./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:23:02,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:23:02,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:23:02,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:23:02,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:23:02,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:23:02,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:23:02,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:23:02,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:23:02,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:23:02,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:23:02,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:23:02,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:23:02,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:23:02,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:23:02,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:23:02,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:23:02,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:23:02,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:23:02,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:23:02,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:23:02,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:23:02,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:23:02,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:23:02,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:23:02,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:23:02,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:23:02,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:23:02,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:23:02,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:23:02,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:23:02,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:23:02,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:23:02,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:23:02,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:23:02,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:23:02,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:23:02,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:23:02,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:23:02,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:23:02,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:23:02,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:23:02,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:23:02,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:23:02,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:23:02,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:23:02,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:23:02,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:23:02,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:23:02,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:23:02,369 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:23:02,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:23:02,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:23:02,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:23:02,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:23:02,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:23:02,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:23:02,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:23:02,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:23:02,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:23:02,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:23:02,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:23:02,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:23:02,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 [2021-12-21 12:23:02,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:23:02,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:23:02,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:23:02,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:23:02,574 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:23:02,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2021-12-21 12:23:02,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c81d557/2e18175cf1b148e9ae5770c678c7692d/FLAGd9381341f [2021-12-21 12:23:02,981 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:23:02,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2021-12-21 12:23:02,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c81d557/2e18175cf1b148e9ae5770c678c7692d/FLAGd9381341f [2021-12-21 12:23:03,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c81d557/2e18175cf1b148e9ae5770c678c7692d [2021-12-21 12:23:03,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:23:03,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:23:03,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:23:03,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:23:03,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:23:03,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e605d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03, skipping insertion in model container [2021-12-21 12:23:03,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:23:03,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:23:03,185 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] [2021-12-21 12:23:03,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:23:03,204 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:23:03,213 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] [2021-12-21 12:23:03,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:23:03,229 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:23:03,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03 WrapperNode [2021-12-21 12:23:03,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:23:03,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:23:03,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:23:03,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:23:03,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,255 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2021-12-21 12:23:03,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:23:03,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:23:03,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:23:03,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:23:03,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:23:03,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:23:03,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:23:03,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:23:03,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (1/1) ... [2021-12-21 12:23:03,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:23:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:03,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:23:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:23:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:23:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:23:03,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:23:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:23:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:23:03,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:23:03,387 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:23:03,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:23:03,465 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:23:03,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:23:03,469 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:23:03,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:23:03 BoogieIcfgContainer [2021-12-21 12:23:03,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:23:03,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:23:03,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:23:03,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:23:03,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:23:03" (1/3) ... [2021-12-21 12:23:03,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f07ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:23:03, skipping insertion in model container [2021-12-21 12:23:03,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:23:03" (2/3) ... [2021-12-21 12:23:03,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f07ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:23:03, skipping insertion in model container [2021-12-21 12:23:03,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:23:03" (3/3) ... [2021-12-21 12:23:03,476 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2021-12-21 12:23:03,479 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:23:03,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:23:03,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:23:03,510 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:23:03,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:23:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:23:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:23:03,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:03,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:03,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash 537015905, now seen corresponding path program 1 times [2021-12-21 12:23:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:03,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241827786] [2021-12-21 12:23:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:23:03,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241827786] [2021-12-21 12:23:03,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241827786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:23:03,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:23:03,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:23:03,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064124744] [2021-12-21 12:23:03,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:23:03,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:23:03,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:23:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:23:03,658 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:03,670 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-12-21 12:23:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:23:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 12:23:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:03,675 INFO L225 Difference]: With dead ends: 30 [2021-12-21 12:23:03,676 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 12:23:03,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:23:03,680 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:03,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 12:23:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 12:23:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-21 12:23:03,702 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-12-21 12:23:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:03,703 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-21 12:23:03,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-12-21 12:23:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:23:03,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:03,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:03,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:23:03,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 250724395, now seen corresponding path program 1 times [2021-12-21 12:23:03,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524458913] [2021-12-21 12:23:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:23:03,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524458913] [2021-12-21 12:23:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524458913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:23:03,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:23:03,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:23:03,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986810619] [2021-12-21 12:23:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:23:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:23:03,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:23:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:23:03,734 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:03,787 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-12-21 12:23:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:23:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 12:23:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:03,789 INFO L225 Difference]: With dead ends: 26 [2021-12-21 12:23:03,789 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 12:23:03,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:23:03,790 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:03,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 12:23:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-21 12:23:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-12-21 12:23:03,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-12-21 12:23:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:03,794 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-12-21 12:23:03,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-12-21 12:23:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 12:23:03,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:03,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:03,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:23:03,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 697472654, now seen corresponding path program 1 times [2021-12-21 12:23:03,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416034346] [2021-12-21 12:23:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:03,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:23:03,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416034346] [2021-12-21 12:23:03,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416034346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:23:03,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:23:03,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:23:03,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819252707] [2021-12-21 12:23:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:23:03,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:23:03,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:23:03,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:23:03,827 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:03,833 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-12-21 12:23:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:23:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 12:23:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:03,834 INFO L225 Difference]: With dead ends: 24 [2021-12-21 12:23:03,834 INFO L226 Difference]: Without dead ends: 16 [2021-12-21 12:23:03,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:23:03,836 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:03,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-21 12:23:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-21 12:23:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-21 12:23:03,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-12-21 12:23:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:03,839 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-21 12:23:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-21 12:23:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:23:03,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:03,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:03,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:23:03,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 183157912, now seen corresponding path program 1 times [2021-12-21 12:23:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:03,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931429701] [2021-12-21 12:23:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:03,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:23:03,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931429701] [2021-12-21 12:23:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931429701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829666767] [2021-12-21 12:23:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:03,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:03,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:03,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:03,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:23:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:23:03,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:23:03,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:23:04,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829666767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:04,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:04,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 12:23:04,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876203179] [2021-12-21 12:23:04,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:23:04,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:23:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:23:04,035 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:04,074 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-21 12:23:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:23:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:23:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:04,076 INFO L225 Difference]: With dead ends: 33 [2021-12-21 12:23:04,076 INFO L226 Difference]: Without dead ends: 21 [2021-12-21 12:23:04,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:23:04,078 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:04,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-21 12:23:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-21 12:23:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-21 12:23:04,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-12-21 12:23:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-21 12:23:04,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-21 12:23:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:23:04,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:04,090 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:04,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 12:23:04,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:04,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:04,291 INFO L85 PathProgramCache]: Analyzing trace with hash -26222837, now seen corresponding path program 1 times [2021-12-21 12:23:04,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343439422] [2021-12-21 12:23:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:04,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:04,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343439422] [2021-12-21 12:23:04,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343439422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300385811] [2021-12-21 12:23:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:04,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:04,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:04,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:04,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:23:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:23:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:04,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300385811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:04,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:04,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-21 12:23:04,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713568416] [2021-12-21 12:23:04,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:04,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:23:04,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:23:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:23:04,472 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:04,501 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-12-21 12:23:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:23:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 12:23:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:04,502 INFO L225 Difference]: With dead ends: 44 [2021-12-21 12:23:04,502 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 12:23:04,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:23:04,503 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:04,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 12:23:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 12:23:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-21 12:23:04,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-21 12:23:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-21 12:23:04,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-21 12:23:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 12:23:04,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:04,514 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:04,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:04,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:04,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:04,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1794637953, now seen corresponding path program 2 times [2021-12-21 12:23:04,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:04,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954801927] [2021-12-21 12:23:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:04,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:04,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954801927] [2021-12-21 12:23:04,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954801927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189263432] [2021-12-21 12:23:04,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:23:04,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:04,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:04,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:23:04,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:23:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 12:23:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:04,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189263432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:05,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-21 12:23:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410651383] [2021-12-21 12:23:05,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 12:23:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 12:23:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:23:05,030 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:05,084 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-12-21 12:23:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 12:23:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 12:23:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:05,088 INFO L225 Difference]: With dead ends: 60 [2021-12-21 12:23:05,088 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 12:23:05,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:23:05,090 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:05,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 12:23:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-21 12:23:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-21 12:23:05,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 25 [2021-12-21 12:23:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:05,097 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-21 12:23:05,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-21 12:23:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 12:23:05,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:05,099 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:05,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:05,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:05,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:05,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2939801, now seen corresponding path program 3 times [2021-12-21 12:23:05,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:05,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113395677] [2021-12-21 12:23:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:05,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:23:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113395677] [2021-12-21 12:23:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113395677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925065302] [2021-12-21 12:23:05,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:23:05,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:05,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:05,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:23:05,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 12:23:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:23:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-21 12:23:05,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-21 12:23:05,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925065302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:05,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:05,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2021-12-21 12:23:05,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928857032] [2021-12-21 12:23:05,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 12:23:05,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 12:23:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-21 12:23:05,700 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:05,872 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-12-21 12:23:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 12:23:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 12:23:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:05,874 INFO L225 Difference]: With dead ends: 71 [2021-12-21 12:23:05,874 INFO L226 Difference]: Without dead ends: 56 [2021-12-21 12:23:05,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 12:23:05,875 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:05,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:23:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-21 12:23:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-12-21 12:23:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.108695652173913) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-21 12:23:05,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2021-12-21 12:23:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-21 12:23:05,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-21 12:23:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 12:23:05,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:05,882 INFO L514 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:05,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:06,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:06,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 841794498, now seen corresponding path program 4 times [2021-12-21 12:23:06,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068952370] [2021-12-21 12:23:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:06,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:06,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068952370] [2021-12-21 12:23:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068952370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680092535] [2021-12-21 12:23:06,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:23:06,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:06,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:06,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:23:06,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:23:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 12:23:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:06,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680092535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:06,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:06,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-21 12:23:06,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907845361] [2021-12-21 12:23:06,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:06,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 12:23:06,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 12:23:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 12:23:06,684 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:06,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:06,761 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2021-12-21 12:23:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 12:23:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-21 12:23:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:06,764 INFO L225 Difference]: With dead ends: 102 [2021-12-21 12:23:06,764 INFO L226 Difference]: Without dead ends: 84 [2021-12-21 12:23:06,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 12:23:06,765 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:06,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:23:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-21 12:23:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-21 12:23:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0625) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-21 12:23:06,789 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 46 [2021-12-21 12:23:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-21 12:23:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-21 12:23:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 12:23:06,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:06,792 INFO L514 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:06,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:07,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:07,003 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1727450091, now seen corresponding path program 5 times [2021-12-21 12:23:07,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:07,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164987957] [2021-12-21 12:23:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:07,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:07,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164987957] [2021-12-21 12:23:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164987957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106997481] [2021-12-21 12:23:07,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:23:07,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:07,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:07,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:07,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:23:07,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-21 12:23:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 12:23:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:07,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106997481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:08,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:08,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-12-21 12:23:08,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974809054] [2021-12-21 12:23:08,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:08,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-21 12:23:08,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-21 12:23:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 12:23:08,719 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:08,858 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2021-12-21 12:23:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-21 12:23:08,859 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-21 12:23:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:08,860 INFO L225 Difference]: With dead ends: 170 [2021-12-21 12:23:08,860 INFO L226 Difference]: Without dead ends: 152 [2021-12-21 12:23:08,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 12:23:08,866 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:08,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:23:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-21 12:23:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-21 12:23:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 149 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:23:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-12-21 12:23:08,891 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 80 [2021-12-21 12:23:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:08,891 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-12-21 12:23:08,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-12-21 12:23:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-21 12:23:08,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:08,897 INFO L514 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:08,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:09,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:09,098 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 438683259, now seen corresponding path program 6 times [2021-12-21 12:23:09,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:09,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747152561] [2021-12-21 12:23:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:09,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 12:23:10,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747152561] [2021-12-21 12:23:10,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747152561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224172280] [2021-12-21 12:23:10,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 12:23:10,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:10,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:10,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:23:10,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 12:23:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:10,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:23:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2021-12-21 12:23:10,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4628 trivial. 0 not checked. [2021-12-21 12:23:11,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224172280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:11,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:11,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 6] total 78 [2021-12-21 12:23:11,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929932944] [2021-12-21 12:23:11,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:11,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-21 12:23:11,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-21 12:23:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3637, Unknown=0, NotChecked=0, Total=6006 [2021-12-21 12:23:11,364 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:13,202 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2021-12-21 12:23:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-21 12:23:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-21 12:23:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:13,204 INFO L225 Difference]: With dead ends: 182 [2021-12-21 12:23:13,204 INFO L226 Difference]: Without dead ends: 164 [2021-12-21 12:23:13,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7130, Invalid=14040, Unknown=0, NotChecked=0, Total=21170 [2021-12-21 12:23:13,208 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:13,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:23:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-21 12:23:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-12-21 12:23:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:23:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2021-12-21 12:23:13,216 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 148 [2021-12-21 12:23:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:13,217 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2021-12-21 12:23:13,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2021-12-21 12:23:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-21 12:23:13,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:13,218 INFO L514 BasicCegarLoop]: trace histogram [69, 67, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:13,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:13,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:13,437 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash -376920888, now seen corresponding path program 7 times [2021-12-21 12:23:13,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:13,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237212604] [2021-12-21 12:23:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:13,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:14,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:14,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237212604] [2021-12-21 12:23:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237212604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:14,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568593787] [2021-12-21 12:23:14,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 12:23:14,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:14,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:14,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:23:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-21 12:23:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568593787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:19,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2021-12-21 12:23:19,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566414934] [2021-12-21 12:23:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:19,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-21 12:23:19,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-21 12:23:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-21 12:23:19,293 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:19,635 INFO L93 Difference]: Finished difference Result 322 states and 401 transitions. [2021-12-21 12:23:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-21 12:23:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-21 12:23:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:19,650 INFO L225 Difference]: With dead ends: 322 [2021-12-21 12:23:19,650 INFO L226 Difference]: Without dead ends: 298 [2021-12-21 12:23:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-12-21 12:23:19,655 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:19,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 12:23:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-21 12:23:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-12-21 12:23:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0205479452054795) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:23:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 303 transitions. [2021-12-21 12:23:19,666 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 303 transitions. Word has length 151 [2021-12-21 12:23:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:19,667 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 303 transitions. [2021-12-21 12:23:19,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 303 transitions. [2021-12-21 12:23:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-21 12:23:19,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:19,672 INFO L514 BasicCegarLoop]: trace histogram [138, 136, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:19,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 12:23:19,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 12:23:19,888 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2063818681, now seen corresponding path program 8 times [2021-12-21 12:23:19,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409361114] [2021-12-21 12:23:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:19,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:25,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409361114] [2021-12-21 12:23:25,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409361114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797637769] [2021-12-21 12:23:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:23:25,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:25,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:25,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:23:25,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:23:25,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-21 12:23:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:25,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:41,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797637769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:41,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:41,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2021-12-21 12:23:41,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084015986] [2021-12-21 12:23:41,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:41,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2021-12-21 12:23:41,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2021-12-21 12:23:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-21 12:23:41,185 INFO L87 Difference]: Start difference. First operand 298 states and 303 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:42,201 INFO L93 Difference]: Finished difference Result 598 states and 746 transitions. [2021-12-21 12:23:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-12-21 12:23:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-12-21 12:23:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:42,205 INFO L225 Difference]: With dead ends: 598 [2021-12-21 12:23:42,205 INFO L226 Difference]: Without dead ends: 574 [2021-12-21 12:23:42,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-12-21 12:23:42,209 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:42,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:23:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-12-21 12:23:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-12-21 12:23:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 568 states have (on average 1.0105633802816902) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:23:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 579 transitions. [2021-12-21 12:23:42,225 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 579 transitions. Word has length 289 [2021-12-21 12:23:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:42,226 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 579 transitions. [2021-12-21 12:23:42,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:23:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 579 transitions. [2021-12-21 12:23:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-12-21 12:23:42,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:42,231 INFO L514 BasicCegarLoop]: trace histogram [276, 274, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:42,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:42,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:42,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2105112101, now seen corresponding path program 9 times [2021-12-21 12:23:42,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:42,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717541248] [2021-12-21 12:23:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:42,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:24:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:24:02,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:24:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717541248] [2021-12-21 12:24:02,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717541248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:24:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393122127] [2021-12-21 12:24:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:24:02,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:24:02,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:24:02,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:24:02,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:24:02,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 12:24:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:24:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:24:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:24:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2021-12-21 12:24:04,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:24:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2021-12-21 12:24:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393122127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:24:05,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:24:05,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 9, 9] total 291 [2021-12-21 12:24:05,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423486300] [2021-12-21 12:24:05,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:24:05,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2021-12-21 12:24:05,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:24:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2021-12-21 12:24:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38345, Invalid=46045, Unknown=0, NotChecked=0, Total=84390 [2021-12-21 12:24:05,540 INFO L87 Difference]: Start difference. First operand 574 states and 579 transitions. Second operand has 291 states, 291 states have (on average 2.013745704467354) internal successors, (586), 291 states have internal predecessors, (586), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)