./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.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_floodmax.4.ufo.BOUNDED-8.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 776b90327165ac118ff91f6400c534443904a40947197045cc27be476415edd1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:01:33,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:01:33,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:01:33,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:01:33,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:01:33,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:01:33,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:01:33,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:01:33,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:01:33,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:01:33,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:01:33,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:01:33,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:01:33,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:01:33,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:01:33,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:01:33,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:01:33,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:01:33,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:01:33,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:01:33,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:01:33,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:01:33,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:01:33,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:01:33,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:01:33,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:01:33,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:01:33,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:01:33,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:01:33,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:01:33,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:01:33,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:01:33,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:01:33,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:01:33,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:01:33,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:01:33,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:01:33,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:01:33,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:01:33,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:01:33,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:01:33,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:01:33,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:01:33,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:01:33,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:01:33,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:01:33,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:01:33,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:01:33,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:01:33,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:01:33,275 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:01:33,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:01:33,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:01:33,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:01:33,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:01:33,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:01:33,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:01:33,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:01:33,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:01:33,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:01:33,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:01:33,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:01:33,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:01:33,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:01:33,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:01:33,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:01:33,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:01:33,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:01:33,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:01:33,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:01:33,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:01:33,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776b90327165ac118ff91f6400c534443904a40947197045cc27be476415edd1 [2021-12-22 12:01:33,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:01:33,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:01:33,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:01:33,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:01:33,467 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:01:33,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-22 12:01:33,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8d7c867/1785317404e7479195126cc9c74cb9f1/FLAG041e2b834 [2021-12-22 12:01:33,984 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:01:33,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-22 12:01:34,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8d7c867/1785317404e7479195126cc9c74cb9f1/FLAG041e2b834 [2021-12-22 12:01:34,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8d7c867/1785317404e7479195126cc9c74cb9f1 [2021-12-22 12:01:34,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:01:34,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:01:34,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:01:34,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:01:34,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:01:34,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6a2e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34, skipping insertion in model container [2021-12-22 12:01:34,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:01:34,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:01:34,330 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_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2021-12-22 12:01:34,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:01:34,420 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:01:34,473 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_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2021-12-22 12:01:34,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:01:34,541 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:01:34,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34 WrapperNode [2021-12-22 12:01:34,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:01:34,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:01:34,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:01:34,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:01:34,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,628 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2021-12-22 12:01:34,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:01:34,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:01:34,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:01:34,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:01:34,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:01:34,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:01:34,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:01:34,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:01:34,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 12:01:34,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:01:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:01:34,756 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 12:01:34,775 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 12:01:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:01:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:01:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:01:34,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:01:34,950 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:01:34,952 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:01:35,690 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:01:35,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:01:35,700 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:01:35,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:35 BoogieIcfgContainer [2021-12-22 12:01:35,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:01:35,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:01:35,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:01:35,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:01:35,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:01:34" (1/3) ... [2021-12-22 12:01:35,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc261a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:35, skipping insertion in model container [2021-12-22 12:01:35,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (2/3) ... [2021-12-22 12:01:35,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc261a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:35, skipping insertion in model container [2021-12-22 12:01:35,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:35" (3/3) ... [2021-12-22 12:01:35,710 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-22 12:01:35,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:01:35,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:01:35,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:01:35,774 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 12:01:35,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:01:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 319 states, 317 states have (on average 1.804416403785489) internal successors, (572), 318 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 12:01:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 12:01:35,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:35,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:35,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 304488522, now seen corresponding path program 1 times [2021-12-22 12:01:35,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555901353] [2021-12-22 12:01:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:35,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:36,154 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 12:01:36,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555901353] [2021-12-22 12:01:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555901353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:36,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:36,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796849552] [2021-12-22 12:01:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:36,190 INFO L87 Difference]: Start difference. First operand has 319 states, 317 states have (on average 1.804416403785489) internal successors, (572), 318 states have internal predecessors, (572), 0 states have call successors, (0), 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 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:36,291 INFO L93 Difference]: Finished difference Result 568 states and 991 transitions. [2021-12-22 12:01:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-22 12:01:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:36,306 INFO L225 Difference]: With dead ends: 568 [2021-12-22 12:01:36,307 INFO L226 Difference]: Without dead ends: 432 [2021-12-22 12:01:36,312 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 12:01:36,315 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 222 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1218 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 12:01:36,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1218 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-12-22 12:01:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2021-12-22 12:01:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.6643356643356644) internal successors, (714), 429 states have internal predecessors, (714), 0 states have call successors, (0), 0 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 12:01:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2021-12-22 12:01:36,387 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 111 [2021-12-22 12:01:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:36,388 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2021-12-22 12:01:36,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2021-12-22 12:01:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-22 12:01:36,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:36,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:36,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:01:36,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1517208970, now seen corresponding path program 1 times [2021-12-22 12:01:36,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:36,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788408983] [2021-12-22 12:01:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:36,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:36,555 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 12:01:36,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:36,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788408983] [2021-12-22 12:01:36,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788408983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:36,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759899538] [2021-12-22 12:01:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:36,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:36,560 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:36,600 INFO L93 Difference]: Finished difference Result 660 states and 1105 transitions. [2021-12-22 12:01:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-22 12:01:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:36,604 INFO L225 Difference]: With dead ends: 660 [2021-12-22 12:01:36,604 INFO L226 Difference]: Without dead ends: 533 [2021-12-22 12:01:36,605 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 12:01:36,607 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 196 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1173 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 12:01:36,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1173 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-22 12:01:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2021-12-22 12:01:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.6716981132075472) internal successors, (886), 530 states have internal predecessors, (886), 0 states have call successors, (0), 0 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 12:01:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2021-12-22 12:01:36,635 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 114 [2021-12-22 12:01:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2021-12-22 12:01:36,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2021-12-22 12:01:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-22 12:01:36,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:36,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:36,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:01:36,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:36,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1179194652, now seen corresponding path program 1 times [2021-12-22 12:01:36,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:36,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381098090] [2021-12-22 12:01:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:36,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:36,738 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 12:01:36,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:36,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381098090] [2021-12-22 12:01:36,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381098090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:36,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:36,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:36,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245601863] [2021-12-22 12:01:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:36,742 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:36,789 INFO L93 Difference]: Finished difference Result 1184 states and 1985 transitions. [2021-12-22 12:01:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:36,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-22 12:01:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:36,793 INFO L225 Difference]: With dead ends: 1184 [2021-12-22 12:01:36,793 INFO L226 Difference]: Without dead ends: 844 [2021-12-22 12:01:36,795 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 12:01:36,796 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 189 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1151 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 12:01:36,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1151 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-22 12:01:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2021-12-22 12:01:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.671819262782402) internal successors, (1406), 841 states have internal predecessors, (1406), 0 states have call successors, (0), 0 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 12:01:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1406 transitions. [2021-12-22 12:01:36,845 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1406 transitions. Word has length 114 [2021-12-22 12:01:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1406 transitions. [2021-12-22 12:01:36,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1406 transitions. [2021-12-22 12:01:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 12:01:36,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:36,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:36,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:01:36,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash -236553538, now seen corresponding path program 1 times [2021-12-22 12:01:36,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:36,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619650999] [2021-12-22 12:01:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:36,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:36,935 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 12:01:36,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619650999] [2021-12-22 12:01:36,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619650999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:36,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:36,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:36,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128467695] [2021-12-22 12:01:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:36,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:36,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:36,939 INFO L87 Difference]: Start difference. First operand 842 states and 1406 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 12:01:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:36,990 INFO L93 Difference]: Finished difference Result 1462 states and 2452 transitions. [2021-12-22 12:01:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-22 12:01:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:36,998 INFO L225 Difference]: With dead ends: 1462 [2021-12-22 12:01:36,998 INFO L226 Difference]: Without dead ends: 1122 [2021-12-22 12:01:37,001 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 12:01:37,011 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 190 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1146 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 12:01:37,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1146 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-22 12:01:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2021-12-22 12:01:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 1.6729222520107239) internal successors, (1872), 1119 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 12:01:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1872 transitions. [2021-12-22 12:01:37,070 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1872 transitions. Word has length 117 [2021-12-22 12:01:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1872 transitions. [2021-12-22 12:01:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 12:01:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1872 transitions. [2021-12-22 12:01:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 12:01:37,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:37,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:37,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:01:37,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2147173936, now seen corresponding path program 1 times [2021-12-22 12:01:37,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506670519] [2021-12-22 12:01:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:37,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:37,171 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 12:01:37,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:37,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506670519] [2021-12-22 12:01:37,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506670519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:37,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:37,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:37,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096134754] [2021-12-22 12:01:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:37,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:37,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:37,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:37,175 INFO L87 Difference]: Start difference. First operand 1120 states and 1872 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 12:01:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:37,291 INFO L93 Difference]: Finished difference Result 2861 states and 4787 transitions. [2021-12-22 12:01:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-22 12:01:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:37,304 INFO L225 Difference]: With dead ends: 2861 [2021-12-22 12:01:37,304 INFO L226 Difference]: Without dead ends: 1950 [2021-12-22 12:01:37,307 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 12:01:37,312 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 183 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1125 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 12:01:37,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-12-22 12:01:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1948. [2021-12-22 12:01:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 1.6656394453004622) internal successors, (3243), 1947 states have internal predecessors, (3243), 0 states have call successors, (0), 0 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 12:01:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3243 transitions. [2021-12-22 12:01:37,413 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3243 transitions. Word has length 117 [2021-12-22 12:01:37,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:37,414 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 3243 transitions. [2021-12-22 12:01:37,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 12:01:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3243 transitions. [2021-12-22 12:01:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 12:01:37,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:37,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:37,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:01:37,420 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash 866565200, now seen corresponding path program 1 times [2021-12-22 12:01:37,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527715548] [2021-12-22 12:01:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:37,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:37,543 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 12:01:37,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:37,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527715548] [2021-12-22 12:01:37,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527715548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:37,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:37,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:37,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998957320] [2021-12-22 12:01:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:37,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:37,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:37,547 INFO L87 Difference]: Start difference. First operand 1948 states and 3243 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 12:01:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:37,690 INFO L93 Difference]: Finished difference Result 3554 states and 5943 transitions. [2021-12-22 12:01:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-22 12:01:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:37,702 INFO L225 Difference]: With dead ends: 3554 [2021-12-22 12:01:37,702 INFO L226 Difference]: Without dead ends: 2643 [2021-12-22 12:01:37,706 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 12:01:37,707 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 184 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1119 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 12:01:37,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1119 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-12-22 12:01:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2641. [2021-12-22 12:01:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 1.665909090909091) internal successors, (4398), 2640 states have internal predecessors, (4398), 0 states have call successors, (0), 0 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 12:01:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4398 transitions. [2021-12-22 12:01:37,903 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4398 transitions. Word has length 120 [2021-12-22 12:01:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:37,903 INFO L470 AbstractCegarLoop]: Abstraction has 2641 states and 4398 transitions. [2021-12-22 12:01:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 12:01:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4398 transitions. [2021-12-22 12:01:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 12:01:37,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:37,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:01:37,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 83170558, now seen corresponding path program 1 times [2021-12-22 12:01:37,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:37,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210847122] [2021-12-22 12:01:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:37,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:38,003 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 12:01:38,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210847122] [2021-12-22 12:01:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210847122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:38,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:38,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687548555] [2021-12-22 12:01:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:38,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:38,007 INFO L87 Difference]: Start difference. First operand 2641 states and 4398 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 12:01:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:38,223 INFO L93 Difference]: Finished difference Result 7226 states and 12005 transitions. [2021-12-22 12:01:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:38,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-22 12:01:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:38,245 INFO L225 Difference]: With dead ends: 7226 [2021-12-22 12:01:38,245 INFO L226 Difference]: Without dead ends: 4812 [2021-12-22 12:01:38,249 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 12:01:38,250 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 177 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1022 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 12:01:38,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1022 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2021-12-22 12:01:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4810. [2021-12-22 12:01:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.651902682470368) internal successors, (7944), 4809 states have internal predecessors, (7944), 0 states have call successors, (0), 0 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 12:01:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 7944 transitions. [2021-12-22 12:01:38,456 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 7944 transitions. Word has length 120 [2021-12-22 12:01:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:38,456 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 7944 transitions. [2021-12-22 12:01:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 12:01:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 7944 transitions. [2021-12-22 12:01:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 12:01:38,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:38,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:38,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:01:38,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:38,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1139352598, now seen corresponding path program 1 times [2021-12-22 12:01:38,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:38,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413472796] [2021-12-22 12:01:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:38,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:38,521 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 12:01:38,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413472796] [2021-12-22 12:01:38,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413472796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:38,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:38,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:01:38,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650080674] [2021-12-22 12:01:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:01:38,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:01:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:01:38,523 INFO L87 Difference]: Start difference. First operand 4810 states and 7944 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 12:01:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:39,726 INFO L93 Difference]: Finished difference Result 29771 states and 49577 transitions. [2021-12-22 12:01:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 12:01:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-22 12:01:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:39,809 INFO L225 Difference]: With dead ends: 29771 [2021-12-22 12:01:39,809 INFO L226 Difference]: Without dead ends: 25188 [2021-12-22 12:01:39,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:01:39,824 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 2298 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:01:39,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 3572 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 12:01:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2021-12-22 12:01:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 9236. [2021-12-22 12:01:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9236 states, 9235 states have (on average 1.6472116946399566) internal successors, (15212), 9235 states have internal predecessors, (15212), 0 states have call successors, (0), 0 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 12:01:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9236 states to 9236 states and 15212 transitions. [2021-12-22 12:01:40,478 INFO L78 Accepts]: Start accepts. Automaton has 9236 states and 15212 transitions. Word has length 123 [2021-12-22 12:01:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:40,478 INFO L470 AbstractCegarLoop]: Abstraction has 9236 states and 15212 transitions. [2021-12-22 12:01:40,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 12:01:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 9236 states and 15212 transitions. [2021-12-22 12:01:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 12:01:40,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:40,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:01:40,480 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 893130139, now seen corresponding path program 1 times [2021-12-22 12:01:40,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:40,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295491578] [2021-12-22 12:01:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:40,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:40,528 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 12:01:40,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295491578] [2021-12-22 12:01:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295491578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:40,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:40,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:01:40,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587159340] [2021-12-22 12:01:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:40,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:01:40,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:01:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:01:40,530 INFO L87 Difference]: Start difference. First operand 9236 states and 15212 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:41,726 INFO L93 Difference]: Finished difference Result 30029 states and 49739 transitions. [2021-12-22 12:01:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:01:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-22 12:01:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:41,768 INFO L225 Difference]: With dead ends: 30029 [2021-12-22 12:01:41,768 INFO L226 Difference]: Without dead ends: 21020 [2021-12-22 12:01:41,783 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 12:01:41,785 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 624 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1716 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 12:01:41,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1716 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21020 states. [2021-12-22 12:01:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21020 to 15091. [2021-12-22 12:01:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15091 states, 15090 states have (on average 1.6485089463220677) internal successors, (24876), 15090 states have internal predecessors, (24876), 0 states have call successors, (0), 0 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 12:01:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15091 states to 15091 states and 24876 transitions. [2021-12-22 12:01:42,698 INFO L78 Accepts]: Start accepts. Automaton has 15091 states and 24876 transitions. Word has length 124 [2021-12-22 12:01:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:42,698 INFO L470 AbstractCegarLoop]: Abstraction has 15091 states and 24876 transitions. [2021-12-22 12:01:42,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 15091 states and 24876 transitions. [2021-12-22 12:01:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 12:01:42,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:42,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:42,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:01:42,700 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash -485089184, now seen corresponding path program 1 times [2021-12-22 12:01:42,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:42,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412495091] [2021-12-22 12:01:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:42,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:42,756 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 12:01:42,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412495091] [2021-12-22 12:01:42,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412495091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:42,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:01:42,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105809524] [2021-12-22 12:01:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:01:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:01:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:01:42,758 INFO L87 Difference]: Start difference. First operand 15091 states and 24876 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:44,162 INFO L93 Difference]: Finished difference Result 28697 states and 47478 transitions. [2021-12-22 12:01:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:01:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-22 12:01:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:44,214 INFO L225 Difference]: With dead ends: 28697 [2021-12-22 12:01:44,215 INFO L226 Difference]: Without dead ends: 20733 [2021-12-22 12:01:44,231 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 12:01:44,232 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 178 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1103 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 12:01:44,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1103 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2021-12-22 12:01:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 20731. [2021-12-22 12:01:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20731 states, 20730 states have (on average 1.645875542691751) internal successors, (34119), 20730 states have internal predecessors, (34119), 0 states have call successors, (0), 0 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 12:01:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20731 states to 20731 states and 34119 transitions. [2021-12-22 12:01:45,648 INFO L78 Accepts]: Start accepts. Automaton has 20731 states and 34119 transitions. Word has length 124 [2021-12-22 12:01:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:45,649 INFO L470 AbstractCegarLoop]: Abstraction has 20731 states and 34119 transitions. [2021-12-22 12:01:45,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:01:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 20731 states and 34119 transitions. [2021-12-22 12:01:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 12:01:45,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:45,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:45,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:01:45,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1854726525, now seen corresponding path program 1 times [2021-12-22 12:01:45,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:45,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824344678] [2021-12-22 12:01:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:45,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:45,744 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 12:01:45,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824344678] [2021-12-22 12:01:45,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824344678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:45,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:45,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:01:45,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024313759] [2021-12-22 12:01:45,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:45,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:01:45,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:45,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:01:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:01:45,748 INFO L87 Difference]: Start difference. First operand 20731 states and 34119 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 12:01:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:48,853 INFO L93 Difference]: Finished difference Result 67429 states and 111258 transitions. [2021-12-22 12:01:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:01:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-22 12:01:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:48,983 INFO L225 Difference]: With dead ends: 67429 [2021-12-22 12:01:48,984 INFO L226 Difference]: Without dead ends: 46943 [2021-12-22 12:01:49,033 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 12:01:49,034 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 622 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1617 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 12:01:49,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1617 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46943 states. [2021-12-22 12:01:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46943 to 33748. [2021-12-22 12:01:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33748 states, 33747 states have (on average 1.6413014490176905) internal successors, (55389), 33747 states have internal predecessors, (55389), 0 states have call successors, (0), 0 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 12:01:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33748 states to 33748 states and 55389 transitions. [2021-12-22 12:01:51,460 INFO L78 Accepts]: Start accepts. Automaton has 33748 states and 55389 transitions. Word has length 125 [2021-12-22 12:01:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:01:51,460 INFO L470 AbstractCegarLoop]: Abstraction has 33748 states and 55389 transitions. [2021-12-22 12:01:51,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 12:01:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33748 states and 55389 transitions. [2021-12-22 12:01:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 12:01:51,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:01:51,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:01:51,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:01:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:01:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1604001442, now seen corresponding path program 1 times [2021-12-22 12:01:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:01:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420634490] [2021-12-22 12:01:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:01:51,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:01:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:01:51,523 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 12:01:51,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:01:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420634490] [2021-12-22 12:01:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420634490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:01:51,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:01:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:01:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281323845] [2021-12-22 12:01:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:01:51,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:01:51,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:01:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:01:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:01:51,525 INFO L87 Difference]: Start difference. First operand 33748 states and 55389 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 12:01:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:01:56,524 INFO L93 Difference]: Finished difference Result 109323 states and 179874 transitions. [2021-12-22 12:01:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:01:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 12:01:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:01:56,728 INFO L225 Difference]: With dead ends: 109323 [2021-12-22 12:01:56,728 INFO L226 Difference]: Without dead ends: 75820 [2021-12-22 12:01:56,788 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 12:01:56,788 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 620 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1658 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 12:01:56,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1658 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:01:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75820 states. [2021-12-22 12:02:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75820 to 54641. [2021-12-22 12:02:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54641 states, 54640 states have (on average 1.6366581259150805) internal successors, (89427), 54640 states have internal predecessors, (89427), 0 states have call successors, (0), 0 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 12:02:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54641 states to 54641 states and 89427 transitions. [2021-12-22 12:02:01,380 INFO L78 Accepts]: Start accepts. Automaton has 54641 states and 89427 transitions. Word has length 126 [2021-12-22 12:02:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:02:01,380 INFO L470 AbstractCegarLoop]: Abstraction has 54641 states and 89427 transitions. [2021-12-22 12:02:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 12:02:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 54641 states and 89427 transitions. [2021-12-22 12:02:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-22 12:02:01,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:02:01,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:01,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:02:01,382 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:02:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:02:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1868950812, now seen corresponding path program 1 times [2021-12-22 12:02:01,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:02:01,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296304387] [2021-12-22 12:02:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:02:01,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:02:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:02:01,448 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 12:02:01,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:02:01,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296304387] [2021-12-22 12:02:01,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296304387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:02:01,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:02:01,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:02:01,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852307196] [2021-12-22 12:02:01,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:02:01,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:02:01,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:02:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:02:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:02:01,450 INFO L87 Difference]: Start difference. First operand 54641 states and 89427 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)