./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label17.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/eca-rers2012/Problem15_label17.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 42b374d0017cdae74eebab609ba5393370e8c987522e66a98f57a11c3f33505a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:47:22,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:47:22,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:47:22,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:47:22,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:47:22,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:47:22,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:47:22,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:47:22,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:47:22,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:47:22,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:47:22,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:47:22,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:47:22,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:47:22,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:47:22,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:47:22,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:47:22,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:47:22,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:47:22,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:47:22,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:47:22,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:47:22,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:47:22,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:47:22,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:47:22,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:47:22,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:47:22,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:47:22,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:47:23,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:47:23,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:47:23,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:47:23,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:47:23,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:47:23,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:47:23,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:47:23,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:47:23,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:47:23,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:47:23,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:47:23,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:47:23,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:47:23,023 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:47:23,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:47:23,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:47:23,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:47:23,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:47:23,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:47:23,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:47:23,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:47:23,025 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:47:23,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:47:23,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:47:23,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:47:23,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:47:23,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:47:23,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:47:23,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:47:23,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:47:23,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:47:23,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:47:23,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:47:23,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:47:23,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:47:23,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42b374d0017cdae74eebab609ba5393370e8c987522e66a98f57a11c3f33505a [2021-12-17 04:47:23,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:47:23,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:47:23,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:47:23,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:47:23,257 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:47:23,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label17.c [2021-12-17 04:47:23,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2541ebe1/dc47444f43ac4dd29193dca4f0c048ca/FLAG6f5029c26 [2021-12-17 04:47:23,810 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:47:23,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label17.c [2021-12-17 04:47:23,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2541ebe1/dc47444f43ac4dd29193dca4f0c048ca/FLAG6f5029c26 [2021-12-17 04:47:24,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2541ebe1/dc47444f43ac4dd29193dca4f0c048ca [2021-12-17 04:47:24,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:47:24,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:47:24,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:47:24,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:47:24,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:47:24,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:24,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423b008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24, skipping insertion in model container [2021-12-17 04:47:24,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:24,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:47:24,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:47:24,543 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label17.c[7664,7677] [2021-12-17 04:47:24,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:47:24,829 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:47:24,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label17.c[7664,7677] [2021-12-17 04:47:24,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:47:24,984 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:47:24,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24 WrapperNode [2021-12-17 04:47:24,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:47:24,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:47:24,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:47:24,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:47:24,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,191 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-17 04:47:25,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:47:25,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:47:25,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:47:25,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:47:25,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:47:25,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:47:25,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:47:25,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:47:25,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (1/1) ... [2021-12-17 04:47:25,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:47:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:25,374 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 04:47:25,392 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 04:47:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:47:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:47:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:47:25,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:47:25,458 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:47:25,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:47:27,111 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:47:27,118 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:47:27,119 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:47:27,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:47:27 BoogieIcfgContainer [2021-12-17 04:47:27,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:47:27,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:47:27,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:47:27,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:47:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:47:24" (1/3) ... [2021-12-17 04:47:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f06474a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:47:27, skipping insertion in model container [2021-12-17 04:47:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:47:24" (2/3) ... [2021-12-17 04:47:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f06474a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:47:27, skipping insertion in model container [2021-12-17 04:47:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:47:27" (3/3) ... [2021-12-17 04:47:27,126 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2021-12-17 04:47:27,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:47:27,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:47:27,159 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:47:27,163 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 04:47:27,164 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:47:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 04:47:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 04:47:27,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:27,196 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 04:47:27,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2021-12-17 04:47:27,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:27,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547585196] [2021-12-17 04:47:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:27,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:27,443 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 04:47:27,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:27,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547585196] [2021-12-17 04:47:27,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547585196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:27,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:27,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:47:27,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44303209] [2021-12-17 04:47:27,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:27,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:27,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:27,473 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 04:47:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:29,173 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-17 04:47:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 04:47:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:29,185 INFO L225 Difference]: With dead ends: 1154 [2021-12-17 04:47:29,185 INFO L226 Difference]: Without dead ends: 665 [2021-12-17 04:47:29,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:29,191 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 258 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:29,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 04:47:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-17 04:47:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-17 04:47:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 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 04:47:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-17 04:47:29,237 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 63 [2021-12-17 04:47:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:29,237 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-17 04:47:29,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 04:47:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-17 04:47:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 04:47:29,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:29,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:47:29,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:47:29,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1758275575, now seen corresponding path program 1 times [2021-12-17 04:47:29,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:29,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982335074] [2021-12-17 04:47:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:29,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982335074] [2021-12-17 04:47:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982335074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:29,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:29,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:47:29,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857203272] [2021-12-17 04:47:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:29,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:29,377 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 04:47:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:30,683 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-17 04:47:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-17 04:47:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:30,687 INFO L225 Difference]: With dead ends: 1624 [2021-12-17 04:47:30,687 INFO L226 Difference]: Without dead ends: 963 [2021-12-17 04:47:30,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:30,690 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:30,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 04:47:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-17 04:47:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-17 04:47:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 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 04:47:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-17 04:47:30,711 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 128 [2021-12-17 04:47:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:30,711 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-17 04:47:30,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 04:47:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-17 04:47:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 04:47:30,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:30,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:47:30,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:47:30,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash -661680410, now seen corresponding path program 1 times [2021-12-17 04:47:30,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:30,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394813180] [2021-12-17 04:47:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:30,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:30,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394813180] [2021-12-17 04:47:30,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394813180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:30,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:30,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:47:30,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905530314] [2021-12-17 04:47:30,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:30,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 04:47:30,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 04:47:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:47:30,859 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 04:47:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:32,600 INFO L93 Difference]: Finished difference Result 2248 states and 3205 transitions. [2021-12-17 04:47:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:47:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-12-17 04:47:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:32,605 INFO L225 Difference]: With dead ends: 2248 [2021-12-17 04:47:32,605 INFO L226 Difference]: Without dead ends: 1586 [2021-12-17 04:47:32,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 04:47:32,610 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 398 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:32,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 339 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:47:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-12-17 04:47:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1266. [2021-12-17 04:47:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 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 04:47:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-17 04:47:32,635 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 133 [2021-12-17 04:47:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:32,635 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-17 04:47:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 04:47:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-17 04:47:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-17 04:47:32,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:32,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:47:32,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:47:32,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1251973378, now seen corresponding path program 1 times [2021-12-17 04:47:32,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761415354] [2021-12-17 04:47:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:32,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 04:47:32,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761415354] [2021-12-17 04:47:32,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761415354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:32,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:32,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:47:32,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441978001] [2021-12-17 04:47:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:32,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:32,716 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 04:47:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:33,897 INFO L93 Difference]: Finished difference Result 3436 states and 4550 transitions. [2021-12-17 04:47:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:33,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 229 [2021-12-17 04:47:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:33,903 INFO L225 Difference]: With dead ends: 3436 [2021-12-17 04:47:33,903 INFO L226 Difference]: Without dead ends: 2172 [2021-12-17 04:47:33,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:33,905 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:33,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:47:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-12-17 04:47:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2168. [2021-12-17 04:47:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 1.2344254730041533) internal successors, (2675), 2167 states have internal predecessors, (2675), 0 states have call successors, (0), 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 04:47:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2675 transitions. [2021-12-17 04:47:33,933 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2675 transitions. Word has length 229 [2021-12-17 04:47:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:33,934 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 2675 transitions. [2021-12-17 04:47:33,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 04:47:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2675 transitions. [2021-12-17 04:47:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-17 04:47:33,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:33,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:33,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:47:33,938 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash 138819748, now seen corresponding path program 1 times [2021-12-17 04:47:33,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:33,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563672575] [2021-12-17 04:47:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:33,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 04:47:34,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563672575] [2021-12-17 04:47:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563672575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:34,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:34,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:47:34,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363965228] [2021-12-17 04:47:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:34,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:34,107 INFO L87 Difference]: Start difference. First operand 2168 states and 2675 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 04:47:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:35,330 INFO L93 Difference]: Finished difference Result 4633 states and 5659 transitions. [2021-12-17 04:47:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 335 [2021-12-17 04:47:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:35,346 INFO L225 Difference]: With dead ends: 4633 [2021-12-17 04:47:35,346 INFO L226 Difference]: Without dead ends: 2467 [2021-12-17 04:47:35,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:35,349 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:35,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 04:47:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-12-17 04:47:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2467. [2021-12-17 04:47:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 1.208434712084347) internal successors, (2980), 2466 states have internal predecessors, (2980), 0 states have call successors, (0), 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 04:47:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 2980 transitions. [2021-12-17 04:47:35,380 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 2980 transitions. Word has length 335 [2021-12-17 04:47:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:35,381 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 2980 transitions. [2021-12-17 04:47:35,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 04:47:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 2980 transitions. [2021-12-17 04:47:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-17 04:47:35,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:35,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:35,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:47:35,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash 207476629, now seen corresponding path program 1 times [2021-12-17 04:47:35,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:35,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490585993] [2021-12-17 04:47:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:35,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 04:47:35,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490585993] [2021-12-17 04:47:35,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490585993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:35,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:35,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:47:35,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149503131] [2021-12-17 04:47:35,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:35,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:35,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:35,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:35,503 INFO L87 Difference]: Start difference. First operand 2467 states and 2980 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 04:47:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:36,755 INFO L93 Difference]: Finished difference Result 5232 states and 6542 transitions. [2021-12-17 04:47:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 350 [2021-12-17 04:47:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:36,763 INFO L225 Difference]: With dead ends: 5232 [2021-12-17 04:47:36,763 INFO L226 Difference]: Without dead ends: 3066 [2021-12-17 04:47:36,766 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 04:47:36,766 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 252 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:36,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 04:47:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-12-17 04:47:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2165. [2021-12-17 04:47:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 1.2310536044362292) internal successors, (2664), 2164 states have internal predecessors, (2664), 0 states have call successors, (0), 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 04:47:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 2664 transitions. [2021-12-17 04:47:36,797 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 2664 transitions. Word has length 350 [2021-12-17 04:47:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 2664 transitions. [2021-12-17 04:47:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 04:47:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 2664 transitions. [2021-12-17 04:47:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-17 04:47:36,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:36,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:47:36,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1092208046, now seen corresponding path program 1 times [2021-12-17 04:47:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711379031] [2021-12-17 04:47:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:36,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 04:47:36,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711379031] [2021-12-17 04:47:36,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711379031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:36,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:36,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:47:36,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95068744] [2021-12-17 04:47:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:36,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:36,928 INFO L87 Difference]: Start difference. First operand 2165 states and 2664 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 04:47:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:38,201 INFO L93 Difference]: Finished difference Result 5235 states and 6625 transitions. [2021-12-17 04:47:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 409 [2021-12-17 04:47:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:38,210 INFO L225 Difference]: With dead ends: 5235 [2021-12-17 04:47:38,210 INFO L226 Difference]: Without dead ends: 3371 [2021-12-17 04:47:38,212 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 04:47:38,215 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 265 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 04:47:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-12-17 04:47:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3072. [2021-12-17 04:47:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3071 states have (on average 1.1862585477043308) internal successors, (3643), 3071 states have internal predecessors, (3643), 0 states have call successors, (0), 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 04:47:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 3643 transitions. [2021-12-17 04:47:38,251 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 3643 transitions. Word has length 409 [2021-12-17 04:47:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 3643 transitions. [2021-12-17 04:47:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 04:47:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 3643 transitions. [2021-12-17 04:47:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-17 04:47:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:38,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:38,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:47:38,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash 303084745, now seen corresponding path program 1 times [2021-12-17 04:47:38,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814811707] [2021-12-17 04:47:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:38,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 121 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:38,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814811707] [2021-12-17 04:47:38,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814811707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:47:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022924557] [2021-12-17 04:47:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:38,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:38,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:38,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:47:38,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:47:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:38,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:47:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:47:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:39,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:47:39,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022924557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:39,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:47:39,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:47:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844370169] [2021-12-17 04:47:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:39,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:39,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:47:39,144 INFO L87 Difference]: Start difference. First operand 3072 states and 3643 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 04:47:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:40,301 INFO L93 Difference]: Finished difference Result 7049 states and 8586 transitions. [2021-12-17 04:47:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 414 [2021-12-17 04:47:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:40,312 INFO L225 Difference]: With dead ends: 7049 [2021-12-17 04:47:40,312 INFO L226 Difference]: Without dead ends: 4278 [2021-12-17 04:47:40,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:47:40,316 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 269 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:40,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 259 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:47:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-12-17 04:47:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3976. [2021-12-17 04:47:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 1.1781132075471699) internal successors, (4683), 3975 states have internal predecessors, (4683), 0 states have call successors, (0), 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 04:47:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 4683 transitions. [2021-12-17 04:47:40,359 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 4683 transitions. Word has length 414 [2021-12-17 04:47:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:40,359 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 4683 transitions. [2021-12-17 04:47:40,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 04:47:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 4683 transitions. [2021-12-17 04:47:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-17 04:47:40,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:40,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:47:40,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:47:40,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:40,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 267158821, now seen corresponding path program 1 times [2021-12-17 04:47:40,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:40,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083666151] [2021-12-17 04:47:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:40,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 04:47:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:40,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083666151] [2021-12-17 04:47:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083666151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:40,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:40,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:47:40,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945173378] [2021-12-17 04:47:40,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:40,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:40,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:40,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:40,669 INFO L87 Difference]: Start difference. First operand 3976 states and 4683 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 04:47:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:41,817 INFO L93 Difference]: Finished difference Result 8848 states and 10657 transitions. [2021-12-17 04:47:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 432 [2021-12-17 04:47:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:41,829 INFO L225 Difference]: With dead ends: 8848 [2021-12-17 04:47:41,829 INFO L226 Difference]: Without dead ends: 5173 [2021-12-17 04:47:41,832 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 04:47:41,833 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 246 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:41,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 620 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:47:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2021-12-17 04:47:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 4873. [2021-12-17 04:47:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4872 states have (on average 1.1633825944170773) internal successors, (5668), 4872 states have internal predecessors, (5668), 0 states have call successors, (0), 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 04:47:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 5668 transitions. [2021-12-17 04:47:41,886 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 5668 transitions. Word has length 432 [2021-12-17 04:47:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:41,886 INFO L470 AbstractCegarLoop]: Abstraction has 4873 states and 5668 transitions. [2021-12-17 04:47:41,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 04:47:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 5668 transitions. [2021-12-17 04:47:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-12-17 04:47:41,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:41,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:41,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:47:41,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2057557162, now seen corresponding path program 1 times [2021-12-17 04:47:41,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:41,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383142727] [2021-12-17 04:47:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:41,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 531 proven. 39 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-12-17 04:47:42,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383142727] [2021-12-17 04:47:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383142727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:47:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826551216] [2021-12-17 04:47:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:42,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:42,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:47:42,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:47:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:47:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:47:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-17 04:47:42,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:47:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826551216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:42,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:47:42,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:47:42,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276790203] [2021-12-17 04:47:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:42,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:47:42,860 INFO L87 Difference]: Start difference. First operand 4873 states and 5668 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 04:47:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:44,401 INFO L93 Difference]: Finished difference Result 10939 states and 13016 transitions. [2021-12-17 04:47:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 547 [2021-12-17 04:47:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:44,417 INFO L225 Difference]: With dead ends: 10939 [2021-12-17 04:47:44,417 INFO L226 Difference]: Without dead ends: 6367 [2021-12-17 04:47:44,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:47:44,422 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 356 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:44,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 449 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 04:47:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2021-12-17 04:47:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2021-12-17 04:47:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 1.1842601319509896) internal successors, (7539), 6366 states have internal predecessors, (7539), 0 states have call successors, (0), 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 04:47:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 7539 transitions. [2021-12-17 04:47:44,532 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 7539 transitions. Word has length 547 [2021-12-17 04:47:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:44,532 INFO L470 AbstractCegarLoop]: Abstraction has 6367 states and 7539 transitions. [2021-12-17 04:47:44,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 04:47:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 7539 transitions. [2021-12-17 04:47:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-12-17 04:47:44,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:44,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:44,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:47:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 04:47:44,756 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1484596940, now seen corresponding path program 1 times [2021-12-17 04:47:44,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292673886] [2021-12-17 04:47:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-17 04:47:44,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292673886] [2021-12-17 04:47:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292673886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:44,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:47:44,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:47:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101476786] [2021-12-17 04:47:44,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:44,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:44,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:47:44,914 INFO L87 Difference]: Start difference. First operand 6367 states and 7539 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 04:47:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:46,384 INFO L93 Difference]: Finished difference Result 17231 states and 20507 transitions. [2021-12-17 04:47:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 551 [2021-12-17 04:47:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:46,414 INFO L225 Difference]: With dead ends: 17231 [2021-12-17 04:47:46,415 INFO L226 Difference]: Without dead ends: 11165 [2021-12-17 04:47:46,421 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 04:47:46,421 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 246 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:46,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 623 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 04:47:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11165 states. [2021-12-17 04:47:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11165 to 10855. [2021-12-17 04:47:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10855 states, 10854 states have (on average 1.1451077943615258) internal successors, (12429), 10854 states have internal predecessors, (12429), 0 states have call successors, (0), 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 04:47:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10855 states to 10855 states and 12429 transitions. [2021-12-17 04:47:46,546 INFO L78 Accepts]: Start accepts. Automaton has 10855 states and 12429 transitions. Word has length 551 [2021-12-17 04:47:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 10855 states and 12429 transitions. [2021-12-17 04:47:46,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 04:47:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10855 states and 12429 transitions. [2021-12-17 04:47:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2021-12-17 04:47:46,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:46,554 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:46,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:47:46,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:46,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1916124293, now seen corresponding path program 1 times [2021-12-17 04:47:46,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:46,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547449889] [2021-12-17 04:47:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:46,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 401 proven. 268 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 04:47:46,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547449889] [2021-12-17 04:47:46,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547449889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:47:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316583322] [2021-12-17 04:47:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:46,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:46,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:47:46,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:47:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:47:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:47:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-17 04:47:47,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:47:47,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316583322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:47:47,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:47:47,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 04:47:47,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869640574] [2021-12-17 04:47:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:47:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:47:47,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:47:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:47:47,559 INFO L87 Difference]: Start difference. First operand 10855 states and 12429 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 04:47:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:48,741 INFO L93 Difference]: Finished difference Result 21411 states and 24555 transitions. [2021-12-17 04:47:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:47:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 606 [2021-12-17 04:47:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:48,756 INFO L225 Difference]: With dead ends: 21411 [2021-12-17 04:47:48,756 INFO L226 Difference]: Without dead ends: 10857 [2021-12-17 04:47:48,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:47:48,765 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 310 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 447 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:47:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10857 states. [2021-12-17 04:47:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10857 to 10852. [2021-12-17 04:47:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 10851 states have (on average 1.1311399870979633) internal successors, (12274), 10851 states have internal predecessors, (12274), 0 states have call successors, (0), 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 04:47:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 12274 transitions. [2021-12-17 04:47:48,865 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 12274 transitions. Word has length 606 [2021-12-17 04:47:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:48,866 INFO L470 AbstractCegarLoop]: Abstraction has 10852 states and 12274 transitions. [2021-12-17 04:47:48,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 04:47:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 12274 transitions. [2021-12-17 04:47:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-17 04:47:48,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:48,873 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:47:48,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:47:49,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:49,091 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:49,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1632467113, now seen corresponding path program 1 times [2021-12-17 04:47:49,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013117892] [2021-12-17 04:47:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:49,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 615 proven. 39 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-17 04:47:49,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013117892] [2021-12-17 04:47:49,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013117892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:47:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502526496] [2021-12-17 04:47:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:49,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:49,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:49,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:47:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 04:47:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 04:47:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:47:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 615 proven. 39 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-17 04:47:50,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:47:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 615 proven. 39 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-17 04:47:51,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502526496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 04:47:51,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 04:47:51,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-17 04:47:51,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572529543] [2021-12-17 04:47:51,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 04:47:51,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 04:47:51,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:47:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 04:47:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 04:47:51,945 INFO L87 Difference]: Start difference. First operand 10852 states and 12274 transitions. Second operand has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 04:47:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:47:56,503 INFO L93 Difference]: Finished difference Result 28840 states and 32462 transitions. [2021-12-17 04:47:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 04:47:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 627 [2021-12-17 04:47:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:47:56,521 INFO L225 Difference]: With dead ends: 28840 [2021-12-17 04:47:56,521 INFO L226 Difference]: Without dead ends: 12946 [2021-12-17 04:47:56,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1249 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-17 04:47:56,532 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 3319 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:47:56,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3319 Valid, 205 Invalid, 5805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 04:47:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12946 states. [2021-12-17 04:47:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12946 to 10252. [2021-12-17 04:47:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10252 states, 10251 states have (on average 1.0618476246219881) internal successors, (10885), 10251 states have internal predecessors, (10885), 0 states have call successors, (0), 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 04:47:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10252 states to 10252 states and 10885 transitions. [2021-12-17 04:47:56,633 INFO L78 Accepts]: Start accepts. Automaton has 10252 states and 10885 transitions. Word has length 627 [2021-12-17 04:47:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:47:56,633 INFO L470 AbstractCegarLoop]: Abstraction has 10252 states and 10885 transitions. [2021-12-17 04:47:56,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 04:47:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10252 states and 10885 transitions. [2021-12-17 04:47:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-12-17 04:47:56,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:47:56,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:47:56,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 04:47:56,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:56,856 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:47:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:47:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1939287860, now seen corresponding path program 1 times [2021-12-17 04:47:56,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:47:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122467581] [2021-12-17 04:47:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:56,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:47:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 266 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:57,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:47:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122467581] [2021-12-17 04:47:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122467581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:47:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030267062] [2021-12-17 04:47:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:47:57,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:47:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:47:57,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:47:57,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 04:47:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:47:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 04:47:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:47:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 450 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:47:58,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:48:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 450 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:48:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030267062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 04:48:00,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 04:48:00,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-17 04:48:00,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226267174] [2021-12-17 04:48:00,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 04:48:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 04:48:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 04:48:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 04:48:00,137 INFO L87 Difference]: Start difference. First operand 10252 states and 10885 transitions. Second operand has 12 states, 12 states have (on average 143.33333333333334) internal successors, (1720), 12 states have internal predecessors, (1720), 0 states have call successors, (0), 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 04:48:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:09,834 INFO L93 Difference]: Finished difference Result 37289 states and 39681 transitions. [2021-12-17 04:48:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 04:48:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 143.33333333333334) internal successors, (1720), 12 states have internal predecessors, (1720), 0 states have call successors, (0), 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 664 [2021-12-17 04:48:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:09,863 INFO L225 Difference]: With dead ends: 37289 [2021-12-17 04:48:09,863 INFO L226 Difference]: Without dead ends: 26432 [2021-12-17 04:48:09,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1363 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=591, Invalid=2489, Unknown=0, NotChecked=0, Total=3080 [2021-12-17 04:48:09,875 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 5723 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 13479 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5723 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 14928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 13479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:09,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5723 Valid, 429 Invalid, 14928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 13479 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-12-17 04:48:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26432 states. [2021-12-17 04:48:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26432 to 19553. [2021-12-17 04:48:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19553 states, 19552 states have (on average 1.0559022094926351) internal successors, (20645), 19552 states have internal predecessors, (20645), 0 states have call successors, (0), 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 04:48:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19553 states to 19553 states and 20645 transitions. [2021-12-17 04:48:10,118 INFO L78 Accepts]: Start accepts. Automaton has 19553 states and 20645 transitions. Word has length 664 [2021-12-17 04:48:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 19553 states and 20645 transitions. [2021-12-17 04:48:10,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.33333333333334) internal successors, (1720), 12 states have internal predecessors, (1720), 0 states have call successors, (0), 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 04:48:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19553 states and 20645 transitions. [2021-12-17 04:48:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2021-12-17 04:48:10,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:10,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:48:10,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 04:48:10,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 04:48:10,343 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1642869698, now seen corresponding path program 1 times [2021-12-17 04:48:10,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572428692] [2021-12-17 04:48:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:10,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-12-17 04:48:10,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572428692] [2021-12-17 04:48:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572428692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:48:10,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:48:10,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:48:10,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339123045] [2021-12-17 04:48:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:48:10,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:48:10,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:48:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:48:10,496 INFO L87 Difference]: Start difference. First operand 19553 states and 20645 transitions. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 04:48:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:11,316 INFO L93 Difference]: Finished difference Result 38803 states and 40997 transitions. [2021-12-17 04:48:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:48:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 731 [2021-12-17 04:48:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:11,334 INFO L225 Difference]: With dead ends: 38803 [2021-12-17 04:48:11,334 INFO L226 Difference]: Without dead ends: 19850 [2021-12-17 04:48:11,345 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 04:48:11,347 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:11,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:48:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19850 states. [2021-12-17 04:48:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19850 to 19551. [2021-12-17 04:48:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19551 states, 19550 states have (on average 1.0558056265984654) internal successors, (20641), 19550 states have internal predecessors, (20641), 0 states have call successors, (0), 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 04:48:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19551 states to 19551 states and 20641 transitions. [2021-12-17 04:48:11,515 INFO L78 Accepts]: Start accepts. Automaton has 19551 states and 20641 transitions. Word has length 731 [2021-12-17 04:48:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:11,516 INFO L470 AbstractCegarLoop]: Abstraction has 19551 states and 20641 transitions. [2021-12-17 04:48:11,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 04:48:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 19551 states and 20641 transitions. [2021-12-17 04:48:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2021-12-17 04:48:11,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:11,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:48:11,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:48:11,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash 549698773, now seen corresponding path program 1 times [2021-12-17 04:48:11,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770014404] [2021-12-17 04:48:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:11,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 679 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-17 04:48:11,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:11,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770014404] [2021-12-17 04:48:11,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770014404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:48:11,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:48:11,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:48:11,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771175029] [2021-12-17 04:48:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:48:11,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:48:11,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:11,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:48:11,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:48:11,697 INFO L87 Difference]: Start difference. First operand 19551 states and 20641 transitions. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 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 04:48:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:12,586 INFO L93 Difference]: Finished difference Result 41484 states and 43785 transitions. [2021-12-17 04:48:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:48:12,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 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 784 [2021-12-17 04:48:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:12,608 INFO L225 Difference]: With dead ends: 41484 [2021-12-17 04:48:12,608 INFO L226 Difference]: Without dead ends: 22533 [2021-12-17 04:48:12,620 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 04:48:12,621 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:12,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 530 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 04:48:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22533 states. [2021-12-17 04:48:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22533 to 19238. [2021-12-17 04:48:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19238 states, 19237 states have (on average 1.0450174143577482) internal successors, (20103), 19237 states have internal predecessors, (20103), 0 states have call successors, (0), 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 04:48:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19238 states to 19238 states and 20103 transitions. [2021-12-17 04:48:12,797 INFO L78 Accepts]: Start accepts. Automaton has 19238 states and 20103 transitions. Word has length 784 [2021-12-17 04:48:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 19238 states and 20103 transitions. [2021-12-17 04:48:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 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 04:48:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 19238 states and 20103 transitions. [2021-12-17 04:48:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2021-12-17 04:48:12,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:12,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:48:12,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:48:12,810 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash -742008494, now seen corresponding path program 1 times [2021-12-17 04:48:12,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:12,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522460776] [2021-12-17 04:48:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:12,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-12-17 04:48:13,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:13,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522460776] [2021-12-17 04:48:13,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522460776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:48:13,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:48:13,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:48:13,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330049664] [2021-12-17 04:48:13,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:48:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:48:13,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:48:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:48:13,005 INFO L87 Difference]: Start difference. First operand 19238 states and 20103 transitions. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 04:48:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:13,776 INFO L93 Difference]: Finished difference Result 39953 states and 41831 transitions. [2021-12-17 04:48:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:48:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 813 [2021-12-17 04:48:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:13,793 INFO L225 Difference]: With dead ends: 39953 [2021-12-17 04:48:13,794 INFO L226 Difference]: Without dead ends: 21315 [2021-12-17 04:48:13,805 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 04:48:13,806 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 341 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:13,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 463 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:48:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21315 states. [2021-12-17 04:48:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21315 to 20119. [2021-12-17 04:48:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20119 states, 20118 states have (on average 1.0414057063326374) internal successors, (20951), 20118 states have internal predecessors, (20951), 0 states have call successors, (0), 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 04:48:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20119 states to 20119 states and 20951 transitions. [2021-12-17 04:48:13,976 INFO L78 Accepts]: Start accepts. Automaton has 20119 states and 20951 transitions. Word has length 813 [2021-12-17 04:48:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:13,977 INFO L470 AbstractCegarLoop]: Abstraction has 20119 states and 20951 transitions. [2021-12-17 04:48:13,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 04:48:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20119 states and 20951 transitions. [2021-12-17 04:48:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2021-12-17 04:48:13,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:13,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:48:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:48:13,988 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash 617162270, now seen corresponding path program 1 times [2021-12-17 04:48:13,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808833469] [2021-12-17 04:48:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:13,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 946 proven. 263 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-17 04:48:14,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808833469] [2021-12-17 04:48:14,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808833469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:48:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278214286] [2021-12-17 04:48:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:14,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:48:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:48:14,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:48:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 04:48:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 04:48:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:48:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 991 proven. 266 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-17 04:48:46,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:48:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 803 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-12-17 04:48:47,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278214286] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 04:48:47,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 04:48:47,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 10 [2021-12-17 04:48:47,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547685349] [2021-12-17 04:48:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:48:47,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:48:47,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:48:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2021-12-17 04:48:47,367 INFO L87 Difference]: Start difference. First operand 20119 states and 20951 transitions. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 04:48:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:48,253 INFO L93 Difference]: Finished difference Result 33021 states and 34229 transitions. [2021-12-17 04:48:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:48:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 881 [2021-12-17 04:48:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:48,266 INFO L225 Difference]: With dead ends: 33021 [2021-12-17 04:48:48,267 INFO L226 Difference]: Without dead ends: 13502 [2021-12-17 04:48:48,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1766 GetRequests, 1758 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2021-12-17 04:48:48,277 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 170 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:48,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 74 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 04:48:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-12-17 04:48:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 11999. [2021-12-17 04:48:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11999 states, 11998 states have (on average 1.0277546257709618) internal successors, (12331), 11998 states have internal predecessors, (12331), 0 states have call successors, (0), 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 04:48:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11999 states to 11999 states and 12331 transitions. [2021-12-17 04:48:48,406 INFO L78 Accepts]: Start accepts. Automaton has 11999 states and 12331 transitions. Word has length 881 [2021-12-17 04:48:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:48,407 INFO L470 AbstractCegarLoop]: Abstraction has 11999 states and 12331 transitions. [2021-12-17 04:48:48,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 04:48:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11999 states and 12331 transitions. [2021-12-17 04:48:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2021-12-17 04:48:48,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:48,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:48:48,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 04:48:48,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 04:48:48,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -991976836, now seen corresponding path program 1 times [2021-12-17 04:48:48,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414679304] [2021-12-17 04:48:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:48,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 658 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-12-17 04:48:48,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:48,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414679304] [2021-12-17 04:48:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414679304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:48:48,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:48:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:48:48,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406433464] [2021-12-17 04:48:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:48:48,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:48:48,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:48:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:48:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:48:48,864 INFO L87 Difference]: Start difference. First operand 11999 states and 12331 transitions. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 04:48:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:48:50,118 INFO L93 Difference]: Finished difference Result 17696 states and 18154 transitions. [2021-12-17 04:48:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:48:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 881 [2021-12-17 04:48:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:48:50,135 INFO L225 Difference]: With dead ends: 17696 [2021-12-17 04:48:50,135 INFO L226 Difference]: Without dead ends: 17694 [2021-12-17 04:48:50,140 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 04:48:50,140 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 448 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:48:50,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 67 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 04:48:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17694 states. [2021-12-17 04:48:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17694 to 11700. [2021-12-17 04:48:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11700 states, 11699 states have (on average 1.0273527651936063) internal successors, (12019), 11699 states have internal predecessors, (12019), 0 states have call successors, (0), 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 04:48:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11700 states to 11700 states and 12019 transitions. [2021-12-17 04:48:50,249 INFO L78 Accepts]: Start accepts. Automaton has 11700 states and 12019 transitions. Word has length 881 [2021-12-17 04:48:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:48:50,249 INFO L470 AbstractCegarLoop]: Abstraction has 11700 states and 12019 transitions. [2021-12-17 04:48:50,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 04:48:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11700 states and 12019 transitions. [2021-12-17 04:48:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2021-12-17 04:48:50,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:48:50,264 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:48:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 04:48:50,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:48:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:48:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 64552909, now seen corresponding path program 1 times [2021-12-17 04:48:50,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:48:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397226766] [2021-12-17 04:48:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:50,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:48:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-17 04:48:51,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:48:51,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397226766] [2021-12-17 04:48:51,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397226766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:48:51,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056131890] [2021-12-17 04:48:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:48:51,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:48:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:48:51,020 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:48:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 04:48:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:48:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 04:48:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15