./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.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 b7a355896b8b65b5a2cb80c69f28000f566073d33b0003da7d28a637c6d5db6a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:47:15,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:47:15,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:47:15,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:47:15,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:47:15,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:47:15,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:47:15,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:47:15,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:47:15,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:47:15,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:47:15,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:47:15,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:47:15,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:47:15,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:47:15,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:47:15,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:47:15,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:47:15,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:47:15,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:47:15,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:47:15,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:47:15,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:47:15,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:47:15,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:47:15,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:47:15,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:47:15,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:47:15,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:47:15,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:47:15,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:47:15,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:47:15,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:47:15,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:47:15,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:47:15,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:47:15,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:47:15,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:47:15,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:47:15,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:47:15,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:47:15,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:47:15,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:47:15,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:47:15,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:47:15,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:47:15,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:47:15,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:47:16,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:47:16,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:47:16,000 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:47:16,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:47:16,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:47:16,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:47:16,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:47:16,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:47:16,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:47:16,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:47:16,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:47:16,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:47:16,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:47:16,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:47:16,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:47:16,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:47:16,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:47:16,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:47:16,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:47:16,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:47:16,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:47:16,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:47:16,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:47:16,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7a355896b8b65b5a2cb80c69f28000f566073d33b0003da7d28a637c6d5db6a [2021-12-17 15:47:16,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:47:16,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:47:16,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:47:16,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:47:16,279 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:47:16,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-17 15:47:16,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e417c1936/0250e69d3f8f4dd7a4d4d7d42a4cdad6/FLAG91be1b5f1 [2021-12-17 15:47:16,755 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:47:16,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-17 15:47:16,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e417c1936/0250e69d3f8f4dd7a4d4d7d42a4cdad6/FLAG91be1b5f1 [2021-12-17 15:47:17,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e417c1936/0250e69d3f8f4dd7a4d4d7d42a4cdad6 [2021-12-17 15:47:17,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:47:17,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:47:17,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:47:17,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:47:17,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:47:17,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f9ea9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17, skipping insertion in model container [2021-12-17 15:47:17,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:47:17,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:47:17,395 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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2021-12-17 15:47:17,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:47:17,407 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:47:17,448 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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2021-12-17 15:47:17,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:47:17,461 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:47:17,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17 WrapperNode [2021-12-17 15:47:17,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:47:17,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:47:17,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:47:17,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:47:17,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,524 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 443 [2021-12-17 15:47:17,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:47:17,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:47:17,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:47:17,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:47:17,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:47:17,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:47:17,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:47:17,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:47:17,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (1/1) ... [2021-12-17 15:47:17,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:47:17,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:47:17,604 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 15:47:17,618 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 15:47:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:47:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:47:17,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:47:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:47:17,721 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:47:17,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:47:18,158 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:47:18,173 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:47:18,173 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 15:47:18,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:47:18 BoogieIcfgContainer [2021-12-17 15:47:18,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:47:18,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:47:18,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:47:18,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:47:18,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:47:17" (1/3) ... [2021-12-17 15:47:18,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:47:18, skipping insertion in model container [2021-12-17 15:47:18,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:47:17" (2/3) ... [2021-12-17 15:47:18,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:47:18, skipping insertion in model container [2021-12-17 15:47:18,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:47:18" (3/3) ... [2021-12-17 15:47:18,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2021-12-17 15:47:18,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:47:18,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:47:18,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:47:18,238 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 15:47:18,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:47:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 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 15:47:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 15:47:18,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:18,263 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] [2021-12-17 15:47:18,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2021-12-17 15:47:18,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000950544] [2021-12-17 15:47:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:18,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:18,478 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 15:47:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000950544] [2021-12-17 15:47:18,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000950544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:18,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:18,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 15:47:18,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023731601] [2021-12-17 15:47:18,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:18,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 15:47:18,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 15:47:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:47:18,516 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:47:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:18,545 INFO L93 Difference]: Finished difference Result 214 states and 367 transitions. [2021-12-17 15:47:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 15:47:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-17 15:47:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:18,555 INFO L225 Difference]: With dead ends: 214 [2021-12-17 15:47:18,555 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 15:47:18,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:47:18,560 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:18,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 15:47:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-17 15:47:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 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 15:47:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2021-12-17 15:47:18,606 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2021-12-17 15:47:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:18,606 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2021-12-17 15:47:18,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:47:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2021-12-17 15:47:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 15:47:18,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:18,609 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] [2021-12-17 15:47:18,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:47:18,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2021-12-17 15:47:18,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:18,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191293978] [2021-12-17 15:47:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:18,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:18,814 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 15:47:18,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191293978] [2021-12-17 15:47:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191293978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:18,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:18,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:18,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169716268] [2021-12-17 15:47:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:18,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:18,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:18,822 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:47:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:18,894 INFO L93 Difference]: Finished difference Result 213 states and 360 transitions. [2021-12-17 15:47:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:47:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-17 15:47:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:18,897 INFO L225 Difference]: With dead ends: 213 [2021-12-17 15:47:18,897 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 15:47:18,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:47:18,899 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:18,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 878 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 15:47:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-17 15:47:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.5303030303030303) internal successors, (202), 132 states have internal predecessors, (202), 0 states have call successors, (0), 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 15:47:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-12-17 15:47:18,907 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 37 [2021-12-17 15:47:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:18,908 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-12-17 15:47:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:47:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-12-17 15:47:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 15:47:18,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:18,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:18,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:47:18,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2021-12-17 15:47:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648356178] [2021-12-17 15:47:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:19,028 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 15:47:19,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:19,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648356178] [2021-12-17 15:47:19,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648356178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:19,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:19,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:19,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620421605] [2021-12-17 15:47:19,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:19,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:19,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:19,032 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:19,087 INFO L93 Difference]: Finished difference Result 276 states and 439 transitions. [2021-12-17 15:47:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 15:47:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:19,091 INFO L225 Difference]: With dead ends: 276 [2021-12-17 15:47:19,092 INFO L226 Difference]: Without dead ends: 200 [2021-12-17 15:47:19,092 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 15:47:19,094 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:19,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 355 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-17 15:47:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2021-12-17 15:47:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.5510204081632653) internal successors, (304), 196 states have internal predecessors, (304), 0 states have call successors, (0), 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 15:47:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 304 transitions. [2021-12-17 15:47:19,112 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 304 transitions. Word has length 63 [2021-12-17 15:47:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:19,113 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 304 transitions. [2021-12-17 15:47:19,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 304 transitions. [2021-12-17 15:47:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 15:47:19,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:19,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:19,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:47:19,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2021-12-17 15:47:19,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54728022] [2021-12-17 15:47:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:19,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:19,179 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 15:47:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54728022] [2021-12-17 15:47:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54728022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:19,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:19,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:19,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647076958] [2021-12-17 15:47:19,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:19,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:19,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:19,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:19,183 INFO L87 Difference]: Start difference. First operand 197 states and 304 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:19,205 INFO L93 Difference]: Finished difference Result 463 states and 736 transitions. [2021-12-17 15:47:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:19,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-17 15:47:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:19,208 INFO L225 Difference]: With dead ends: 463 [2021-12-17 15:47:19,208 INFO L226 Difference]: Without dead ends: 323 [2021-12-17 15:47:19,209 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 15:47:19,210 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:19,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 368 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-17 15:47:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2021-12-17 15:47:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5723270440251573) internal successors, (500), 318 states have internal predecessors, (500), 0 states have call successors, (0), 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 15:47:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 500 transitions. [2021-12-17 15:47:19,249 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 500 transitions. Word has length 65 [2021-12-17 15:47:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:19,251 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 500 transitions. [2021-12-17 15:47:19,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 500 transitions. [2021-12-17 15:47:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:47:19,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:19,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:19,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:47:19,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2021-12-17 15:47:19,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:19,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996031538] [2021-12-17 15:47:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:19,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:19,356 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 15:47:19,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996031538] [2021-12-17 15:47:19,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996031538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:19,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:19,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:19,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043583988] [2021-12-17 15:47:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:19,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:19,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:19,362 INFO L87 Difference]: Start difference. First operand 319 states and 500 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:19,403 INFO L93 Difference]: Finished difference Result 815 states and 1298 transitions. [2021-12-17 15:47:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 15:47:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:19,408 INFO L225 Difference]: With dead ends: 815 [2021-12-17 15:47:19,408 INFO L226 Difference]: Without dead ends: 553 [2021-12-17 15:47:19,412 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 15:47:19,417 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:19,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 369 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-12-17 15:47:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 547. [2021-12-17 15:47:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.575091575091575) internal successors, (860), 546 states have internal predecessors, (860), 0 states have call successors, (0), 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 15:47:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 860 transitions. [2021-12-17 15:47:19,462 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 860 transitions. Word has length 67 [2021-12-17 15:47:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:19,463 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 860 transitions. [2021-12-17 15:47:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 860 transitions. [2021-12-17 15:47:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 15:47:19,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:19,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:19,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:47:19,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2021-12-17 15:47:19,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:19,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130855433] [2021-12-17 15:47:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:19,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:19,569 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 15:47:19,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130855433] [2021-12-17 15:47:19,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130855433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:19,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:19,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:19,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780256556] [2021-12-17 15:47:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:19,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:19,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:19,571 INFO L87 Difference]: Start difference. First operand 547 states and 860 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:47:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:19,718 INFO L93 Difference]: Finished difference Result 2339 states and 3782 transitions. [2021-12-17 15:47:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:47:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-17 15:47:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:19,727 INFO L225 Difference]: With dead ends: 2339 [2021-12-17 15:47:19,727 INFO L226 Difference]: Without dead ends: 1849 [2021-12-17 15:47:19,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:47:19,731 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 861 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:19,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:47:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-12-17 15:47:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 975. [2021-12-17 15:47:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 1.5882956878850103) internal successors, (1547), 974 states have internal predecessors, (1547), 0 states have call successors, (0), 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 15:47:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1547 transitions. [2021-12-17 15:47:19,773 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1547 transitions. Word has length 69 [2021-12-17 15:47:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:19,774 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1547 transitions. [2021-12-17 15:47:19,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:47:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1547 transitions. [2021-12-17 15:47:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 15:47:19,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:19,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:19,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:47:19,777 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2021-12-17 15:47:19,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:19,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998379395] [2021-12-17 15:47:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:19,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:19,858 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 15:47:19,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:19,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998379395] [2021-12-17 15:47:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998379395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:19,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:19,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:47:19,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414698811] [2021-12-17 15:47:19,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:19,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:47:19,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:47:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:47:19,862 INFO L87 Difference]: Start difference. First operand 975 states and 1547 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:19,935 INFO L93 Difference]: Finished difference Result 2837 states and 4577 transitions. [2021-12-17 15:47:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:47:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 15:47:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:19,946 INFO L225 Difference]: With dead ends: 2837 [2021-12-17 15:47:19,946 INFO L226 Difference]: Without dead ends: 1919 [2021-12-17 15:47:19,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:19,950 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 365 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:19,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 585 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-12-17 15:47:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1438. [2021-12-17 15:47:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 1.5984690327070286) internal successors, (2297), 1437 states have internal predecessors, (2297), 0 states have call successors, (0), 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 15:47:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2297 transitions. [2021-12-17 15:47:19,997 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2297 transitions. Word has length 70 [2021-12-17 15:47:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 2297 transitions. [2021-12-17 15:47:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2297 transitions. [2021-12-17 15:47:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 15:47:19,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:19,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:47:20,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2021-12-17 15:47:20,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:20,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136124412] [2021-12-17 15:47:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:20,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:20,046 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 15:47:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136124412] [2021-12-17 15:47:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136124412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:20,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:20,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:47:20,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828736425] [2021-12-17 15:47:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:47:20,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:47:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:47:20,050 INFO L87 Difference]: Start difference. First operand 1438 states and 2297 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:20,149 INFO L93 Difference]: Finished difference Result 4165 states and 6715 transitions. [2021-12-17 15:47:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:47:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-17 15:47:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:20,159 INFO L225 Difference]: With dead ends: 4165 [2021-12-17 15:47:20,159 INFO L226 Difference]: Without dead ends: 2784 [2021-12-17 15:47:20,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:20,162 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 363 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:20,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-12-17 15:47:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2099. [2021-12-17 15:47:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 1.5986653956148713) internal successors, (3354), 2098 states have internal predecessors, (3354), 0 states have call successors, (0), 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 15:47:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3354 transitions. [2021-12-17 15:47:20,235 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3354 transitions. Word has length 71 [2021-12-17 15:47:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 3354 transitions. [2021-12-17 15:47:20,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:47:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3354 transitions. [2021-12-17 15:47:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 15:47:20,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:20,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:20,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:47:20,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2021-12-17 15:47:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:20,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180088074] [2021-12-17 15:47:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:20,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:20,299 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 15:47:20,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:20,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180088074] [2021-12-17 15:47:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180088074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:20,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565260796] [2021-12-17 15:47:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:20,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:20,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:20,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:20,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:20,302 INFO L87 Difference]: Start difference. First operand 2099 states and 3354 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:20,363 INFO L93 Difference]: Finished difference Result 4342 states and 6948 transitions. [2021-12-17 15:47:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-17 15:47:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:20,374 INFO L225 Difference]: With dead ends: 4342 [2021-12-17 15:47:20,375 INFO L226 Difference]: Without dead ends: 3126 [2021-12-17 15:47:20,378 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 15:47:20,380 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 96 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 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 15:47:20,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-12-17 15:47:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3124. [2021-12-17 15:47:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 1.585014409221902) internal successors, (4950), 3123 states have internal predecessors, (4950), 0 states have call successors, (0), 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 15:47:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 4950 transitions. [2021-12-17 15:47:20,491 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 4950 transitions. Word has length 72 [2021-12-17 15:47:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:20,491 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 4950 transitions. [2021-12-17 15:47:20,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 4950 transitions. [2021-12-17 15:47:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 15:47:20,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:20,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:47:20,494 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2021-12-17 15:47:20,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:20,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370745176] [2021-12-17 15:47:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:20,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:20,535 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 15:47:20,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:20,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370745176] [2021-12-17 15:47:20,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370745176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:20,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:20,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:47:20,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547456131] [2021-12-17 15:47:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:47:20,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:47:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:47:20,537 INFO L87 Difference]: Start difference. First operand 3124 states and 4950 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:20,706 INFO L93 Difference]: Finished difference Result 9396 states and 15009 transitions. [2021-12-17 15:47:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:47:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-17 15:47:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:20,728 INFO L225 Difference]: With dead ends: 9396 [2021-12-17 15:47:20,729 INFO L226 Difference]: Without dead ends: 6460 [2021-12-17 15:47:20,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:20,733 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:20,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2021-12-17 15:47:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 4776. [2021-12-17 15:47:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4776 states, 4775 states have (on average 1.584083769633508) internal successors, (7564), 4775 states have internal predecessors, (7564), 0 states have call successors, (0), 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 15:47:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 7564 transitions. [2021-12-17 15:47:20,936 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 7564 transitions. Word has length 72 [2021-12-17 15:47:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 4776 states and 7564 transitions. [2021-12-17 15:47:20,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 7564 transitions. [2021-12-17 15:47:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 15:47:20,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:20,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:20,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:47:20,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2021-12-17 15:47:20,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:20,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873896823] [2021-12-17 15:47:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:20,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:20,978 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 15:47:20,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873896823] [2021-12-17 15:47:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873896823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:20,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:20,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:20,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179681345] [2021-12-17 15:47:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:20,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:20,981 INFO L87 Difference]: Start difference. First operand 4776 states and 7564 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:21,141 INFO L93 Difference]: Finished difference Result 10472 states and 16650 transitions. [2021-12-17 15:47:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-17 15:47:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:21,181 INFO L225 Difference]: With dead ends: 10472 [2021-12-17 15:47:21,181 INFO L226 Difference]: Without dead ends: 7115 [2021-12-17 15:47:21,186 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 15:47:21,187 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 102 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 443 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 15:47:21,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2021-12-17 15:47:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 7113. [2021-12-17 15:47:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 1.5752249718785152) internal successors, (11203), 7112 states have internal predecessors, (11203), 0 states have call successors, (0), 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 15:47:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 11203 transitions. [2021-12-17 15:47:21,495 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 11203 transitions. Word has length 72 [2021-12-17 15:47:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:21,495 INFO L470 AbstractCegarLoop]: Abstraction has 7113 states and 11203 transitions. [2021-12-17 15:47:21,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 11203 transitions. [2021-12-17 15:47:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 15:47:21,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:21,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:21,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:47:21,496 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 134390635, now seen corresponding path program 1 times [2021-12-17 15:47:21,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:21,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927643671] [2021-12-17 15:47:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:21,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:21,532 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 15:47:21,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927643671] [2021-12-17 15:47:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927643671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:21,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:21,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:21,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982409955] [2021-12-17 15:47:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:21,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:21,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:21,534 INFO L87 Difference]: Start difference. First operand 7113 states and 11203 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:21,792 INFO L93 Difference]: Finished difference Result 15869 states and 25266 transitions. [2021-12-17 15:47:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-17 15:47:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:21,814 INFO L225 Difference]: With dead ends: 15869 [2021-12-17 15:47:21,814 INFO L226 Difference]: Without dead ends: 10691 [2021-12-17 15:47:21,822 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 15:47:21,822 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 464 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 15:47:21,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 464 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10691 states. [2021-12-17 15:47:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10691 to 10689. [2021-12-17 15:47:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 1.5716691616766467) internal successors, (16798), 10688 states have internal predecessors, (16798), 0 states have call successors, (0), 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 15:47:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 16798 transitions. [2021-12-17 15:47:22,214 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 16798 transitions. Word has length 72 [2021-12-17 15:47:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:22,215 INFO L470 AbstractCegarLoop]: Abstraction has 10689 states and 16798 transitions. [2021-12-17 15:47:22,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 15:47:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 16798 transitions. [2021-12-17 15:47:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 15:47:22,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:22,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:22,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 15:47:22,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2021-12-17 15:47:22,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692607039] [2021-12-17 15:47:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:22,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:22,322 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 15:47:22,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:22,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692607039] [2021-12-17 15:47:22,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692607039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:22,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:22,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:22,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993852246] [2021-12-17 15:47:22,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:22,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:22,325 INFO L87 Difference]: Start difference. First operand 10689 states and 16798 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 15:47:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:22,671 INFO L93 Difference]: Finished difference Result 21301 states and 33492 transitions. [2021-12-17 15:47:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:47:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-17 15:47:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:22,691 INFO L225 Difference]: With dead ends: 21301 [2021-12-17 15:47:22,691 INFO L226 Difference]: Without dead ends: 10691 [2021-12-17 15:47:22,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:47:22,704 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 362 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:22,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 543 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10691 states. [2021-12-17 15:47:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10691 to 10689. [2021-12-17 15:47:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 1.5599738023952097) internal successors, (16673), 10688 states have internal predecessors, (16673), 0 states have call successors, (0), 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 15:47:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 16673 transitions. [2021-12-17 15:47:23,065 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 16673 transitions. Word has length 74 [2021-12-17 15:47:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 10689 states and 16673 transitions. [2021-12-17 15:47:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 15:47:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 16673 transitions. [2021-12-17 15:47:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 15:47:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:23,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:23,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 15:47:23,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1698241801, now seen corresponding path program 1 times [2021-12-17 15:47:23,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364389900] [2021-12-17 15:47:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:23,182 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 15:47:23,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:23,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364389900] [2021-12-17 15:47:23,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364389900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:23,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:23,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:23,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339675519] [2021-12-17 15:47:23,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:23,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:23,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:23,185 INFO L87 Difference]: Start difference. First operand 10689 states and 16673 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2021-12-17 15:47:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:23,630 INFO L93 Difference]: Finished difference Result 30615 states and 47912 transitions. [2021-12-17 15:47:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:47:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) Word has length 77 [2021-12-17 15:47:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:23,671 INFO L225 Difference]: With dead ends: 30615 [2021-12-17 15:47:23,671 INFO L226 Difference]: Without dead ends: 20005 [2021-12-17 15:47:23,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:47:23,689 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 356 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:23,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 547 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20005 states. [2021-12-17 15:47:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20005 to 20003. [2021-12-17 15:47:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20003 states, 20002 states have (on average 1.5475452454754524) internal successors, (30954), 20002 states have internal predecessors, (30954), 0 states have call successors, (0), 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 15:47:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20003 states to 20003 states and 30954 transitions. [2021-12-17 15:47:24,337 INFO L78 Accepts]: Start accepts. Automaton has 20003 states and 30954 transitions. Word has length 77 [2021-12-17 15:47:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:24,338 INFO L470 AbstractCegarLoop]: Abstraction has 20003 states and 30954 transitions. [2021-12-17 15:47:24,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2021-12-17 15:47:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20003 states and 30954 transitions. [2021-12-17 15:47:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 15:47:24,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:24,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:24,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 15:47:24,340 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 677312633, now seen corresponding path program 1 times [2021-12-17 15:47:24,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:24,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275932313] [2021-12-17 15:47:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:24,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:24,403 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 15:47:24,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275932313] [2021-12-17 15:47:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275932313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:24,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:24,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:24,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755623674] [2021-12-17 15:47:24,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:24,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:24,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:24,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:24,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:24,405 INFO L87 Difference]: Start difference. First operand 20003 states and 30954 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 15:47:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:25,249 INFO L93 Difference]: Finished difference Result 39191 states and 60008 transitions. [2021-12-17 15:47:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:47:25,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 15:47:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:25,338 INFO L225 Difference]: With dead ends: 39191 [2021-12-17 15:47:25,339 INFO L226 Difference]: Without dead ends: 39189 [2021-12-17 15:47:25,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:47:25,355 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 323 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:25,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 866 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39189 states. [2021-12-17 15:47:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39189 to 21089. [2021-12-17 15:47:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21089 states, 21088 states have (on average 1.518920713201821) internal successors, (32031), 21088 states have internal predecessors, (32031), 0 states have call successors, (0), 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 15:47:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21089 states to 21089 states and 32031 transitions. [2021-12-17 15:47:26,194 INFO L78 Accepts]: Start accepts. Automaton has 21089 states and 32031 transitions. Word has length 78 [2021-12-17 15:47:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:26,194 INFO L470 AbstractCegarLoop]: Abstraction has 21089 states and 32031 transitions. [2021-12-17 15:47:26,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 15:47:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21089 states and 32031 transitions. [2021-12-17 15:47:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 15:47:26,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:26,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:26,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 15:47:26,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash -931565963, now seen corresponding path program 1 times [2021-12-17 15:47:26,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:26,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693810606] [2021-12-17 15:47:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:26,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 15:47:26,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693810606] [2021-12-17 15:47:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693810606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:26,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:26,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866781186] [2021-12-17 15:47:26,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:26,265 INFO L87 Difference]: Start difference. First operand 21089 states and 32031 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 15:47:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:27,176 INFO L93 Difference]: Finished difference Result 51599 states and 78693 transitions. [2021-12-17 15:47:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:47:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 105 [2021-12-17 15:47:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:27,245 INFO L225 Difference]: With dead ends: 51599 [2021-12-17 15:47:27,245 INFO L226 Difference]: Without dead ends: 41597 [2021-12-17 15:47:27,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:47:27,270 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 463 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:27,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 831 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41597 states. [2021-12-17 15:47:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41597 to 32429. [2021-12-17 15:47:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32429 states, 32428 states have (on average 1.5179782903663501) internal successors, (49225), 32428 states have internal predecessors, (49225), 0 states have call successors, (0), 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 15:47:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32429 states to 32429 states and 49225 transitions. [2021-12-17 15:47:28,415 INFO L78 Accepts]: Start accepts. Automaton has 32429 states and 49225 transitions. Word has length 105 [2021-12-17 15:47:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:28,416 INFO L470 AbstractCegarLoop]: Abstraction has 32429 states and 49225 transitions. [2021-12-17 15:47:28,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 15:47:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32429 states and 49225 transitions. [2021-12-17 15:47:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 15:47:28,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:28,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 15:47:28,419 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2025931908, now seen corresponding path program 1 times [2021-12-17 15:47:28,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803609609] [2021-12-17 15:47:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:28,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 15:47:28,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803609609] [2021-12-17 15:47:28,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803609609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:28,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:28,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:47:28,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945873099] [2021-12-17 15:47:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:28,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:47:28,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:47:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:47:28,478 INFO L87 Difference]: Start difference. First operand 32429 states and 49225 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 15:47:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:29,502 INFO L93 Difference]: Finished difference Result 55607 states and 84829 transitions. [2021-12-17 15:47:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:47:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 105 [2021-12-17 15:47:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:29,573 INFO L225 Difference]: With dead ends: 55607 [2021-12-17 15:47:29,573 INFO L226 Difference]: Without dead ends: 45605 [2021-12-17 15:47:29,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:47:29,602 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 457 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:29,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 891 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45605 states. [2021-12-17 15:47:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45605 to 43951. [2021-12-17 15:47:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43951 states, 43950 states have (on average 1.5191581342434586) internal successors, (66767), 43950 states have internal predecessors, (66767), 0 states have call successors, (0), 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 15:47:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43951 states to 43951 states and 66767 transitions. [2021-12-17 15:47:30,694 INFO L78 Accepts]: Start accepts. Automaton has 43951 states and 66767 transitions. Word has length 105 [2021-12-17 15:47:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:30,698 INFO L470 AbstractCegarLoop]: Abstraction has 43951 states and 66767 transitions. [2021-12-17 15:47:30,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 15:47:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 43951 states and 66767 transitions. [2021-12-17 15:47:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 15:47:30,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:30,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:30,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 15:47:30,701 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:30,702 INFO L85 PathProgramCache]: Analyzing trace with hash -166608879, now seen corresponding path program 1 times [2021-12-17 15:47:30,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:30,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339538977] [2021-12-17 15:47:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:30,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:47:30,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:30,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339538977] [2021-12-17 15:47:30,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339538977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:30,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:30,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:30,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407831189] [2021-12-17 15:47:30,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:30,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:30,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:30,748 INFO L87 Difference]: Start difference. First operand 43951 states and 66767 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 15:47:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:32,506 INFO L93 Difference]: Finished difference Result 91773 states and 140139 transitions. [2021-12-17 15:47:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 105 [2021-12-17 15:47:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:32,612 INFO L225 Difference]: With dead ends: 91773 [2021-12-17 15:47:32,612 INFO L226 Difference]: Without dead ends: 81511 [2021-12-17 15:47:32,639 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 15:47:32,639 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 85 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:32,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 373 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81511 states. [2021-12-17 15:47:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81511 to 81394. [2021-12-17 15:47:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81394 states, 81393 states have (on average 1.5231285245659947) internal successors, (123972), 81393 states have internal predecessors, (123972), 0 states have call successors, (0), 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 15:47:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81394 states to 81394 states and 123972 transitions. [2021-12-17 15:47:34,747 INFO L78 Accepts]: Start accepts. Automaton has 81394 states and 123972 transitions. Word has length 105 [2021-12-17 15:47:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:34,747 INFO L470 AbstractCegarLoop]: Abstraction has 81394 states and 123972 transitions. [2021-12-17 15:47:34,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 15:47:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 81394 states and 123972 transitions. [2021-12-17 15:47:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 15:47:34,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:34,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:34,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 15:47:34,750 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1581376920, now seen corresponding path program 1 times [2021-12-17 15:47:34,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219201672] [2021-12-17 15:47:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:34,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:47:34,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219201672] [2021-12-17 15:47:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219201672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:34,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:34,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:34,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389758422] [2021-12-17 15:47:34,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:34,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:34,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:34,788 INFO L87 Difference]: Start difference. First operand 81394 states and 123972 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 15:47:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:38,187 INFO L93 Difference]: Finished difference Result 241522 states and 367567 transitions. [2021-12-17 15:47:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:47:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-17 15:47:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:38,445 INFO L225 Difference]: With dead ends: 241522 [2021-12-17 15:47:38,445 INFO L226 Difference]: Without dead ends: 160199 [2021-12-17 15:47:38,515 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 15:47:38,516 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 131 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:38,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 451 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160199 states. [2021-12-17 15:47:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160199 to 160197. [2021-12-17 15:47:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160197 states, 160196 states have (on average 1.5108804214836824) internal successors, (242037), 160196 states have internal predecessors, (242037), 0 states have call successors, (0), 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 15:47:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160197 states to 160197 states and 242037 transitions. [2021-12-17 15:47:43,263 INFO L78 Accepts]: Start accepts. Automaton has 160197 states and 242037 transitions. Word has length 106 [2021-12-17 15:47:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:43,264 INFO L470 AbstractCegarLoop]: Abstraction has 160197 states and 242037 transitions. [2021-12-17 15:47:43,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 15:47:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 160197 states and 242037 transitions. [2021-12-17 15:47:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 15:47:43,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:43,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:43,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 15:47:43,269 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1079524893, now seen corresponding path program 1 times [2021-12-17 15:47:43,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:43,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165488767] [2021-12-17 15:47:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:43,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:47:43,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:43,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165488767] [2021-12-17 15:47:43,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165488767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:43,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:43,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:47:43,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043079509] [2021-12-17 15:47:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:43,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:47:43,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:47:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:47:43,314 INFO L87 Difference]: Start difference. First operand 160197 states and 242037 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 15:47:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:47:47,102 INFO L93 Difference]: Finished difference Result 259797 states and 394072 transitions. [2021-12-17 15:47:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:47:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2021-12-17 15:47:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:47:47,383 INFO L225 Difference]: With dead ends: 259797 [2021-12-17 15:47:47,383 INFO L226 Difference]: Without dead ends: 167101 [2021-12-17 15:47:47,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:47:47,461 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 195 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:47:47,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 680 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:47:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167101 states. [2021-12-17 15:47:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167101 to 111783. [2021-12-17 15:47:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111783 states, 111782 states have (on average 1.5052423467105616) internal successors, (168259), 111782 states have internal predecessors, (168259), 0 states have call successors, (0), 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 15:47:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111783 states to 111783 states and 168259 transitions. [2021-12-17 15:47:51,392 INFO L78 Accepts]: Start accepts. Automaton has 111783 states and 168259 transitions. Word has length 106 [2021-12-17 15:47:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:47:51,392 INFO L470 AbstractCegarLoop]: Abstraction has 111783 states and 168259 transitions. [2021-12-17 15:47:51,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 15:47:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 111783 states and 168259 transitions. [2021-12-17 15:47:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 15:47:51,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:47:51,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:47:51,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 15:47:51,397 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:47:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:47:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash 963648190, now seen corresponding path program 1 times [2021-12-17 15:47:51,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:47:51,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192175650] [2021-12-17 15:47:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:47:51,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:47:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:47:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:47:51,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:47:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192175650] [2021-12-17 15:47:51,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192175650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:47:51,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:47:51,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:47:51,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784819601] [2021-12-17 15:47:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:47:51,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:47:51,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:47:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:47:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:47:51,436 INFO L87 Difference]: Start difference. First operand 111783 states and 168259 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)