./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label26.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label26.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 4ebd5aed45c5461e176385745bb70c1ebeb4378f3074685fcb814a1b840527ca --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:45:25,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:45:25,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:45:25,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:45:25,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:45:25,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:45:25,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:45:25,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:45:25,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:45:25,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:45:25,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:45:25,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:45:25,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:45:25,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:45:25,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:45:25,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:45:25,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:45:25,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:45:25,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:45:25,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:45:25,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:45:25,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:45:25,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:45:25,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:45:25,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:45:25,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:45:25,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:45:25,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:45:25,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:45:25,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:45:25,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:45:25,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:45:25,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:45:25,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:45:25,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:45:25,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:45:25,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:45:25,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:45:25,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:45:25,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:45:25,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:45:25,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:45:25,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:45:25,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:45:25,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:45:25,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:45:25,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:45:25,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:45:25,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:45:25,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:45:25,962 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:45:25,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:45:25,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:45:25,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:45:25,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:45:25,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:45:25,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:45:25,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:45:25,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:45:25,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:45:25,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:45:25,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:45:25,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:45:25,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:45:25,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:45:25,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:45:25,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:45:25,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:45:25,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:45:25,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:45:25,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:45:25,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ebd5aed45c5461e176385745bb70c1ebeb4378f3074685fcb814a1b840527ca [2021-12-22 09:45:26,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:45:26,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:45:26,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:45:26,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:45:26,254 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:45:26,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2021-12-22 09:45:26,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e436dd6ce/8297322de8c94228ae463d8c71876a01/FLAG0b0e98684 [2021-12-22 09:45:27,104 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:45:27,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2021-12-22 09:45:27,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e436dd6ce/8297322de8c94228ae463d8c71876a01/FLAG0b0e98684 [2021-12-22 09:45:27,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e436dd6ce/8297322de8c94228ae463d8c71876a01 [2021-12-22 09:45:27,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:45:27,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:45:27,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:45:27,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:45:27,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:45:27,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:27" (1/1) ... [2021-12-22 09:45:27,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e927468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:27, skipping insertion in model container [2021-12-22 09:45:27,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:27" (1/1) ... [2021-12-22 09:45:27,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:45:27,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:45:27,760 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/Problem19_label26.c[3735,3748] [2021-12-22 09:45:28,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:45:28,845 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:45:28,873 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/Problem19_label26.c[3735,3748] [2021-12-22 09:45:29,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:45:29,603 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:45:29,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29 WrapperNode [2021-12-22 09:45:29,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:45:29,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:45:29,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:45:29,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:45:29,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:29,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:30,549 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-22 09:45:30,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:45:30,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:45:30,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:45:30,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:45:30,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:30,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:30,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:30,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:31,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:31,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:31,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:31,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:45:31,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:45:31,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:45:31,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:45:31,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (1/1) ... [2021-12-22 09:45:31,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:45:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:45:31,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:45:31,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:45:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:45:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:45:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:45:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:45:31,642 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:45:31,643 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:45:38,331 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:45:38,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:45:38,353 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:45:38,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:38 BoogieIcfgContainer [2021-12-22 09:45:38,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:45:38,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:45:38,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:45:38,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:45:38,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:27" (1/3) ... [2021-12-22 09:45:38,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2571d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:38, skipping insertion in model container [2021-12-22 09:45:38,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:29" (2/3) ... [2021-12-22 09:45:38,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2571d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:38, skipping insertion in model container [2021-12-22 09:45:38,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:38" (3/3) ... [2021-12-22 09:45:38,368 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2021-12-22 09:45:38,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:45:38,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:45:38,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:45:38,441 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:45:38,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:45:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 09:45:38,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:45:38,494 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] [2021-12-22 09:45:38,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:45:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:45:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2021-12-22 09:45:38,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:45:38,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883194911] [2021-12-22 09:45:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:45:38,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:45:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:45:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:45:38,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:45:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883194911] [2021-12-22 09:45:38,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883194911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:45:38,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:45:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:45:38,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607862286] [2021-12-22 09:45:38,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:45:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:45:38,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:45:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:45:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:45:38,757 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:45:45,471 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2021-12-22 09:45:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:45:45,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 09:45:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:45:45,511 INFO L225 Difference]: With dead ends: 4975 [2021-12-22 09:45:45,511 INFO L226 Difference]: Without dead ends: 3163 [2021-12-22 09:45:45,520 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 [2021-12-22 09:45:45,523 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1520 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:45:45,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-22 09:45:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-12-22 09:45:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2021-12-22 09:45:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2021-12-22 09:45:45,673 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 26 [2021-12-22 09:45:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:45:45,674 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2021-12-22 09:45:45,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2021-12-22 09:45:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 09:45:45,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:45:45,680 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:45:45,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:45:45,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:45:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:45:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -326527387, now seen corresponding path program 1 times [2021-12-22 09:45:45,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:45:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167388112] [2021-12-22 09:45:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:45:45,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:45:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:45:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:45:45,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:45:45,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167388112] [2021-12-22 09:45:45,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167388112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:45:45,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:45:45,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:45:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980901482] [2021-12-22 09:45:45,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:45:45,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:45:45,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:45:45,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:45:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:45:45,838 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:45:51,742 INFO L93 Difference]: Finished difference Result 9053 states and 14813 transitions. [2021-12-22 09:45:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:45:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-22 09:45:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:45:51,767 INFO L225 Difference]: With dead ends: 9053 [2021-12-22 09:45:51,767 INFO L226 Difference]: Without dead ends: 5932 [2021-12-22 09:45:51,774 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 [2021-12-22 09:45:51,775 INFO L933 BasicCegarLoop]: 1325 mSDtfsCounter, 1534 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:45:51,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 1544 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 4265 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-22 09:45:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2021-12-22 09:45:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5910. [2021-12-22 09:45:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5909 states have (on average 1.423421898798443) internal successors, (8411), 5909 states have internal predecessors, (8411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 8411 transitions. [2021-12-22 09:45:51,893 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 8411 transitions. Word has length 97 [2021-12-22 09:45:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:45:51,895 INFO L470 AbstractCegarLoop]: Abstraction has 5910 states and 8411 transitions. [2021-12-22 09:45:51,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 8411 transitions. [2021-12-22 09:45:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 09:45:51,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:45:51,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:45:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:45:51,905 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:45:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:45:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -615632586, now seen corresponding path program 1 times [2021-12-22 09:45:51,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:45:51,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049779554] [2021-12-22 09:45:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:45:51,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:45:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:45:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:45:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:45:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049779554] [2021-12-22 09:45:52,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049779554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:45:52,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:45:52,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:45:52,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224533133] [2021-12-22 09:45:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:45:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:45:52,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:45:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:45:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:45:52,058 INFO L87 Difference]: Start difference. First operand 5910 states and 8411 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:45:57,537 INFO L93 Difference]: Finished difference Result 17505 states and 24942 transitions. [2021-12-22 09:45:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:45:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-22 09:45:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:45:57,576 INFO L225 Difference]: With dead ends: 17505 [2021-12-22 09:45:57,576 INFO L226 Difference]: Without dead ends: 11597 [2021-12-22 09:45:57,587 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 [2021-12-22 09:45:57,589 INFO L933 BasicCegarLoop]: 1533 mSDtfsCounter, 1750 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4227 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 5657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:45:57,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 1806 Invalid, 5657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4227 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-22 09:45:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11597 states. [2021-12-22 09:45:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11597 to 11578. [2021-12-22 09:45:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.2801243845555843) internal successors, (14820), 11577 states have internal predecessors, (14820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 14820 transitions. [2021-12-22 09:45:57,779 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 14820 transitions. Word has length 123 [2021-12-22 09:45:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:45:57,781 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 14820 transitions. [2021-12-22 09:45:57,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:45:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 14820 transitions. [2021-12-22 09:45:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 09:45:57,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:45:57,783 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:45:57,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:45:57,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:45:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:45:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2109569826, now seen corresponding path program 1 times [2021-12-22 09:45:57,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:45:57,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232593519] [2021-12-22 09:45:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:45:57,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:45:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:45:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:45:57,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:45:57,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232593519] [2021-12-22 09:45:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232593519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:45:57,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:45:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:45:57,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098554949] [2021-12-22 09:45:57,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:45:57,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:45:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:45:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:45:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:45:57,917 INFO L87 Difference]: Start difference. First operand 11578 states and 14820 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:46:04,355 INFO L93 Difference]: Finished difference Result 34273 states and 43832 transitions. [2021-12-22 09:46:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:46:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-22 09:46:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:46:04,406 INFO L225 Difference]: With dead ends: 34273 [2021-12-22 09:46:04,406 INFO L226 Difference]: Without dead ends: 22697 [2021-12-22 09:46:04,423 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 [2021-12-22 09:46:04,424 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 2497 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:46:04,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 995 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-22 09:46:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22697 states. [2021-12-22 09:46:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22697 to 22694. [2021-12-22 09:46:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 1.238663905168995) internal successors, (28109), 22693 states have internal predecessors, (28109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 28109 transitions. [2021-12-22 09:46:04,818 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 28109 transitions. Word has length 131 [2021-12-22 09:46:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:46:04,819 INFO L470 AbstractCegarLoop]: Abstraction has 22694 states and 28109 transitions. [2021-12-22 09:46:04,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 28109 transitions. [2021-12-22 09:46:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-22 09:46:04,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:46:04,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2021-12-22 09:46:04,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:46:04,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:46:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:46:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash -426229204, now seen corresponding path program 1 times [2021-12-22 09:46:04,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:46:04,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393442244] [2021-12-22 09:46:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:46:04,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:46:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:46:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 09:46:05,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:46:05,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393442244] [2021-12-22 09:46:05,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393442244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:46:05,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:46:05,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:46:05,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777477933] [2021-12-22 09:46:05,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:46:05,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:46:05,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:46:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:46:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:46:05,129 INFO L87 Difference]: Start difference. First operand 22694 states and 28109 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:46:14,015 INFO L93 Difference]: Finished difference Result 57752 states and 69837 transitions. [2021-12-22 09:46:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:46:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 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 393 [2021-12-22 09:46:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:46:14,081 INFO L225 Difference]: With dead ends: 57752 [2021-12-22 09:46:14,081 INFO L226 Difference]: Without dead ends: 35060 [2021-12-22 09:46:14,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:46:14,111 INFO L933 BasicCegarLoop]: 1805 mSDtfsCounter, 3755 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 9454 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 9699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 9454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:46:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2160 Invalid, 9699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 9454 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-12-22 09:46:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35060 states. [2021-12-22 09:46:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35060 to 32288. [2021-12-22 09:46:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32288 states, 32287 states have (on average 1.1912844178771642) internal successors, (38463), 32287 states have internal predecessors, (38463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32288 states to 32288 states and 38463 transitions. [2021-12-22 09:46:14,574 INFO L78 Accepts]: Start accepts. Automaton has 32288 states and 38463 transitions. Word has length 393 [2021-12-22 09:46:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:46:14,576 INFO L470 AbstractCegarLoop]: Abstraction has 32288 states and 38463 transitions. [2021-12-22 09:46:14,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32288 states and 38463 transitions. [2021-12-22 09:46:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-22 09:46:14,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:46:14,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2021-12-22 09:46:14,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:46:14,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:46:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:46:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -513854842, now seen corresponding path program 1 times [2021-12-22 09:46:14,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:46:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065490118] [2021-12-22 09:46:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:46:14,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:46:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:46:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:46:14,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:46:14,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065490118] [2021-12-22 09:46:14,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065490118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:46:14,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:46:14,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:46:14,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481573007] [2021-12-22 09:46:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:46:14,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:46:14,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:46:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:46:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:46:14,836 INFO L87 Difference]: Start difference. First operand 32288 states and 38463 transitions. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:46:20,530 INFO L93 Difference]: Finished difference Result 67335 states and 79703 transitions. [2021-12-22 09:46:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:46:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 421 [2021-12-22 09:46:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:46:20,592 INFO L225 Difference]: With dead ends: 67335 [2021-12-22 09:46:20,593 INFO L226 Difference]: Without dead ends: 35018 [2021-12-22 09:46:20,617 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 [2021-12-22 09:46:20,619 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:46:20,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1955 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 09:46:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35018 states. [2021-12-22 09:46:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35018 to 35018. [2021-12-22 09:46:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35018 states, 35017 states have (on average 1.1765142645000999) internal successors, (41198), 35017 states have internal predecessors, (41198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)