./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:15:38,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:15:38,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:15:38,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:15:38,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:15:38,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:15:38,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:15:38,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:15:38,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:15:38,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:15:38,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:15:38,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:15:38,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:15:38,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:15:38,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:15:38,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:15:38,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:15:38,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:15:38,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:15:38,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:15:38,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:15:38,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:15:38,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:15:38,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:15:38,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:15:38,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:15:38,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:15:38,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:15:38,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:15:38,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:15:38,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:15:38,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:15:38,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:15:38,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:15:38,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:15:38,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:15:38,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:15:38,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:15:38,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:15:38,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:15:38,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:15:38,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:15:38,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:15:38,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:15:38,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:15:38,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:15:38,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:15:38,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:15:38,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:15:38,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:15:38,304 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:15:38,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:15:38,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:15:38,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:15:38,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:15:38,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:15:38,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:15:38,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:15:38,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:15:38,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:15:38,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:15:38,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:15:38,308 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:15:38,308 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:15:38,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:15:38,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:15:38,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e [2021-12-22 12:15:38,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:15:38,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:15:38,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:15:38,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:15:38,514 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:15:38,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-22 12:15:38,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec406aaa/cb083be8edb84147b8818bd3cbdca638/FLAGcf0cae511 [2021-12-22 12:15:38,935 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:15:38,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-22 12:15:38,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec406aaa/cb083be8edb84147b8818bd3cbdca638/FLAGcf0cae511 [2021-12-22 12:15:38,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec406aaa/cb083be8edb84147b8818bd3cbdca638 [2021-12-22 12:15:38,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:15:38,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:15:38,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:15:38,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:15:38,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:15:38,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:15:38" (1/1) ... [2021-12-22 12:15:38,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ccba61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:38, skipping insertion in model container [2021-12-22 12:15:38,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:15:38" (1/1) ... [2021-12-22 12:15:38,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:15:38,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:15:39,246 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2021-12-22 12:15:39,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:15:39,298 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:15:39,339 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2021-12-22 12:15:39,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:15:39,377 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:15:39,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39 WrapperNode [2021-12-22 12:15:39,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:15:39,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:15:39,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:15:39,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:15:39,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,430 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 615 [2021-12-22 12:15:39,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:15:39,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:15:39,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:15:39,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:15:39,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:15:39,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:15:39,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:15:39,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:15:39,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (1/1) ... [2021-12-22 12:15:39,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:15:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:15:39,518 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) [2021-12-22 12:15:39,521 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 [2021-12-22 12:15:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:15:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:15:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:15:39,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:15:39,633 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:15:39,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:15:39,991 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:15:39,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:15:39,998 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:15:39,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:15:39 BoogieIcfgContainer [2021-12-22 12:15:39,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:15:40,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:15:40,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:15:40,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:15:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:15:38" (1/3) ... [2021-12-22 12:15:40,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51590d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:15:40, skipping insertion in model container [2021-12-22 12:15:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:15:39" (2/3) ... [2021-12-22 12:15:40,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51590d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:15:40, skipping insertion in model container [2021-12-22 12:15:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:15:39" (3/3) ... [2021-12-22 12:15:40,006 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-22 12:15:40,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:15:40,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:15:40,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:15:40,052 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 [2021-12-22 12:15:40,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:15:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.75177304964539) internal successors, (247), 142 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 12:15:40,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:40,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:40,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash -463597657, now seen corresponding path program 1 times [2021-12-22 12:15:40,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730638231] [2021-12-22 12:15:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:40,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:40,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:40,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730638231] [2021-12-22 12:15:40,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730638231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:40,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:40,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:40,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118055075] [2021-12-22 12:15:40,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:40,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:40,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:40,317 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.75177304964539) internal successors, (247), 142 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:40,391 INFO L93 Difference]: Finished difference Result 317 states and 535 transitions. [2021-12-22 12:15:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-22 12:15:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:40,400 INFO L225 Difference]: With dead ends: 317 [2021-12-22 12:15:40,400 INFO L226 Difference]: Without dead ends: 219 [2021-12-22 12:15:40,402 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 [2021-12-22 12:15:40,404 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 144 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:40,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 440 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-22 12:15:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2021-12-22 12:15:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.587962962962963) internal successors, (343), 216 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 343 transitions. [2021-12-22 12:15:40,436 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 343 transitions. Word has length 56 [2021-12-22 12:15:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:40,437 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 343 transitions. [2021-12-22 12:15:40,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 343 transitions. [2021-12-22 12:15:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 12:15:40,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:40,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:40,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:15:40,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash -452034936, now seen corresponding path program 1 times [2021-12-22 12:15:40,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056288032] [2021-12-22 12:15:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:40,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:40,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056288032] [2021-12-22 12:15:40,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056288032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:40,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:40,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:40,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497071725] [2021-12-22 12:15:40,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:40,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:40,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:40,517 INFO L87 Difference]: Start difference. First operand 217 states and 343 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:40,544 INFO L93 Difference]: Finished difference Result 533 states and 863 transitions. [2021-12-22 12:15:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-22 12:15:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:40,546 INFO L225 Difference]: With dead ends: 533 [2021-12-22 12:15:40,546 INFO L226 Difference]: Without dead ends: 367 [2021-12-22 12:15:40,547 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 [2021-12-22 12:15:40,548 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 125 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:40,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 409 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-22 12:15:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-12-22 12:15:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.60989010989011) internal successors, (586), 364 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 586 transitions. [2021-12-22 12:15:40,570 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 586 transitions. Word has length 58 [2021-12-22 12:15:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 586 transitions. [2021-12-22 12:15:40,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 586 transitions. [2021-12-22 12:15:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 12:15:40,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:40,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:15:40,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1416370665, now seen corresponding path program 1 times [2021-12-22 12:15:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:40,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269493773] [2021-12-22 12:15:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:40,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:40,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269493773] [2021-12-22 12:15:40,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269493773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:40,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:40,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695373140] [2021-12-22 12:15:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:40,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:40,665 INFO L87 Difference]: Start difference. First operand 365 states and 586 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:40,707 INFO L93 Difference]: Finished difference Result 961 states and 1564 transitions. [2021-12-22 12:15:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-22 12:15:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:40,712 INFO L225 Difference]: With dead ends: 961 [2021-12-22 12:15:40,712 INFO L226 Difference]: Without dead ends: 647 [2021-12-22 12:15:40,714 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 [2021-12-22 12:15:40,715 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 119 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:40,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 410 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-12-22 12:15:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2021-12-22 12:15:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.6180124223602483) internal successors, (1042), 644 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2021-12-22 12:15:40,769 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 60 [2021-12-22 12:15:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2021-12-22 12:15:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2021-12-22 12:15:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 12:15:40,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:40,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:40,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:15:40,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2105142966, now seen corresponding path program 1 times [2021-12-22 12:15:40,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:40,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548655513] [2021-12-22 12:15:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:40,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:40,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548655513] [2021-12-22 12:15:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548655513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:40,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:40,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:15:40,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546097596] [2021-12-22 12:15:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:40,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:15:40,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:15:40,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:40,847 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:41,059 INFO L93 Difference]: Finished difference Result 2801 states and 4612 transitions. [2021-12-22 12:15:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 12:15:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-22 12:15:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:41,068 INFO L225 Difference]: With dead ends: 2801 [2021-12-22 12:15:41,069 INFO L226 Difference]: Without dead ends: 2207 [2021-12-22 12:15:41,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:15:41,079 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 856 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:41,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1594 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:15:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-12-22 12:15:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1164. [2021-12-22 12:15:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 1.6268271711092004) internal successors, (1892), 1163 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1892 transitions. [2021-12-22 12:15:41,153 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1892 transitions. Word has length 62 [2021-12-22 12:15:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:41,154 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1892 transitions. [2021-12-22 12:15:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1892 transitions. [2021-12-22 12:15:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 12:15:41,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:41,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:41,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:15:41,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash -897426710, now seen corresponding path program 1 times [2021-12-22 12:15:41,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287415957] [2021-12-22 12:15:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:41,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:41,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:41,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287415957] [2021-12-22 12:15:41,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287415957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:41,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:41,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:15:41,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303822251] [2021-12-22 12:15:41,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:41,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:15:41,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:15:41,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:15:41,245 INFO L87 Difference]: Start difference. First operand 1164 states and 1892 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:41,392 INFO L93 Difference]: Finished difference Result 3403 states and 5593 transitions. [2021-12-22 12:15:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:15:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 12:15:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:41,401 INFO L225 Difference]: With dead ends: 3403 [2021-12-22 12:15:41,401 INFO L226 Difference]: Without dead ends: 2290 [2021-12-22 12:15:41,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:41,406 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 430 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:41,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 737 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-12-22 12:15:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1718. [2021-12-22 12:15:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 1.6319161327897496) internal successors, (2802), 1717 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2802 transitions. [2021-12-22 12:15:41,500 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2802 transitions. Word has length 63 [2021-12-22 12:15:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:41,502 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 2802 transitions. [2021-12-22 12:15:41,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2802 transitions. [2021-12-22 12:15:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:15:41,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:41,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:41,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:15:41,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash -384729531, now seen corresponding path program 1 times [2021-12-22 12:15:41,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:41,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000815047] [2021-12-22 12:15:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:41,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:41,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000815047] [2021-12-22 12:15:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000815047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:41,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75422697] [2021-12-22 12:15:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:41,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:41,570 INFO L87 Difference]: Start difference. First operand 1718 states and 2802 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:41,694 INFO L93 Difference]: Finished difference Result 3773 states and 6212 transitions. [2021-12-22 12:15:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:15:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:41,702 INFO L225 Difference]: With dead ends: 3773 [2021-12-22 12:15:41,702 INFO L226 Difference]: Without dead ends: 2585 [2021-12-22 12:15:41,703 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 [2021-12-22 12:15:41,704 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 132 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:41,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 500 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-12-22 12:15:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2583. [2021-12-22 12:15:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2582 states have (on average 1.6347792408985282) internal successors, (4221), 2582 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4221 transitions. [2021-12-22 12:15:41,810 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4221 transitions. Word has length 64 [2021-12-22 12:15:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 4221 transitions. [2021-12-22 12:15:41,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4221 transitions. [2021-12-22 12:15:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:15:41,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:41,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:41,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:15:41,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1071619613, now seen corresponding path program 1 times [2021-12-22 12:15:41,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166794028] [2021-12-22 12:15:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:41,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:41,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166794028] [2021-12-22 12:15:41,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166794028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:41,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:41,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:41,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462315081] [2021-12-22 12:15:41,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:41,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:41,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:41,889 INFO L87 Difference]: Start difference. First operand 2583 states and 4221 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:42,053 INFO L93 Difference]: Finished difference Result 5027 states and 8240 transitions. [2021-12-22 12:15:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:15:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:42,063 INFO L225 Difference]: With dead ends: 5027 [2021-12-22 12:15:42,063 INFO L226 Difference]: Without dead ends: 3593 [2021-12-22 12:15:42,064 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 [2021-12-22 12:15:42,065 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 126 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 486 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-22 12:15:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3591. [2021-12-22 12:15:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3590 states have (on average 1.6298050139275766) internal successors, (5851), 3590 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 5851 transitions. [2021-12-22 12:15:42,230 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 5851 transitions. Word has length 64 [2021-12-22 12:15:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:42,230 INFO L470 AbstractCegarLoop]: Abstraction has 3591 states and 5851 transitions. [2021-12-22 12:15:42,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 5851 transitions. [2021-12-22 12:15:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:15:42,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:42,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:15:42,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2108370415, now seen corresponding path program 1 times [2021-12-22 12:15:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595664347] [2021-12-22 12:15:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:42,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:42,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:42,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595664347] [2021-12-22 12:15:42,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595664347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:42,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:42,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:15:42,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909957940] [2021-12-22 12:15:42,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:42,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:15:42,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:15:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:15:42,263 INFO L87 Difference]: Start difference. First operand 3591 states and 5851 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:42,663 INFO L93 Difference]: Finished difference Result 11297 states and 18469 transitions. [2021-12-22 12:15:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:15:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:15:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:42,687 INFO L225 Difference]: With dead ends: 11297 [2021-12-22 12:15:42,688 INFO L226 Difference]: Without dead ends: 7775 [2021-12-22 12:15:42,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:42,693 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 429 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:42,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 729 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7775 states. [2021-12-22 12:15:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7775 to 5664. [2021-12-22 12:15:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 1.6238742715874979) internal successors, (9196), 5663 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 9196 transitions. [2021-12-22 12:15:43,073 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 9196 transitions. Word has length 64 [2021-12-22 12:15:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 9196 transitions. [2021-12-22 12:15:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 9196 transitions. [2021-12-22 12:15:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:15:43,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:43,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:15:43,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2012593663, now seen corresponding path program 1 times [2021-12-22 12:15:43,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:43,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394443574] [2021-12-22 12:15:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:43,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:43,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394443574] [2021-12-22 12:15:43,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394443574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:43,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:43,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:15:43,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979651556] [2021-12-22 12:15:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:43,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:15:43,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:15:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:15:43,133 INFO L87 Difference]: Start difference. First operand 5664 states and 9196 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:43,424 INFO L93 Difference]: Finished difference Result 11084 states and 18033 transitions. [2021-12-22 12:15:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:15:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:15:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:43,445 INFO L225 Difference]: With dead ends: 11084 [2021-12-22 12:15:43,445 INFO L226 Difference]: Without dead ends: 7832 [2021-12-22 12:15:43,449 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 [2021-12-22 12:15:43,450 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 120 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:43,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 463 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2021-12-22 12:15:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7830. [2021-12-22 12:15:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 7829 states have (on average 1.6157874568910462) internal successors, (12650), 7829 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 12650 transitions. [2021-12-22 12:15:43,823 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 12650 transitions. Word has length 64 [2021-12-22 12:15:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:43,824 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 12650 transitions. [2021-12-22 12:15:43,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 12650 transitions. [2021-12-22 12:15:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 12:15:43,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:43,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:43,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:15:43,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -988361583, now seen corresponding path program 1 times [2021-12-22 12:15:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953009075] [2021-12-22 12:15:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:43,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:43,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:43,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953009075] [2021-12-22 12:15:43,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953009075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:43,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:43,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:15:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723479576] [2021-12-22 12:15:43,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:43,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:15:43,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:15:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:15:43,903 INFO L87 Difference]: Start difference. First operand 7830 states and 12650 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:44,698 INFO L93 Difference]: Finished difference Result 24459 states and 39607 transitions. [2021-12-22 12:15:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:15:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-22 12:15:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:44,730 INFO L225 Difference]: With dead ends: 24459 [2021-12-22 12:15:44,730 INFO L226 Difference]: Without dead ends: 16714 [2021-12-22 12:15:44,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:44,740 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 427 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:44,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 716 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2021-12-22 12:15:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 12229. [2021-12-22 12:15:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 1.6075400719659798) internal successors, (19657), 12228 states have internal predecessors, (19657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 19657 transitions. [2021-12-22 12:15:45,337 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 19657 transitions. Word has length 65 [2021-12-22 12:15:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 12229 states and 19657 transitions. [2021-12-22 12:15:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 19657 transitions. [2021-12-22 12:15:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 12:15:45,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:45,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:45,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:15:45,339 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2145020638, now seen corresponding path program 1 times [2021-12-22 12:15:45,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:45,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091632457] [2021-12-22 12:15:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:45,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:45,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091632457] [2021-12-22 12:15:45,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091632457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:45,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:15:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395335645] [2021-12-22 12:15:45,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:45,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:15:45,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:15:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:45,440 INFO L87 Difference]: Start difference. First operand 12229 states and 19657 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:46,105 INFO L93 Difference]: Finished difference Result 24375 states and 39196 transitions. [2021-12-22 12:15:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:15:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-22 12:15:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:46,167 INFO L225 Difference]: With dead ends: 24375 [2021-12-22 12:15:46,167 INFO L226 Difference]: Without dead ends: 12231 [2021-12-22 12:15:46,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:15:46,184 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 428 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:46,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 588 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12231 states. [2021-12-22 12:15:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12231 to 12229. [2021-12-22 12:15:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 1.597317631665031) internal successors, (19532), 12228 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 19532 transitions. [2021-12-22 12:15:46,917 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 19532 transitions. Word has length 67 [2021-12-22 12:15:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:46,917 INFO L470 AbstractCegarLoop]: Abstraction has 12229 states and 19532 transitions. [2021-12-22 12:15:46,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 19532 transitions. [2021-12-22 12:15:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 12:15:46,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:46,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:46,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:15:46,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash 460006403, now seen corresponding path program 1 times [2021-12-22 12:15:46,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:46,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405667722] [2021-12-22 12:15:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:46,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:46,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:46,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405667722] [2021-12-22 12:15:46,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405667722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:46,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:46,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:15:46,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146374192] [2021-12-22 12:15:46,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:46,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:15:46,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:15:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:46,994 INFO L87 Difference]: Start difference. First operand 12229 states and 19532 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:48,108 INFO L93 Difference]: Finished difference Result 35007 states and 56056 transitions. [2021-12-22 12:15:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:15:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-22 12:15:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:48,233 INFO L225 Difference]: With dead ends: 35007 [2021-12-22 12:15:48,233 INFO L226 Difference]: Without dead ends: 22863 [2021-12-22 12:15:48,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:15:48,245 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 422 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:48,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 595 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22863 states. [2021-12-22 12:15:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22863 to 22861. [2021-12-22 12:15:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22861 states, 22860 states have (on average 1.585870516185477) internal successors, (36253), 22860 states have internal predecessors, (36253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22861 states to 22861 states and 36253 transitions. [2021-12-22 12:15:49,414 INFO L78 Accepts]: Start accepts. Automaton has 22861 states and 36253 transitions. Word has length 70 [2021-12-22 12:15:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:49,414 INFO L470 AbstractCegarLoop]: Abstraction has 22861 states and 36253 transitions. [2021-12-22 12:15:49,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 22861 states and 36253 transitions. [2021-12-22 12:15:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 12:15:49,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:49,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:49,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:15:49,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1373387295, now seen corresponding path program 1 times [2021-12-22 12:15:49,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207322674] [2021-12-22 12:15:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:49,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:15:49,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207322674] [2021-12-22 12:15:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207322674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:49,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:49,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:15:49,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147463033] [2021-12-22 12:15:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:15:49,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:15:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:49,483 INFO L87 Difference]: Start difference. First operand 22861 states and 36253 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:52,173 INFO L93 Difference]: Finished difference Result 43692 states and 68963 transitions. [2021-12-22 12:15:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:15:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-22 12:15:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:52,312 INFO L225 Difference]: With dead ends: 43692 [2021-12-22 12:15:52,313 INFO L226 Difference]: Without dead ends: 43690 [2021-12-22 12:15:52,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:15:52,337 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 268 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:52,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1026 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43690 states. [2021-12-22 12:15:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43690 to 23585. [2021-12-22 12:15:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23585 states, 23584 states have (on average 1.567503392130258) internal successors, (36968), 23584 states have internal predecessors, (36968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23585 states to 23585 states and 36968 transitions. [2021-12-22 12:15:54,073 INFO L78 Accepts]: Start accepts. Automaton has 23585 states and 36968 transitions. Word has length 71 [2021-12-22 12:15:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:15:54,073 INFO L470 AbstractCegarLoop]: Abstraction has 23585 states and 36968 transitions. [2021-12-22 12:15:54,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23585 states and 36968 transitions. [2021-12-22 12:15:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 12:15:54,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:15:54,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:15:54,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:15:54,076 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:15:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:15:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1977084468, now seen corresponding path program 1 times [2021-12-22 12:15:54,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:15:54,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435973338] [2021-12-22 12:15:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:15:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:15:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:15:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:15:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:15:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435973338] [2021-12-22 12:15:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435973338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:15:54,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:15:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:15:54,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465974733] [2021-12-22 12:15:54,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:15:54,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:15:54,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:15:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:15:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:15:54,132 INFO L87 Difference]: Start difference. First operand 23585 states and 36968 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:15:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:15:57,374 INFO L93 Difference]: Finished difference Result 57661 states and 90684 transitions. [2021-12-22 12:15:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:15:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-22 12:15:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:15:57,453 INFO L225 Difference]: With dead ends: 57661 [2021-12-22 12:15:57,453 INFO L226 Difference]: Without dead ends: 46299 [2021-12-22 12:15:57,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:15:57,481 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 553 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:15:57,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 1002 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:15:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46299 states. [2021-12-22 12:16:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46299 to 36193. [2021-12-22 12:16:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36193 states, 36192 states have (on average 1.5653183023872679) internal successors, (56652), 36192 states have internal predecessors, (56652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36193 states to 36193 states and 56652 transitions. [2021-12-22 12:16:00,280 INFO L78 Accepts]: Start accepts. Automaton has 36193 states and 56652 transitions. Word has length 95 [2021-12-22 12:16:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 36193 states and 56652 transitions. [2021-12-22 12:16:00,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36193 states and 56652 transitions. [2021-12-22 12:16:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 12:16:00,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:00,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:00,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:16:00,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1290194386, now seen corresponding path program 1 times [2021-12-22 12:16:00,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:00,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375581124] [2021-12-22 12:16:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:00,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 12:16:00,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:00,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375581124] [2021-12-22 12:16:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375581124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:00,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:00,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:00,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653712918] [2021-12-22 12:16:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:00,359 INFO L87 Difference]: Start difference. First operand 36193 states and 56652 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:03,816 INFO L93 Difference]: Finished difference Result 64663 states and 101696 transitions. [2021-12-22 12:16:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-22 12:16:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:03,912 INFO L225 Difference]: With dead ends: 64663 [2021-12-22 12:16:03,912 INFO L226 Difference]: Without dead ends: 53531 [2021-12-22 12:16:03,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:16:03,938 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 552 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:03,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 977 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53531 states. [2021-12-22 12:16:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53531 to 49013. [2021-12-22 12:16:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49013 states, 49012 states have (on average 1.5667183546886476) internal successors, (76788), 49012 states have internal predecessors, (76788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49013 states to 49013 states and 76788 transitions. [2021-12-22 12:16:07,687 INFO L78 Accepts]: Start accepts. Automaton has 49013 states and 76788 transitions. Word has length 95 [2021-12-22 12:16:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:07,687 INFO L470 AbstractCegarLoop]: Abstraction has 49013 states and 76788 transitions. [2021-12-22 12:16:07,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49013 states and 76788 transitions. [2021-12-22 12:16:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 12:16:07,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:07,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:07,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:16:07,690 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash 349220336, now seen corresponding path program 1 times [2021-12-22 12:16:07,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:07,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776755942] [2021-12-22 12:16:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:07,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 12:16:07,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776755942] [2021-12-22 12:16:07,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776755942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:07,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:07,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:16:07,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478356959] [2021-12-22 12:16:07,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:07,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:16:07,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:16:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:16:07,732 INFO L87 Difference]: Start difference. First operand 49013 states and 76788 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:11,441 INFO L93 Difference]: Finished difference Result 69083 states and 108644 transitions. [2021-12-22 12:16:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:16:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-22 12:16:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:11,572 INFO L225 Difference]: With dead ends: 69083 [2021-12-22 12:16:11,573 INFO L226 Difference]: Without dead ends: 57951 [2021-12-22 12:16:11,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:16:11,609 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 557 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:11,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 1007 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57951 states. [2021-12-22 12:16:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57951 to 56153. [2021-12-22 12:16:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56153 states, 56152 states have (on average 1.5683145747257443) internal successors, (88064), 56152 states have internal predecessors, (88064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56153 states to 56153 states and 88064 transitions. [2021-12-22 12:16:15,742 INFO L78 Accepts]: Start accepts. Automaton has 56153 states and 88064 transitions. Word has length 95 [2021-12-22 12:16:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:15,742 INFO L470 AbstractCegarLoop]: Abstraction has 56153 states and 88064 transitions. [2021-12-22 12:16:15,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 56153 states and 88064 transitions. [2021-12-22 12:16:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 12:16:15,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:15,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:15,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:16:15,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1097572160, now seen corresponding path program 1 times [2021-12-22 12:16:15,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985928913] [2021-12-22 12:16:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:15,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:16:15,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985928913] [2021-12-22 12:16:15,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985928913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:15,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:15,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:16:15,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499514438] [2021-12-22 12:16:15,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:15,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:16:15,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:16:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:15,785 INFO L87 Difference]: Start difference. First operand 56153 states and 88064 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:16:20,571 INFO L93 Difference]: Finished difference Result 91416 states and 144033 transitions. [2021-12-22 12:16:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:16:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-22 12:16:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:16:20,718 INFO L225 Difference]: With dead ends: 91416 [2021-12-22 12:16:20,719 INFO L226 Difference]: Without dead ends: 72822 [2021-12-22 12:16:20,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:16:20,757 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 242 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:16:20,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 751 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:16:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72822 states. [2021-12-22 12:16:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72822 to 71026. [2021-12-22 12:16:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71026 states, 71025 states have (on average 1.5684899683210136) internal successors, (111402), 71025 states have internal predecessors, (111402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71026 states to 71026 states and 111402 transitions. [2021-12-22 12:16:26,603 INFO L78 Accepts]: Start accepts. Automaton has 71026 states and 111402 transitions. Word has length 96 [2021-12-22 12:16:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:16:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 71026 states and 111402 transitions. [2021-12-22 12:16:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:16:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 71026 states and 111402 transitions. [2021-12-22 12:16:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 12:16:26,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:16:26,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:16:26,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:16:26,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:16:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:16:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 748884206, now seen corresponding path program 1 times [2021-12-22 12:16:26,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:16:26,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338796510] [2021-12-22 12:16:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:16:26,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:16:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:16:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:16:26,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:16:26,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338796510] [2021-12-22 12:16:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338796510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:16:26,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:16:26,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:16:26,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908668469] [2021-12-22 12:16:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:16:26,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:16:26,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:16:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:16:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:16:26,637 INFO L87 Difference]: Start difference. First operand 71026 states and 111402 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)