:03,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-03 12:20:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:03,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-03 12:20:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-03 12:20:03,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325836807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:03,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:03,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-03 12:20:03,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48473473] [2021-10-03 12:20:03,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:20:03,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:20:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:20:03,870 INFO L87 Difference]: Start difference. First operand 1094 states and 3878 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:04,328 INFO L93 Difference]: Finished difference Result 1766 states and 6344 transitions. [2021-10-03 12:20:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:20:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 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 42 [2021-10-03 12:20:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:04,350 INFO L225 Difference]: With dead ends: 1766 [2021-10-03 12:20:04,350 INFO L226 Difference]: Without dead ends: 1750 [2021-10-03 12:20:04,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:20:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-03 12:20:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1220. [2021-10-03 12:20:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.545529122231337) internal successors, (4322), 1219 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 4322 transitions. [2021-10-03 12:20:04,431 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 4322 transitions. Word has length 42 [2021-10-03 12:20:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 4322 transitions. [2021-10-03 12:20:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 4322 transitions. [2021-10-03 12:20:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-03 12:20:04,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:04,438 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:04,481 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 [2021-10-03 12:20:04,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:04,652 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1673534370, now seen corresponding path program 7 times [2021-10-03 12:20:04,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:04,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716950932] [2021-10-03 12:20:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:04,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-03 12:20:04,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:04,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716950932] [2021-10-03 12:20:04,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716950932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:04,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516782751] [2021-10-03 12:20:04,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:20:04,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:04,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:04,735 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) [2021-10-03 12:20:04,763 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 [2021-10-03 12:20:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:20:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-03 12:20:05,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516782751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:05,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:05,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-03 12:20:05,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188312731] [2021-10-03 12:20:05,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 12:20:05,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 12:20:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-03 12:20:05,081 INFO L87 Difference]: Start difference. First operand 1220 states and 4322 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:05,391 INFO L93 Difference]: Finished difference Result 2110 states and 7380 transitions. [2021-10-03 12:20:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:20:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 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 45 [2021-10-03 12:20:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:05,410 INFO L225 Difference]: With dead ends: 2110 [2021-10-03 12:20:05,410 INFO L226 Difference]: Without dead ends: 2002 [2021-10-03 12:20:05,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:20:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-10-03 12:20:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1550. [2021-10-03 12:20:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.564880568108457) internal successors, (5522), 1549 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5522 transitions. [2021-10-03 12:20:05,499 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5522 transitions. Word has length 45 [2021-10-03 12:20:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:05,499 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5522 transitions. [2021-10-03 12:20:05,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5522 transitions. [2021-10-03 12:20:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-03 12:20:05,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:05,507 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:05,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-03 12:20:05,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 12:20:05,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash 380308863, now seen corresponding path program 8 times [2021-10-03 12:20:05,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:05,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887325797] [2021-10-03 12:20:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:05,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-03 12:20:05,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:05,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887325797] [2021-10-03 12:20:05,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887325797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:05,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991708195] [2021-10-03 12:20:05,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:20:05,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:05,823 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) [2021-10-03 12:20:05,843 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 [2021-10-03 12:20:06,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:20:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-03 12:20:06,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-03 12:20:06,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991708195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:06,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:06,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-03 12:20:06,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615932694] [2021-10-03 12:20:06,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:20:06,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:20:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:20:06,274 INFO L87 Difference]: Start difference. First operand 1550 states and 5522 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:06,696 INFO L93 Difference]: Finished difference Result 2883 states and 9819 transitions. [2021-10-03 12:20:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:20:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 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 48 [2021-10-03 12:20:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:06,743 INFO L225 Difference]: With dead ends: 2883 [2021-10-03 12:20:06,743 INFO L226 Difference]: Without dead ends: 1552 [2021-10-03 12:20:06,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:20:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-10-03 12:20:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1552. [2021-10-03 12:20:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.5615731785944553) internal successors, (5524), 1551 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5524 transitions. [2021-10-03 12:20:06,811 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5524 transitions. Word has length 48 [2021-10-03 12:20:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:06,812 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5524 transitions. [2021-10-03 12:20:06,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5524 transitions. [2021-10-03 12:20:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-03 12:20:06,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:20:06,819 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:20:06,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-03 12:20:07,032 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,SelfDestructingSolverStorable15 [2021-10-03 12:20:07,033 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-03 12:20:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:20:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1009897724, now seen corresponding path program 9 times [2021-10-03 12:20:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:20:07,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049781973] [2021-10-03 12:20:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:20:07,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:20:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:20:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-03 12:20:07,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:20:07,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049781973] [2021-10-03 12:20:07,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049781973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:07,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801185240] [2021-10-03 12:20:07,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:20:07,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:20:07,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:20:07,146 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) [2021-10-03 12:20:07,163 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 [2021-10-03 12:20:07,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:20:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:20:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 12:20:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:20:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-03 12:20:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801185240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:20:07,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:20:07,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2021-10-03 12:20:07,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136299688] [2021-10-03 12:20:07,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:20:07,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:20:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:20:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:20:07,533 INFO L87 Difference]: Start difference. First operand 1552 states and 5524 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:20:08,844 INFO L93 Difference]: Finished difference Result 1770 states and 6261 transitions. [2021-10-03 12:20:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-03 12:20:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 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 50 [2021-10-03 12:20:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:20:08,845 INFO L225 Difference]: With dead ends: 1770 [2021-10-03 12:20:08,845 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 12:20:08,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=1192, Invalid=3364, Unknown=0, NotChecked=0, Total=4556 [2021-10-03 12:20:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 12:20:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 12:20:08,849 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) [2021-10-03 12:20:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 12:20:08,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-10-03 12:20:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:20:08,850 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 12:20:08,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:20:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 12:20:08,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 12:20:08,853 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:20:08,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:20:08,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:20:08,854 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-03 12:20:08,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-03 12:20:09,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-03 12:20:09,060 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:20:09,060 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:20:09,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:20:09 BasicIcfg [2021-10-03 12:20:09,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:20:09,063 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:20:09,063 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:20:09,064 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:20:09,064 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:19:49" (3/4) ... [2021-10-03 12:20:09,073 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 12:20:09,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 12:20:09,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 12:20:09,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-03 12:20:09,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-03 12:20:09,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-03 12:20:09,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:20:09,150 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:20:09,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:20:09,153 INFO L168 Benchmark]: Toolchain (without parser) took 21144.26 ms. Allocated memory was 48.2 MB in the beginning and 151.0 MB in the end (delta: 102.8 MB). Free memory was 24.8 MB in the beginning and 88.9 MB in the end (delta: -64.1 MB). Peak memory consumption was 89.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,153 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory is still 30.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:20:09,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.63 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 27.4 MB in the end (delta: -2.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.90 ms. Allocated memory is still 48.2 MB. Free memory was 27.2 MB in the beginning and 25.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:20:09,155 INFO L168 Benchmark]: Boogie Preprocessor took 73.64 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 24.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,155 INFO L168 Benchmark]: RCFGBuilder took 644.48 ms. Allocated memory is still 48.2 MB. Free memory was 24.0 MB in the beginning and 23.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,156 INFO L168 Benchmark]: TraceAbstraction took 19784.53 ms. Allocated memory was 48.2 MB in the beginning and 151.0 MB in the end (delta: 102.8 MB). Free memory was 22.4 MB in the beginning and 44.8 MB in the end (delta: -22.4 MB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,157 INFO L168 Benchmark]: Witness Printer took 87.28 ms. Allocated memory is still 151.0 MB. Free memory was 44.8 MB in the beginning and 88.9 MB in the end (delta: -44.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:20:09,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory is still 30.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 458.63 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 27.4 MB in the end (delta: -2.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.90 ms. Allocated memory is still 48.2 MB. Free memory was 27.2 MB in the beginning and 25.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.64 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 24.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 644.48 ms. Allocated memory is still 48.2 MB. Free memory was 24.0 MB in the beginning and 23.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19784.53 ms. Allocated memory was 48.2 MB in the beginning and 151.0 MB in the end (delta: 102.8 MB). Free memory was 22.4 MB in the beginning and 44.8 MB in the end (delta: -22.4 MB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. * Witness Printer took 87.28 ms. Allocated memory is still 151.0 MB. Free memory was 44.8 MB in the beginning and 88.9 MB in the end (delta: -44.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4588.2ms, 147 PlacesBefore, 38 PlacesAfterwards, 151 TransitionsBefore, 34 TransitionsAfterwards, 1714 CoEnabledTransitionPairs, 6 FixpointIterations, 79 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 132 TotalNumberOfCompositions, 2513 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1780, positive: 1701, positive conditional: 0, positive unconditional: 1701, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1088, positive: 1059, positive conditional: 0, positive unconditional: 1059, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1088, positive: 1059, positive conditional: 0, positive unconditional: 1059, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 29, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 81, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 81, negative conditional: 0, negative unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1780, positive: 642, positive conditional: 0, positive unconditional: 642, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 1088, unknown conditional: 0, unknown unconditional: 1088] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 100, Positive conditional cache size: 0, Positive unconditional cache size: 100, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - 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: 62]: 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 7 procedures, 173 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 19554.8ms, OverallIterations: 17, TraceHistogramMax: 4, EmptinessCheckTime: 90.5ms, AutomataDifference: 4664.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4667.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 763 SDtfs, 2230 SDslu, 2833 SDs, 0 SdLazy, 2504 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1660.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 773 GetRequests, 481 SyntacticMatches, 6 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2536.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1552occurred in iteration=16, InterpolantAutomatonStates: 235, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 710.0ms AutomataMinimizationTime, 17 MinimizatonAttempts, 2566 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 239.8ms SsaConstructionTime, 1162.6ms SatisfiabilityAnalysisTime, 3345.6ms InterpolantComputationTime, 1028 NumberOfCodeBlocks, 1005 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 3100 SizeOfPredicates, 45 NumberOfNonLiveVariables, 2816 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 363/518 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! [2021-10-03 12:20:09,204 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...