./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label07.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 a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:26:07,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:26:07,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:26:07,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:26:07,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:26:07,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:26:07,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:26:07,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:26:08,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:26:08,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:26:08,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:26:08,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:26:08,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:26:08,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:26:08,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:26:08,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:26:08,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:26:08,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:26:08,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:26:08,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:26:08,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:26:08,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:26:08,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:26:08,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:26:08,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:26:08,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:26:08,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:26:08,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:26:08,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:26:08,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:26:08,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:26:08,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:26:08,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:26:08,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:26:08,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:26:08,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:26:08,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:26:08,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:26:08,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:26:08,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:26:08,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:26:08,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:26:08,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:26:08,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:26:08,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:26:08,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:26:08,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:26:08,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:26:08,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:26:08,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:26:08,068 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:26:08,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:26:08,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:26:08,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:26:08,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:26:08,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:26:08,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:26:08,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:26:08,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:26:08,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:26:08,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:26:08,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:26:08,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:26:08,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:26:08,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:26:08,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:26:08,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:26:08,073 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:26:08,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:26:08,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:26:08,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:26:08,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 [2021-12-21 10:26:08,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:26:08,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:26:08,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:26:08,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:26:08,311 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:26:08,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2021-12-21 10:26:08,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47831bc26/fbf11f05df8048348a3ea2cffa83890c/FLAG2d0403d3f [2021-12-21 10:26:08,887 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:26:08,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2021-12-21 10:26:08,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47831bc26/fbf11f05df8048348a3ea2cffa83890c/FLAG2d0403d3f [2021-12-21 10:26:09,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47831bc26/fbf11f05df8048348a3ea2cffa83890c [2021-12-21 10:26:09,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:26:09,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:26:09,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:26:09,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:26:09,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:26:09,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:09" (1/1) ... [2021-12-21 10:26:09,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53058c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:09, skipping insertion in model container [2021-12-21 10:26:09,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:09" (1/1) ... [2021-12-21 10:26:09,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:26:09,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:26:09,793 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/eca-rers2012/Problem03_label07.c[57439,57452] [2021-12-21 10:26:09,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:26:09,831 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:26:10,034 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/eca-rers2012/Problem03_label07.c[57439,57452] [2021-12-21 10:26:10,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:26:10,061 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:26:10,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10 WrapperNode [2021-12-21 10:26:10,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:26:10,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:26:10,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:26:10,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:26:10,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,180 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-21 10:26:10,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:26:10,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:26:10,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:26:10,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:26:10,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:26:10,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:26:10,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:26:10,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:26:10,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (1/1) ... [2021-12-21 10:26:10,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:26:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:10,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:26:10,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:26:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:26:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:26:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:26:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:26:10,452 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:26:10,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:26:11,796 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:26:11,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:26:11,810 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:26:11,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:11 BoogieIcfgContainer [2021-12-21 10:26:11,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:26:11,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:26:11,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:26:11,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:26:11,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:26:09" (1/3) ... [2021-12-21 10:26:11,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f813945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:11, skipping insertion in model container [2021-12-21 10:26:11,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:10" (2/3) ... [2021-12-21 10:26:11,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f813945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:11, skipping insertion in model container [2021-12-21 10:26:11,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:11" (3/3) ... [2021-12-21 10:26:11,820 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2021-12-21 10:26:11,824 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:26:11,824 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:26:11,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:26:11,875 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:26:11,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:26:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-21 10:26:11,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:11,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:11,905 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash -58959822, now seen corresponding path program 1 times [2021-12-21 10:26:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244067667] [2021-12-21 10:26:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:11,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:12,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244067667] [2021-12-21 10:26:12,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244067667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:12,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:12,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:12,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917594853] [2021-12-21 10:26:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:12,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:12,364 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:13,213 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-12-21 10:26:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-12-21 10:26:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:13,247 INFO L225 Difference]: With dead ends: 864 [2021-12-21 10:26:13,247 INFO L226 Difference]: Without dead ends: 468 [2021-12-21 10:26:13,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:13,253 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:13,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:26:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-21 10:26:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-12-21 10:26:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-12-21 10:26:13,301 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 172 [2021-12-21 10:26:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:13,302 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-12-21 10:26:13,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-12-21 10:26:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-21 10:26:13,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:13,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:13,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:26:13,306 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -612505342, now seen corresponding path program 1 times [2021-12-21 10:26:13,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:13,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116702006] [2021-12-21 10:26:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:13,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:13,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116702006] [2021-12-21 10:26:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116702006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:13,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:13,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756402782] [2021-12-21 10:26:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:13,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:13,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:13,401 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:14,177 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2021-12-21 10:26:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-21 10:26:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:14,181 INFO L225 Difference]: With dead ends: 1330 [2021-12-21 10:26:14,181 INFO L226 Difference]: Without dead ends: 878 [2021-12-21 10:26:14,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:14,183 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:14,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-21 10:26:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2021-12-21 10:26:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2021-12-21 10:26:14,212 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 177 [2021-12-21 10:26:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:14,213 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2021-12-21 10:26:14,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2021-12-21 10:26:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-21 10:26:14,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:14,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:14,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:26:14,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1500805969, now seen corresponding path program 1 times [2021-12-21 10:26:14,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943265988] [2021-12-21 10:26:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:14,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:14,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943265988] [2021-12-21 10:26:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943265988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:14,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:14,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:14,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779870729] [2021-12-21 10:26:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:14,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:14,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:14,294 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:14,988 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2021-12-21 10:26:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-12-21 10:26:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:14,998 INFO L225 Difference]: With dead ends: 2575 [2021-12-21 10:26:14,998 INFO L226 Difference]: Without dead ends: 1703 [2021-12-21 10:26:14,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:15,001 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:15,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-21 10:26:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2021-12-21 10:26:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4994068801897984) internal successors, (2528), 1686 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2528 transitions. [2021-12-21 10:26:15,034 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2528 transitions. Word has length 180 [2021-12-21 10:26:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:15,034 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 2528 transitions. [2021-12-21 10:26:15,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2528 transitions. [2021-12-21 10:26:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-21 10:26:15,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:15,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:15,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:26:15,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2063767796, now seen corresponding path program 1 times [2021-12-21 10:26:15,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:15,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923758972] [2021-12-21 10:26:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:15,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:26:15,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:15,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923758972] [2021-12-21 10:26:15,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923758972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:15,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:15,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:15,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622819784] [2021-12-21 10:26:15,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:15,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:15,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:15,128 INFO L87 Difference]: Start difference. First operand 1687 states and 2528 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:15,808 INFO L93 Difference]: Finished difference Result 4194 states and 6266 transitions. [2021-12-21 10:26:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:15,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-12-21 10:26:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:15,817 INFO L225 Difference]: With dead ends: 4194 [2021-12-21 10:26:15,818 INFO L226 Difference]: Without dead ends: 2509 [2021-12-21 10:26:15,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:15,821 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:15,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 113 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:26:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-12-21 10:26:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2021-12-21 10:26:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4670921420023932) internal successors, (3678), 2507 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3678 transitions. [2021-12-21 10:26:15,862 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3678 transitions. Word has length 182 [2021-12-21 10:26:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:15,862 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3678 transitions. [2021-12-21 10:26:15,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3678 transitions. [2021-12-21 10:26:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-21 10:26:15,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:15,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:15,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:26:15,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash 158556796, now seen corresponding path program 1 times [2021-12-21 10:26:15,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644558320] [2021-12-21 10:26:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:15,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:16,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644558320] [2021-12-21 10:26:16,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644558320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:16,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:16,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:16,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635508809] [2021-12-21 10:26:16,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:16,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:16,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:16,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:16,007 INFO L87 Difference]: Start difference. First operand 2508 states and 3678 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:16,649 INFO L93 Difference]: Finished difference Result 5011 states and 7350 transitions. [2021-12-21 10:26:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:16,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-21 10:26:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:16,659 INFO L225 Difference]: With dead ends: 5011 [2021-12-21 10:26:16,659 INFO L226 Difference]: Without dead ends: 2505 [2021-12-21 10:26:16,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:16,665 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 106 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:16,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 386 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:26:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-12-21 10:26:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2096. [2021-12-21 10:26:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 1.3761336515513127) internal successors, (2883), 2095 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2883 transitions. [2021-12-21 10:26:16,702 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2883 transitions. Word has length 187 [2021-12-21 10:26:16,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:16,703 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 2883 transitions. [2021-12-21 10:26:16,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2883 transitions. [2021-12-21 10:26:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-21 10:26:16,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:16,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:26:16,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash 819933047, now seen corresponding path program 1 times [2021-12-21 10:26:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797300639] [2021-12-21 10:26:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:16,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:16,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797300639] [2021-12-21 10:26:16,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797300639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:16,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761911360] [2021-12-21 10:26:16,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:16,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:16,789 INFO L87 Difference]: Start difference. First operand 2096 states and 2883 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:17,503 INFO L93 Difference]: Finished difference Result 6220 states and 8560 transitions. [2021-12-21 10:26:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 189 [2021-12-21 10:26:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:17,517 INFO L225 Difference]: With dead ends: 6220 [2021-12-21 10:26:17,517 INFO L226 Difference]: Without dead ends: 4126 [2021-12-21 10:26:17,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:17,521 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 205 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:17,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 199 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-12-21 10:26:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4126. [2021-12-21 10:26:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4126 states, 4125 states have (on average 1.2334545454545454) internal successors, (5088), 4125 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 5088 transitions. [2021-12-21 10:26:17,581 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 5088 transitions. Word has length 189 [2021-12-21 10:26:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:17,582 INFO L470 AbstractCegarLoop]: Abstraction has 4126 states and 5088 transitions. [2021-12-21 10:26:17,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 5088 transitions. [2021-12-21 10:26:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-21 10:26:17,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:17,589 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:26:17,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -975872118, now seen corresponding path program 1 times [2021-12-21 10:26:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062428123] [2021-12-21 10:26:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:17,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:17,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062428123] [2021-12-21 10:26:17,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062428123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:17,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:17,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064281666] [2021-12-21 10:26:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:17,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:17,657 INFO L87 Difference]: Start difference. First operand 4126 states and 5088 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:18,365 INFO L93 Difference]: Finished difference Result 10294 states and 12765 transitions. [2021-12-21 10:26:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 193 [2021-12-21 10:26:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:18,388 INFO L225 Difference]: With dead ends: 10294 [2021-12-21 10:26:18,389 INFO L226 Difference]: Without dead ends: 6170 [2021-12-21 10:26:18,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:18,395 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:18,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 359 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2021-12-21 10:26:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 6166. [2021-12-21 10:26:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6166 states, 6165 states have (on average 1.2047039740470398) internal successors, (7427), 6165 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 7427 transitions. [2021-12-21 10:26:18,499 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 7427 transitions. Word has length 193 [2021-12-21 10:26:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 6166 states and 7427 transitions. [2021-12-21 10:26:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 7427 transitions. [2021-12-21 10:26:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-21 10:26:18,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:18,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:26:18,509 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1218419532, now seen corresponding path program 1 times [2021-12-21 10:26:18,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:18,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696551976] [2021-12-21 10:26:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:18,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:26:18,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:18,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696551976] [2021-12-21 10:26:18,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696551976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:18,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:18,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:18,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313451247] [2021-12-21 10:26:18,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:18,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:18,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:18,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:18,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:18,604 INFO L87 Difference]: Start difference. First operand 6166 states and 7427 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:18,902 INFO L93 Difference]: Finished difference Result 18464 states and 22238 transitions. [2021-12-21 10:26:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 201 [2021-12-21 10:26:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:18,955 INFO L225 Difference]: With dead ends: 18464 [2021-12-21 10:26:18,955 INFO L226 Difference]: Without dead ends: 12300 [2021-12-21 10:26:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:18,967 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 353 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:18,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 544 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:26:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-12-21 10:26:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 12298. [2021-12-21 10:26:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12298 states, 12297 states have (on average 1.2033829389281938) internal successors, (14798), 12297 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 14798 transitions. [2021-12-21 10:26:19,176 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 14798 transitions. Word has length 201 [2021-12-21 10:26:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:19,179 INFO L470 AbstractCegarLoop]: Abstraction has 12298 states and 14798 transitions. [2021-12-21 10:26:19,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 14798 transitions. [2021-12-21 10:26:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-21 10:26:19,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:19,194 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:19,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:26:19,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1645874258, now seen corresponding path program 1 times [2021-12-21 10:26:19,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:19,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221451823] [2021-12-21 10:26:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:19,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 10:26:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221451823] [2021-12-21 10:26:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221451823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:19,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:19,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:19,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382516198] [2021-12-21 10:26:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:19,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:19,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:19,293 INFO L87 Difference]: Start difference. First operand 12298 states and 14798 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:20,056 INFO L93 Difference]: Finished difference Result 31097 states and 38149 transitions. [2021-12-21 10:26:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 202 [2021-12-21 10:26:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:20,102 INFO L225 Difference]: With dead ends: 31097 [2021-12-21 10:26:20,103 INFO L226 Difference]: Without dead ends: 18801 [2021-12-21 10:26:20,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:20,123 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:20,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 402 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2021-12-21 10:26:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 18187. [2021-12-21 10:26:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18187 states, 18186 states have (on average 1.1702408446057406) internal successors, (21282), 18186 states have internal predecessors, (21282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18187 states to 18187 states and 21282 transitions. [2021-12-21 10:26:20,421 INFO L78 Accepts]: Start accepts. Automaton has 18187 states and 21282 transitions. Word has length 202 [2021-12-21 10:26:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:20,422 INFO L470 AbstractCegarLoop]: Abstraction has 18187 states and 21282 transitions. [2021-12-21 10:26:20,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18187 states and 21282 transitions. [2021-12-21 10:26:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 10:26:20,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:20,442 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:20,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:26:20,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -957763539, now seen corresponding path program 1 times [2021-12-21 10:26:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682027722] [2021-12-21 10:26:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:20,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:26:20,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682027722] [2021-12-21 10:26:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682027722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:20,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:20,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:26:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742234372] [2021-12-21 10:26:20,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:20,572 INFO L87 Difference]: Start difference. First operand 18187 states and 21282 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:21,433 INFO L93 Difference]: Finished difference Result 50029 states and 58829 transitions. [2021-12-21 10:26:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:21,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-12-21 10:26:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:21,491 INFO L225 Difference]: With dead ends: 50029 [2021-12-21 10:26:21,491 INFO L226 Difference]: Without dead ends: 31844 [2021-12-21 10:26:21,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:26:21,511 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 216 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:21,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 198 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31844 states. [2021-12-21 10:26:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31844 to 31020. [2021-12-21 10:26:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31020 states, 31019 states have (on average 1.1656081756342886) internal successors, (36156), 31019 states have internal predecessors, (36156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31020 states to 31020 states and 36156 transitions. [2021-12-21 10:26:21,998 INFO L78 Accepts]: Start accepts. Automaton has 31020 states and 36156 transitions. Word has length 212 [2021-12-21 10:26:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:21,998 INFO L470 AbstractCegarLoop]: Abstraction has 31020 states and 36156 transitions. [2021-12-21 10:26:21,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31020 states and 36156 transitions. [2021-12-21 10:26:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 10:26:22,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:22,027 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:22,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:26:22,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1870613808, now seen corresponding path program 1 times [2021-12-21 10:26:22,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:22,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282761492] [2021-12-21 10:26:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:22,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:26:22,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282761492] [2021-12-21 10:26:22,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282761492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389712240] [2021-12-21 10:26:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:22,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:22,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:22,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:26:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:26:22,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:22,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389712240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:22,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:22,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789852477] [2021-12-21 10:26:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:22,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:22,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:22,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:22,873 INFO L87 Difference]: Start difference. First operand 31020 states and 36156 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:23,830 INFO L93 Difference]: Finished difference Result 82985 states and 96970 transitions. [2021-12-21 10:26:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 220 [2021-12-21 10:26:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:23,931 INFO L225 Difference]: With dead ends: 82985 [2021-12-21 10:26:23,931 INFO L226 Difference]: Without dead ends: 51967 [2021-12-21 10:26:23,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:23,977 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 92 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:23,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 215 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51967 states. [2021-12-21 10:26:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51967 to 50745. [2021-12-21 10:26:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50745 states, 50744 states have (on average 1.1506779126596247) internal successors, (58390), 50744 states have internal predecessors, (58390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50745 states to 50745 states and 58390 transitions. [2021-12-21 10:26:24,808 INFO L78 Accepts]: Start accepts. Automaton has 50745 states and 58390 transitions. Word has length 220 [2021-12-21 10:26:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:24,809 INFO L470 AbstractCegarLoop]: Abstraction has 50745 states and 58390 transitions. [2021-12-21 10:26:24,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 50745 states and 58390 transitions. [2021-12-21 10:26:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-21 10:26:24,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:24,865 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:24,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:25,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:26:25,090 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1916304460, now seen corresponding path program 1 times [2021-12-21 10:26:25,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:25,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93077314] [2021-12-21 10:26:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:25,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 10:26:25,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93077314] [2021-12-21 10:26:25,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93077314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578400038] [2021-12-21 10:26:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:25,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:25,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:25,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:26:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 10:26:25,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578400038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:25,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:25,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:25,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364968298] [2021-12-21 10:26:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:25,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:25,838 INFO L87 Difference]: Start difference. First operand 50745 states and 58390 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:26,554 INFO L93 Difference]: Finished difference Result 141991 states and 163633 transitions. [2021-12-21 10:26:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 243 [2021-12-21 10:26:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:26,716 INFO L225 Difference]: With dead ends: 141991 [2021-12-21 10:26:26,717 INFO L226 Difference]: Without dead ends: 91654 [2021-12-21 10:26:26,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:26,764 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:26,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 848 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:26:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91654 states. [2021-12-21 10:26:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91654 to 91652. [2021-12-21 10:26:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91652 states, 91651 states have (on average 1.1366488090691864) internal successors, (104175), 91651 states have internal predecessors, (104175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91652 states to 91652 states and 104175 transitions. [2021-12-21 10:26:27,898 INFO L78 Accepts]: Start accepts. Automaton has 91652 states and 104175 transitions. Word has length 243 [2021-12-21 10:26:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:27,899 INFO L470 AbstractCegarLoop]: Abstraction has 91652 states and 104175 transitions. [2021-12-21 10:26:27,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 91652 states and 104175 transitions. [2021-12-21 10:26:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-21 10:26:27,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:27,951 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:27,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:26:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 10:26:28,167 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash -206882489, now seen corresponding path program 1 times [2021-12-21 10:26:28,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943949961] [2021-12-21 10:26:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:28,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-21 10:26:28,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943949961] [2021-12-21 10:26:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943949961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594491495] [2021-12-21 10:26:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:28,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:28,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:28,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:26:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 10:26:28,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:28,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594491495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:28,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:28,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:28,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472807984] [2021-12-21 10:26:28,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:28,847 INFO L87 Difference]: Start difference. First operand 91652 states and 104175 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:30,404 INFO L93 Difference]: Finished difference Result 178314 states and 202462 transitions. [2021-12-21 10:26:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-12-21 10:26:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:30,527 INFO L225 Difference]: With dead ends: 178314 [2021-12-21 10:26:30,527 INFO L226 Difference]: Without dead ends: 86867 [2021-12-21 10:26:30,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:30,572 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 212 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:30,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 357 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:26:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86867 states. [2021-12-21 10:26:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86867 to 86780. [2021-12-21 10:26:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86780 states, 86779 states have (on average 1.1255833784671407) internal successors, (97677), 86779 states have internal predecessors, (97677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86780 states to 86780 states and 97677 transitions. [2021-12-21 10:26:31,933 INFO L78 Accepts]: Start accepts. Automaton has 86780 states and 97677 transitions. Word has length 272 [2021-12-21 10:26:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:31,933 INFO L470 AbstractCegarLoop]: Abstraction has 86780 states and 97677 transitions. [2021-12-21 10:26:31,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 86780 states and 97677 transitions. [2021-12-21 10:26:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-21 10:26:32,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:32,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:32,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:32,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:32,228 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2061083146, now seen corresponding path program 1 times [2021-12-21 10:26:32,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:32,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600462634] [2021-12-21 10:26:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:32,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 10:26:32,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600462634] [2021-12-21 10:26:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600462634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142476986] [2021-12-21 10:26:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:32,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:32,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:32,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:26:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:26:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-21 10:26:32,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142476986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:32,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:32,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:26:32,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279221887] [2021-12-21 10:26:32,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:32,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:32,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:32,922 INFO L87 Difference]: Start difference. First operand 86780 states and 97677 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:33,995 INFO L93 Difference]: Finished difference Result 182906 states and 207172 transitions. [2021-12-21 10:26:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:33,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 284 [2021-12-21 10:26:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:34,111 INFO L225 Difference]: With dead ends: 182906 [2021-12-21 10:26:34,111 INFO L226 Difference]: Without dead ends: 96534 [2021-12-21 10:26:34,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:26:34,158 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 343 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:26:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96534 states. [2021-12-21 10:26:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96534 to 94088. [2021-12-21 10:26:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94088 states, 94087 states have (on average 1.1299754482553381) internal successors, (106316), 94087 states have internal predecessors, (106316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94088 states to 94088 states and 106316 transitions. [2021-12-21 10:26:35,548 INFO L78 Accepts]: Start accepts. Automaton has 94088 states and 106316 transitions. Word has length 284 [2021-12-21 10:26:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:35,549 INFO L470 AbstractCegarLoop]: Abstraction has 94088 states and 106316 transitions. [2021-12-21 10:26:35,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 94088 states and 106316 transitions. [2021-12-21 10:26:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-21 10:26:35,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:35,646 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:35,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:35,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:35,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:35,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1720424733, now seen corresponding path program 1 times [2021-12-21 10:26:35,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:35,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051023753] [2021-12-21 10:26:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:35,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 10:26:35,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:35,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051023753] [2021-12-21 10:26:35,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051023753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:35,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277039556] [2021-12-21 10:26:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:35,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:35,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:35,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:26:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:36,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:26:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 215 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:26:36,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:26:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 215 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:26:37,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277039556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:26:37,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:26:37,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-12-21 10:26:37,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867170580] [2021-12-21 10:26:37,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:26:37,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:26:37,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:26:37,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:26:37,087 INFO L87 Difference]: Start difference. First operand 94088 states and 106316 transitions. Second operand has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:41,184 INFO L93 Difference]: Finished difference Result 313064 states and 352091 transitions. [2021-12-21 10:26:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:26:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 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 310 [2021-12-21 10:26:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:41,469 INFO L225 Difference]: With dead ends: 313064 [2021-12-21 10:26:41,469 INFO L226 Difference]: Without dead ends: 219384 [2021-12-21 10:26:41,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:26:41,514 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 2777 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2777 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 4682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2777 Valid, 405 Invalid, 4682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 10:26:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219384 states. [2021-12-21 10:26:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219384 to 210963. [2021-12-21 10:26:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210963 states, 210962 states have (on average 1.098249921786862) internal successors, (231689), 210962 states have internal predecessors, (231689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210963 states to 210963 states and 231689 transitions. [2021-12-21 10:26:44,843 INFO L78 Accepts]: Start accepts. Automaton has 210963 states and 231689 transitions. Word has length 310 [2021-12-21 10:26:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:44,845 INFO L470 AbstractCegarLoop]: Abstraction has 210963 states and 231689 transitions. [2021-12-21 10:26:44,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 210963 states and 231689 transitions. [2021-12-21 10:26:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-21 10:26:44,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:44,988 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:45,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 10:26:45,189 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -626986888, now seen corresponding path program 1 times [2021-12-21 10:26:45,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190306460] [2021-12-21 10:26:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:45,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 10:26:45,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190306460] [2021-12-21 10:26:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190306460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:45,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:26:45,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:26:45,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471526285] [2021-12-21 10:26:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:45,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:26:45,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:26:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:26:45,300 INFO L87 Difference]: Start difference. First operand 210963 states and 231689 transitions. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:47,549 INFO L93 Difference]: Finished difference Result 446514 states and 490927 transitions. [2021-12-21 10:26:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:26:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 313 [2021-12-21 10:26:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:47,864 INFO L225 Difference]: With dead ends: 446514 [2021-12-21 10:26:47,864 INFO L226 Difference]: Without dead ends: 236162 [2021-12-21 10:26:47,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:26:47,954 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 362 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:47,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 155 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:26:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236162 states. [2021-12-21 10:26:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236162 to 224269. [2021-12-21 10:26:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224269 states, 224268 states have (on average 1.0985249790429308) internal successors, (246364), 224268 states have internal predecessors, (246364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224269 states to 224269 states and 246364 transitions. [2021-12-21 10:26:51,699 INFO L78 Accepts]: Start accepts. Automaton has 224269 states and 246364 transitions. Word has length 313 [2021-12-21 10:26:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:51,700 INFO L470 AbstractCegarLoop]: Abstraction has 224269 states and 246364 transitions. [2021-12-21 10:26:51,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 224269 states and 246364 transitions. [2021-12-21 10:26:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-21 10:26:51,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:51,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:51,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:26:51,821 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1742213714, now seen corresponding path program 1 times [2021-12-21 10:26:51,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:51,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041042117] [2021-12-21 10:26:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:51,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:26:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 151 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:26:51,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:26:51,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041042117] [2021-12-21 10:26:51,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041042117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:26:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345499730] [2021-12-21 10:26:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:51,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:26:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:26:51,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:26:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:26:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:26:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:26:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:26:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:26:52,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:26:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345499730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:26:52,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:26:52,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-21 10:26:52,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459306803] [2021-12-21 10:26:52,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:26:52,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:26:52,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:26:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:26:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:26:52,860 INFO L87 Difference]: Start difference. First operand 224269 states and 246364 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:26:54,688 INFO L93 Difference]: Finished difference Result 508543 states and 558770 transitions. [2021-12-21 10:26:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:26:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 326 [2021-12-21 10:26:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:26:55,498 INFO L225 Difference]: With dead ends: 508543 [2021-12-21 10:26:55,499 INFO L226 Difference]: Without dead ends: 284885 [2021-12-21 10:26:55,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:26:55,732 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 114 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:26:55,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 211 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:26:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284885 states. [2021-12-21 10:26:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284885 to 269648. [2021-12-21 10:26:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269648 states, 269647 states have (on average 1.1016032071560224) internal successors, (297044), 269647 states have internal predecessors, (297044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269648 states to 269648 states and 297044 transitions. [2021-12-21 10:26:59,702 INFO L78 Accepts]: Start accepts. Automaton has 269648 states and 297044 transitions. Word has length 326 [2021-12-21 10:26:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:26:59,702 INFO L470 AbstractCegarLoop]: Abstraction has 269648 states and 297044 transitions. [2021-12-21 10:26:59,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:26:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 269648 states and 297044 transitions. [2021-12-21 10:26:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-21 10:26:59,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:26:59,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:26:59,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:26:59,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 10:26:59,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:26:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:26:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash -521126020, now seen corresponding path program 1 times [2021-12-21 10:26:59,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:26:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856373526] [2021-12-21 10:26:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:26:59,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:27:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:27:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-21 10:27:00,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:27:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856373526] [2021-12-21 10:27:00,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856373526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:27:00,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:27:00,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:27:00,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991181645] [2021-12-21 10:27:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:27:00,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:27:00,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:27:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:27:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:27:00,094 INFO L87 Difference]: Start difference. First operand 269648 states and 297044 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)