./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87c0d05d6e0355591807918f29d7510d5603d16064875313848d28b6b97f865e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 16:12:56,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 16:12:56,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 16:12:56,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 16:12:56,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 16:12:56,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 16:12:56,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 16:12:56,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 16:12:56,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 16:12:56,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 16:12:56,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 16:12:56,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 16:12:56,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 16:12:56,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 16:12:56,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 16:12:56,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 16:12:56,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 16:12:56,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 16:12:56,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 16:12:56,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 16:12:56,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 16:12:56,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 16:12:56,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 16:12:56,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 16:12:56,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 16:12:56,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 16:12:56,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 16:12:56,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 16:12:56,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 16:12:56,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 16:12:56,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 16:12:56,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 16:12:56,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 16:12:56,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 16:12:56,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 16:12:56,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 16:12:56,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 16:12:56,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 16:12:56,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 16:12:56,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 16:12:56,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 16:12:56,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 16:12:56,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 16:12:56,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 16:12:56,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 16:12:56,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 16:12:56,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 16:12:56,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 16:12:56,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 16:12:56,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 16:12:56,965 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 16:12:56,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 16:12:56,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 16:12:56,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 16:12:56,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 16:12:56,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 16:12:56,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 16:12:56,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 16:12:56,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 16:12:56,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 16:12:56,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 16:12:56,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 16:12:56,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 16:12:56,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 16:12:56,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 16:12:56,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 16:12:56,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:12:56,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 16:12:56,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 16:12:56,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 16:12:56,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 16:12:56,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 16:12:56,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 16:12:56,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 16:12:56,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 16:12:56,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 16:12:56,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87c0d05d6e0355591807918f29d7510d5603d16064875313848d28b6b97f865e [2021-12-17 16:12:57,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 16:12:57,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 16:12:57,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 16:12:57,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 16:12:57,212 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 16:12:57,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-17 16:12:57,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c703d0665/dc2877001aa4408e9acdb5af72305447/FLAG63781f236 [2021-12-17 16:12:57,631 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 16:12:57,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-17 16:12:57,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c703d0665/dc2877001aa4408e9acdb5af72305447/FLAG63781f236 [2021-12-17 16:12:57,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c703d0665/dc2877001aa4408e9acdb5af72305447 [2021-12-17 16:12:57,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 16:12:57,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 16:12:57,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 16:12:57,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 16:12:57,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 16:12:57,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:12:57" (1/1) ... [2021-12-17 16:12:57,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40590404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:57, skipping insertion in model container [2021-12-17 16:12:57,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:12:57" (1/1) ... [2021-12-17 16:12:57,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 16:12:57,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 16:12:57,885 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5337,5350] [2021-12-17 16:12:57,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:12:57,926 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 16:12:57,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5337,5350] [2021-12-17 16:12:57,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:12:58,002 INFO L208 MainTranslator]: Completed translation [2021-12-17 16:12:58,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58 WrapperNode [2021-12-17 16:12:58,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 16:12:58,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 16:12:58,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 16:12:58,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 16:12:58,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,041 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 426 [2021-12-17 16:12:58,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 16:12:58,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 16:12:58,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 16:12:58,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 16:12:58,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 16:12:58,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 16:12:58,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 16:12:58,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 16:12:58,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (1/1) ... [2021-12-17 16:12:58,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:12:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:12:58,123 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) [2021-12-17 16:12:58,159 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 [2021-12-17 16:12:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 16:12:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 16:12:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 16:12:58,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 16:12:58,311 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 16:12:58,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 16:12:58,705 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 16:12:58,711 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 16:12:58,712 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 16:12:58,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:12:58 BoogieIcfgContainer [2021-12-17 16:12:58,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 16:12:58,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 16:12:58,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 16:12:58,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 16:12:58,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:12:57" (1/3) ... [2021-12-17 16:12:58,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e82367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:12:58, skipping insertion in model container [2021-12-17 16:12:58,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:12:58" (2/3) ... [2021-12-17 16:12:58,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e82367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:12:58, skipping insertion in model container [2021-12-17 16:12:58,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:12:58" (3/3) ... [2021-12-17 16:12:58,722 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-17 16:12:58,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 16:12:58,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 16:12:58,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 16:12:58,758 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 [2021-12-17 16:12:58,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 16:12:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 states have internal predecessors, (183), 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) [2021-12-17 16:12:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 16:12:58,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:58,772 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] [2021-12-17 16:12:58,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2021-12-17 16:12:58,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453097588] [2021-12-17 16:12:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:58,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453097588] [2021-12-17 16:12:59,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453097588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104874391] [2021-12-17 16:12:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:59,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:59,027 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 states have internal predecessors, (183), 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 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-12-17 16:12:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:59,080 INFO L93 Difference]: Finished difference Result 260 states and 419 transitions. [2021-12-17 16:12:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2021-12-17 16:12:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:59,088 INFO L225 Difference]: With dead ends: 260 [2021-12-17 16:12:59,088 INFO L226 Difference]: Without dead ends: 171 [2021-12-17 16:12:59,090 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 [2021-12-17 16:12:59,092 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 137 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:59,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 401 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-17 16:12:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-12-17 16:12:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.505952380952381) internal successors, (253), 168 states have internal predecessors, (253), 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) [2021-12-17 16:12:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 253 transitions. [2021-12-17 16:12:59,122 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 253 transitions. Word has length 48 [2021-12-17 16:12:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:59,122 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 253 transitions. [2021-12-17 16:12:59,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-12-17 16:12:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 253 transitions. [2021-12-17 16:12:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 16:12:59,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:59,124 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] [2021-12-17 16:12:59,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 16:12:59,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1971653998, now seen corresponding path program 1 times [2021-12-17 16:12:59,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813798880] [2021-12-17 16:12:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:59,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813798880] [2021-12-17 16:12:59,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813798880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:59,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237642515] [2021-12-17 16:12:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:59,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:59,182 INFO L87 Difference]: Start difference. First operand 169 states and 253 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-12-17 16:12:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:59,220 INFO L93 Difference]: Finished difference Result 421 states and 653 transitions. [2021-12-17 16:12:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:59,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-12-17 16:12:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:59,223 INFO L225 Difference]: With dead ends: 421 [2021-12-17 16:12:59,223 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 16:12:59,240 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 [2021-12-17 16:12:59,241 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 110 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:59,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 16:12:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2021-12-17 16:12:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.536231884057971) internal successors, (424), 276 states have internal predecessors, (424), 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) [2021-12-17 16:12:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 424 transitions. [2021-12-17 16:12:59,259 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 424 transitions. Word has length 49 [2021-12-17 16:12:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:59,259 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 424 transitions. [2021-12-17 16:12:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-12-17 16:12:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 424 transitions. [2021-12-17 16:12:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 16:12:59,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:59,260 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] [2021-12-17 16:12:59,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 16:12:59,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash 663495285, now seen corresponding path program 1 times [2021-12-17 16:12:59,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:59,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161460048] [2021-12-17 16:12:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161460048] [2021-12-17 16:12:59,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161460048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495706070] [2021-12-17 16:12:59,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:59,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:59,326 INFO L87 Difference]: Start difference. First operand 277 states and 424 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-17 16:12:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:59,360 INFO L93 Difference]: Finished difference Result 713 states and 1114 transitions. [2021-12-17 16:12:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2021-12-17 16:12:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:59,362 INFO L225 Difference]: With dead ends: 713 [2021-12-17 16:12:59,362 INFO L226 Difference]: Without dead ends: 463 [2021-12-17 16:12:59,363 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 [2021-12-17 16:12:59,364 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:59,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 333 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-17 16:12:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2021-12-17 16:12:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.5478260869565217) internal successors, (712), 460 states have internal predecessors, (712), 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) [2021-12-17 16:12:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 712 transitions. [2021-12-17 16:12:59,387 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 712 transitions. Word has length 50 [2021-12-17 16:12:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:59,387 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 712 transitions. [2021-12-17 16:12:59,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-17 16:12:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 712 transitions. [2021-12-17 16:12:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 16:12:59,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:59,388 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] [2021-12-17 16:12:59,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 16:12:59,389 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1706895887, now seen corresponding path program 1 times [2021-12-17 16:12:59,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969980435] [2021-12-17 16:12:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:59,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969980435] [2021-12-17 16:12:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969980435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:59,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586373975] [2021-12-17 16:12:59,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:59,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:59,430 INFO L87 Difference]: Start difference. First operand 461 states and 712 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-17 16:12:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:59,457 INFO L93 Difference]: Finished difference Result 1201 states and 1874 transitions. [2021-12-17 16:12:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2021-12-17 16:12:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:59,460 INFO L225 Difference]: With dead ends: 1201 [2021-12-17 16:12:59,460 INFO L226 Difference]: Without dead ends: 767 [2021-12-17 16:12:59,461 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 [2021-12-17 16:12:59,462 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 100 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:59,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-17 16:12:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 765. [2021-12-17 16:12:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.544502617801047) internal successors, (1180), 764 states have internal predecessors, (1180), 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) [2021-12-17 16:12:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1180 transitions. [2021-12-17 16:12:59,498 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1180 transitions. Word has length 51 [2021-12-17 16:12:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:59,499 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1180 transitions. [2021-12-17 16:12:59,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-17 16:12:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1180 transitions. [2021-12-17 16:12:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 16:12:59,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:59,500 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] [2021-12-17 16:12:59,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 16:12:59,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1133800764, now seen corresponding path program 1 times [2021-12-17 16:12:59,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620459290] [2021-12-17 16:12:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:59,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620459290] [2021-12-17 16:12:59,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620459290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679640095] [2021-12-17 16:12:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:59,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:59,556 INFO L87 Difference]: Start difference. First operand 765 states and 1180 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-17 16:12:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:59,707 INFO L93 Difference]: Finished difference Result 4455 states and 6945 transitions. [2021-12-17 16:12:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:12:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-12-17 16:12:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:59,718 INFO L225 Difference]: With dead ends: 4455 [2021-12-17 16:12:59,718 INFO L226 Difference]: Without dead ends: 3717 [2021-12-17 16:12:59,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:12:59,720 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 904 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:59,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1080 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2021-12-17 16:12:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 1501. [2021-12-17 16:12:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.5333333333333334) internal successors, (2300), 1500 states have internal predecessors, (2300), 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) [2021-12-17 16:12:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2300 transitions. [2021-12-17 16:12:59,854 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2300 transitions. Word has length 52 [2021-12-17 16:12:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2300 transitions. [2021-12-17 16:12:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-17 16:12:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2300 transitions. [2021-12-17 16:12:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 16:12:59,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:59,863 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] [2021-12-17 16:12:59,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 16:12:59,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash 768629036, now seen corresponding path program 1 times [2021-12-17 16:12:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720060774] [2021-12-17 16:12:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:59,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:59,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720060774] [2021-12-17 16:12:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720060774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:59,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:59,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:12:59,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354576181] [2021-12-17 16:12:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:12:59,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:12:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:12:59,953 INFO L87 Difference]: Start difference. First operand 1501 states and 2300 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-12-17 16:13:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:00,183 INFO L93 Difference]: Finished difference Result 6501 states and 9920 transitions. [2021-12-17 16:13:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:13:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 53 [2021-12-17 16:13:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:00,197 INFO L225 Difference]: With dead ends: 6501 [2021-12-17 16:13:00,198 INFO L226 Difference]: Without dead ends: 5027 [2021-12-17 16:13:00,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:13:00,203 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 442 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:00,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 833 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:13:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-12-17 16:13:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5021. [2021-12-17 16:13:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5021 states, 5020 states have (on average 1.5163346613545816) internal successors, (7612), 5020 states have internal predecessors, (7612), 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) [2021-12-17 16:13:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 7612 transitions. [2021-12-17 16:13:00,427 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 7612 transitions. Word has length 53 [2021-12-17 16:13:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 5021 states and 7612 transitions. [2021-12-17 16:13:00,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-12-17 16:13:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 7612 transitions. [2021-12-17 16:13:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 16:13:00,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:00,430 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] [2021-12-17 16:13:00,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 16:13:00,430 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1792030237, now seen corresponding path program 1 times [2021-12-17 16:13:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687350090] [2021-12-17 16:13:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:00,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:00,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687350090] [2021-12-17 16:13:00,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687350090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:00,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:00,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:13:00,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354622720] [2021-12-17 16:13:00,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:00,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:13:00,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:13:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:13:00,506 INFO L87 Difference]: Start difference. First operand 5021 states and 7612 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-12-17 16:13:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:00,972 INFO L93 Difference]: Finished difference Result 13905 states and 21118 transitions. [2021-12-17 16:13:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:13:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-12-17 16:13:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:00,997 INFO L225 Difference]: With dead ends: 13905 [2021-12-17 16:13:00,998 INFO L226 Difference]: Without dead ends: 8911 [2021-12-17 16:13:01,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:13:01,006 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 666 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:01,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 171 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:13:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8911 states. [2021-12-17 16:13:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8911 to 8909. [2021-12-17 16:13:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 1.5065110013471037) internal successors, (13420), 8908 states have internal predecessors, (13420), 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) [2021-12-17 16:13:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 13420 transitions. [2021-12-17 16:13:01,435 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 13420 transitions. Word has length 55 [2021-12-17 16:13:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:01,436 INFO L470 AbstractCegarLoop]: Abstraction has 8909 states and 13420 transitions. [2021-12-17 16:13:01,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-12-17 16:13:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 13420 transitions. [2021-12-17 16:13:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 16:13:01,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:01,438 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] [2021-12-17 16:13:01,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 16:13:01,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash -22058530, now seen corresponding path program 1 times [2021-12-17 16:13:01,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:01,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405103493] [2021-12-17 16:13:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:01,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:01,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405103493] [2021-12-17 16:13:01,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405103493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:01,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:01,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:13:01,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179098323] [2021-12-17 16:13:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:01,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:13:01,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:13:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:13:01,512 INFO L87 Difference]: Start difference. First operand 8909 states and 13420 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-17 16:13:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:02,185 INFO L93 Difference]: Finished difference Result 18239 states and 27261 transitions. [2021-12-17 16:13:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:13:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-12-17 16:13:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:02,234 INFO L225 Difference]: With dead ends: 18239 [2021-12-17 16:13:02,234 INFO L226 Difference]: Without dead ends: 18237 [2021-12-17 16:13:02,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:13:02,242 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 242 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:02,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 753 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18237 states. [2021-12-17 16:13:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18237 to 9357. [2021-12-17 16:13:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9357 states, 9356 states have (on average 1.4822573749465584) internal successors, (13868), 9356 states have internal predecessors, (13868), 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) [2021-12-17 16:13:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9357 states to 9357 states and 13868 transitions. [2021-12-17 16:13:02,746 INFO L78 Accepts]: Start accepts. Automaton has 9357 states and 13868 transitions. Word has length 55 [2021-12-17 16:13:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 9357 states and 13868 transitions. [2021-12-17 16:13:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-17 16:13:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9357 states and 13868 transitions. [2021-12-17 16:13:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 16:13:02,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:02,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:13:02,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 16:13:02,747 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -673241382, now seen corresponding path program 1 times [2021-12-17 16:13:02,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512117631] [2021-12-17 16:13:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:02,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:02,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512117631] [2021-12-17 16:13:02,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512117631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:02,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:02,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:13:02,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255757216] [2021-12-17 16:13:02,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:02,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:13:02,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:02,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:13:02,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:13:02,790 INFO L87 Difference]: Start difference. First operand 9357 states and 13868 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:13:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:03,293 INFO L93 Difference]: Finished difference Result 21051 states and 31132 transitions. [2021-12-17 16:13:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:13:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 16:13:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:03,311 INFO L225 Difference]: With dead ends: 21051 [2021-12-17 16:13:03,311 INFO L226 Difference]: Without dead ends: 11721 [2021-12-17 16:13:03,320 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 [2021-12-17 16:13:03,320 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 88 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:03,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11721 states. [2021-12-17 16:13:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11721 to 11719. [2021-12-17 16:13:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 1.4707287933094384) internal successors, (17234), 11718 states have internal predecessors, (17234), 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) [2021-12-17 16:13:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 17234 transitions. [2021-12-17 16:13:03,828 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 17234 transitions. Word has length 56 [2021-12-17 16:13:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:03,828 INFO L470 AbstractCegarLoop]: Abstraction has 11719 states and 17234 transitions. [2021-12-17 16:13:03,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:13:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 17234 transitions. [2021-12-17 16:13:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 16:13:03,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:03,833 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 16:13:03,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 16:13:03,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1821600213, now seen corresponding path program 1 times [2021-12-17 16:13:03,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:03,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597521727] [2021-12-17 16:13:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:03,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:13:03,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:03,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597521727] [2021-12-17 16:13:03,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597521727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 16:13:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778306782] [2021-12-17 16:13:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:03,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 16:13:03,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:13:03,895 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) [2021-12-17 16:13:03,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 16:13:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 16:13:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 16:13:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:13:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 16:13:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:13:04,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778306782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 16:13:04,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 16:13:04,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2021-12-17 16:13:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164966036] [2021-12-17 16:13:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 16:13:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:13:04,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:13:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:13:04,579 INFO L87 Difference]: Start difference. First operand 11719 states and 17234 transitions. Second operand has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 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) [2021-12-17 16:13:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:05,873 INFO L93 Difference]: Finished difference Result 39397 states and 58238 transitions. [2021-12-17 16:13:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 16:13:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 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 77 [2021-12-17 16:13:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:05,929 INFO L225 Difference]: With dead ends: 39397 [2021-12-17 16:13:05,929 INFO L226 Difference]: Without dead ends: 30067 [2021-12-17 16:13:05,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-12-17 16:13:05,945 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 947 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:05,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 1205 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30067 states. [2021-12-17 16:13:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30067 to 29031. [2021-12-17 16:13:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29031 states, 29030 states have (on average 1.4622803995866345) internal successors, (42450), 29030 states have internal predecessors, (42450), 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) [2021-12-17 16:13:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29031 states to 29031 states and 42450 transitions. [2021-12-17 16:13:07,406 INFO L78 Accepts]: Start accepts. Automaton has 29031 states and 42450 transitions. Word has length 77 [2021-12-17 16:13:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:07,407 INFO L470 AbstractCegarLoop]: Abstraction has 29031 states and 42450 transitions. [2021-12-17 16:13:07,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 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) [2021-12-17 16:13:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29031 states and 42450 transitions. [2021-12-17 16:13:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 16:13:07,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:07,412 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] [2021-12-17 16:13:07,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 16:13:07,627 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,SelfDestructingSolverStorable9 [2021-12-17 16:13:07,628 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1365606455, now seen corresponding path program 1 times [2021-12-17 16:13:07,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741633001] [2021-12-17 16:13:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:07,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:07,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741633001] [2021-12-17 16:13:07,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741633001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:07,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:13:07,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185866281] [2021-12-17 16:13:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:13:07,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:13:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:13:07,658 INFO L87 Difference]: Start difference. First operand 29031 states and 42450 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:09,481 INFO L93 Difference]: Finished difference Result 72160 states and 105244 transitions. [2021-12-17 16:13:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:13:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-12-17 16:13:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:09,546 INFO L225 Difference]: With dead ends: 72160 [2021-12-17 16:13:09,546 INFO L226 Difference]: Without dead ends: 46742 [2021-12-17 16:13:09,573 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 [2021-12-17 16:13:09,573 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 90 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:09,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 311 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46742 states. [2021-12-17 16:13:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46742 to 44988. [2021-12-17 16:13:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44988 states, 44987 states have (on average 1.4447284771156113) internal successors, (64994), 44987 states have internal predecessors, (64994), 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) [2021-12-17 16:13:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44988 states to 44988 states and 64994 transitions. [2021-12-17 16:13:12,271 INFO L78 Accepts]: Start accepts. Automaton has 44988 states and 64994 transitions. Word has length 78 [2021-12-17 16:13:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:12,271 INFO L470 AbstractCegarLoop]: Abstraction has 44988 states and 64994 transitions. [2021-12-17 16:13:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 44988 states and 64994 transitions. [2021-12-17 16:13:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 16:13:12,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:12,282 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] [2021-12-17 16:13:12,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 16:13:12,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1977851660, now seen corresponding path program 1 times [2021-12-17 16:13:12,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:12,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618665844] [2021-12-17 16:13:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:12,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:12,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618665844] [2021-12-17 16:13:12,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618665844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:12,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:12,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:13:12,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199910842] [2021-12-17 16:13:12,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:12,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:13:12,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:13:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:13:12,317 INFO L87 Difference]: Start difference. First operand 44988 states and 64994 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:15,104 INFO L93 Difference]: Finished difference Result 97842 states and 140662 transitions. [2021-12-17 16:13:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:13:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-12-17 16:13:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:15,213 INFO L225 Difference]: With dead ends: 97842 [2021-12-17 16:13:15,213 INFO L226 Difference]: Without dead ends: 64992 [2021-12-17 16:13:15,251 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 [2021-12-17 16:13:15,252 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 91 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:15,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 330 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64992 states. [2021-12-17 16:13:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64992 to 62054. [2021-12-17 16:13:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62054 states, 62053 states have (on average 1.4240729698805858) internal successors, (88368), 62053 states have internal predecessors, (88368), 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) [2021-12-17 16:13:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62054 states to 62054 states and 88368 transitions. [2021-12-17 16:13:18,488 INFO L78 Accepts]: Start accepts. Automaton has 62054 states and 88368 transitions. Word has length 78 [2021-12-17 16:13:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 62054 states and 88368 transitions. [2021-12-17 16:13:18,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 62054 states and 88368 transitions. [2021-12-17 16:13:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 16:13:18,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:18,497 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] [2021-12-17 16:13:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 16:13:18,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 440432859, now seen corresponding path program 1 times [2021-12-17 16:13:18,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411641238] [2021-12-17 16:13:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:18,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:13:18,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411641238] [2021-12-17 16:13:18,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411641238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:18,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:18,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:13:18,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902730308] [2021-12-17 16:13:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:18,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:13:18,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:13:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:13:18,537 INFO L87 Difference]: Start difference. First operand 62054 states and 88368 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:13:21,954 INFO L93 Difference]: Finished difference Result 104109 states and 147285 transitions. [2021-12-17 16:13:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:13:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-12-17 16:13:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:13:22,059 INFO L225 Difference]: With dead ends: 104109 [2021-12-17 16:13:22,059 INFO L226 Difference]: Without dead ends: 64599 [2021-12-17 16:13:22,104 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 [2021-12-17 16:13:22,106 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 92 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:13:22,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 349 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:13:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64599 states. [2021-12-17 16:13:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64599 to 61690. [2021-12-17 16:13:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61690 states, 61689 states have (on average 1.40187067386406) internal successors, (86480), 61689 states have internal predecessors, (86480), 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) [2021-12-17 16:13:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61690 states to 61690 states and 86480 transitions. [2021-12-17 16:13:25,332 INFO L78 Accepts]: Start accepts. Automaton has 61690 states and 86480 transitions. Word has length 78 [2021-12-17 16:13:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:13:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 61690 states and 86480 transitions. [2021-12-17 16:13:25,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-12-17 16:13:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 61690 states and 86480 transitions. [2021-12-17 16:13:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 16:13:25,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:13:25,341 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] [2021-12-17 16:13:25,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 16:13:25,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:13:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:13:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -739881820, now seen corresponding path program 1 times [2021-12-17 16:13:25,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:13:25,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562134304] [2021-12-17 16:13:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:13:25,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:13:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:13:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:13:25,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:13:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562134304] [2021-12-17 16:13:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562134304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:13:25,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:13:25,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:13:25,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63539315] [2021-12-17 16:13:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:13:25,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:13:25,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:13:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:13:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:13:25,387 INFO L87 Difference]: Start difference. First operand 61690 states and 86480 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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)