./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem10_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem10_label50.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 e06ef1412a74393ad84e9e1ded9df4a85465ae72dfa72ae2b083f3676b944dcb --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:34:42,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:34:42,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:34:42,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:34:42,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:34:42,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:34:42,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:34:42,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:34:42,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:34:42,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:34:42,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:34:42,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:34:42,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:34:42,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:34:42,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:34:42,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:34:42,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:34:42,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:34:42,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:34:42,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:34:42,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:34:42,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:34:42,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:34:42,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:34:42,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:34:42,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:34:42,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:34:42,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:34:42,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:34:42,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:34:42,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:34:42,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:34:42,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:34:42,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:34:42,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:34:42,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:34:42,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:34:42,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:34:42,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:34:42,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:34:42,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:34:42,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:34:42,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:34:42,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:34:42,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:34:42,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:34:42,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:34:42,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:34:42,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:34:42,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:34:42,986 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:34:42,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:34:42,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:34:42,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:34:42,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:34:42,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:34:42,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:34:42,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:34:42,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:34:42,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:34:42,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:34:42,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:34:42,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:34:42,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:34:42,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:34:42,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:34:42,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:34:42,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:34:42,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:34:42,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:34:42,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e06ef1412a74393ad84e9e1ded9df4a85465ae72dfa72ae2b083f3676b944dcb [2021-12-15 09:34:43,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:34:43,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:34:43,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:34:43,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:34:43,188 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:34:43,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem10_label50.c [2021-12-15 09:34:43,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e148f17f/c48ab19993f64d21be22678a6bb1a013/FLAG4ae855c2d [2021-12-15 09:34:43,630 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:34:43,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem10_label50.c [2021-12-15 09:34:43,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e148f17f/c48ab19993f64d21be22678a6bb1a013/FLAG4ae855c2d [2021-12-15 09:34:43,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e148f17f/c48ab19993f64d21be22678a6bb1a013 [2021-12-15 09:34:43,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:34:43,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:34:43,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:34:43,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:34:43,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:34:43,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:34:43" (1/1) ... [2021-12-15 09:34:43,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e30e54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:43, skipping insertion in model container [2021-12-15 09:34:43,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:34:43" (1/1) ... [2021-12-15 09:34:43,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:34:43,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:34:43,835 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/Problem10_label50.c[1307,1320] [2021-12-15 09:34:43,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:34:43,990 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:34:44,003 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/Problem10_label50.c[1307,1320] [2021-12-15 09:34:44,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:34:44,068 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:34:44,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44 WrapperNode [2021-12-15 09:34:44,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:34:44,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:34:44,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:34:44,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:34:44,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,139 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 597 [2021-12-15 09:34:44,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:34:44,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:34:44,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:34:44,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:34:44,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:34:44,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:34:44,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:34:44,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:34:44,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (1/1) ... [2021-12-15 09:34:44,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:34:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:34:44,227 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) [2021-12-15 09:34:44,245 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 [2021-12-15 09:34:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:34:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:34:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:34:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:34:44,305 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:34:44,306 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:34:45,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:34:45,084 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:34:45,084 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:34:45,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:34:45 BoogieIcfgContainer [2021-12-15 09:34:45,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:34:45,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:34:45,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:34:45,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:34:45,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:34:43" (1/3) ... [2021-12-15 09:34:45,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664b4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:34:45, skipping insertion in model container [2021-12-15 09:34:45,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:44" (2/3) ... [2021-12-15 09:34:45,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664b4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:34:45, skipping insertion in model container [2021-12-15 09:34:45,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:34:45" (3/3) ... [2021-12-15 09:34:45,092 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label50.c [2021-12-15 09:34:45,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:34:45,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:34:45,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:34:45,140 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 [2021-12-15 09:34:45,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:34:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 204 states have (on average 1.6862745098039216) internal successors, (344), 205 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 09:34:45,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:45,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:45,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-12-15 09:34:45,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100688977] [2021-12-15 09:34:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:45,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:45,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100688977] [2021-12-15 09:34:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100688977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:45,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:45,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:34:45,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705682485] [2021-12-15 09:34:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:45,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:45,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:45,313 INFO L87 Difference]: Start difference. First operand has 206 states, 204 states have (on average 1.6862745098039216) internal successors, (344), 205 states have internal predecessors, (344), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:45,899 INFO L93 Difference]: Finished difference Result 552 states and 966 transitions. [2021-12-15 09:34:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:45,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-15 09:34:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:45,916 INFO L225 Difference]: With dead ends: 552 [2021-12-15 09:34:45,916 INFO L226 Difference]: Without dead ends: 282 [2021-12-15 09:34:45,922 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 [2021-12-15 09:34:45,925 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:45,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 76 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:34:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-15 09:34:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-12-15 09:34:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.5373665480427046) internal successors, (432), 281 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 432 transitions. [2021-12-15 09:34:45,961 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 432 transitions. Word has length 9 [2021-12-15 09:34:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:45,961 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 432 transitions. [2021-12-15 09:34:45,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 432 transitions. [2021-12-15 09:34:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 09:34:45,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:45,964 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:34:45,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:34:45,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1553241361, now seen corresponding path program 1 times [2021-12-15 09:34:45,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529867988] [2021-12-15 09:34:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:45,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:46,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:46,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529867988] [2021-12-15 09:34:46,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529867988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:46,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:46,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:34:46,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17750671] [2021-12-15 09:34:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:46,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:46,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:46,066 INFO L87 Difference]: Start difference. First operand 282 states and 432 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:46,438 INFO L93 Difference]: Finished difference Result 701 states and 1076 transitions. [2021-12-15 09:34:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-15 09:34:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:46,440 INFO L225 Difference]: With dead ends: 701 [2021-12-15 09:34:46,441 INFO L226 Difference]: Without dead ends: 421 [2021-12-15 09:34:46,441 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 [2021-12-15 09:34:46,442 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:46,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 52 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:34:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-15 09:34:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-12-15 09:34:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.4428571428571428) internal successors, (606), 420 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 606 transitions. [2021-12-15 09:34:46,454 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 606 transitions. Word has length 78 [2021-12-15 09:34:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 606 transitions. [2021-12-15 09:34:46,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 606 transitions. [2021-12-15 09:34:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 09:34:46,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:46,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:46,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:34:46,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash 422285312, now seen corresponding path program 1 times [2021-12-15 09:34:46,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210481410] [2021-12-15 09:34:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:46,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:46,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210481410] [2021-12-15 09:34:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210481410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:46,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280784726] [2021-12-15 09:34:46,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:46,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:46,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:46,514 INFO L87 Difference]: Start difference. First operand 421 states and 606 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:46,875 INFO L93 Difference]: Finished difference Result 1118 states and 1639 transitions. [2021-12-15 09:34:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-15 09:34:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:46,878 INFO L225 Difference]: With dead ends: 1118 [2021-12-15 09:34:46,878 INFO L226 Difference]: Without dead ends: 838 [2021-12-15 09:34:46,879 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 [2021-12-15 09:34:46,880 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 133 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:46,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 226 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-15 09:34:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 699. [2021-12-15 09:34:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.330945558739255) internal successors, (929), 698 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 929 transitions. [2021-12-15 09:34:46,906 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 929 transitions. Word has length 84 [2021-12-15 09:34:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:46,907 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 929 transitions. [2021-12-15 09:34:46,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 929 transitions. [2021-12-15 09:34:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 09:34:46,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:46,909 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:34:46,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:34:46,910 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash 550866738, now seen corresponding path program 1 times [2021-12-15 09:34:46,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545195018] [2021-12-15 09:34:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:46,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:47,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545195018] [2021-12-15 09:34:47,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545195018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:47,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:47,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:47,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725856129] [2021-12-15 09:34:47,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:47,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:34:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:34:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:34:47,024 INFO L87 Difference]: Start difference. First operand 699 states and 929 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:47,454 INFO L93 Difference]: Finished difference Result 1129 states and 1544 transitions. [2021-12-15 09:34:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:34:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-15 09:34:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:47,456 INFO L225 Difference]: With dead ends: 1129 [2021-12-15 09:34:47,456 INFO L226 Difference]: Without dead ends: 571 [2021-12-15 09:34:47,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:34:47,458 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:47,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 92 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:34:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-15 09:34:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 560. [2021-12-15 09:34:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.3416815742397137) internal successors, (750), 559 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) [2021-12-15 09:34:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 750 transitions. [2021-12-15 09:34:47,466 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 750 transitions. Word has length 103 [2021-12-15 09:34:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:47,467 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 750 transitions. [2021-12-15 09:34:47,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 750 transitions. [2021-12-15 09:34:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-15 09:34:47,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:47,469 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:47,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:34:47,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2132078718, now seen corresponding path program 1 times [2021-12-15 09:34:47,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269768749] [2021-12-15 09:34:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:47,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-15 09:34:47,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269768749] [2021-12-15 09:34:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269768749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:47,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:47,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:34:47,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447081732] [2021-12-15 09:34:47,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:47,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:47,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:47,530 INFO L87 Difference]: Start difference. First operand 560 states and 750 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:47,878 INFO L93 Difference]: Finished difference Result 1257 states and 1742 transitions. [2021-12-15 09:34:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 144 [2021-12-15 09:34:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:47,882 INFO L225 Difference]: With dead ends: 1257 [2021-12-15 09:34:47,882 INFO L226 Difference]: Without dead ends: 838 [2021-12-15 09:34:47,883 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 [2021-12-15 09:34:47,889 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:47,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 34 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-15 09:34:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2021-12-15 09:34:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.2759856630824373) internal successors, (1068), 837 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1068 transitions. [2021-12-15 09:34:47,903 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1068 transitions. Word has length 144 [2021-12-15 09:34:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:47,904 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1068 transitions. [2021-12-15 09:34:47,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1068 transitions. [2021-12-15 09:34:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-15 09:34:47,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:47,912 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:47,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:34:47,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash -627353775, now seen corresponding path program 1 times [2021-12-15 09:34:47,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:47,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589783264] [2021-12-15 09:34:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:47,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:48,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589783264] [2021-12-15 09:34:48,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589783264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:48,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:48,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104048687] [2021-12-15 09:34:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:48,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:48,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:48,012 INFO L87 Difference]: Start difference. First operand 838 states and 1068 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:48,346 INFO L93 Difference]: Finished difference Result 1813 states and 2369 transitions. [2021-12-15 09:34:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-12-15 09:34:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:48,349 INFO L225 Difference]: With dead ends: 1813 [2021-12-15 09:34:48,349 INFO L226 Difference]: Without dead ends: 1116 [2021-12-15 09:34:48,350 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 [2021-12-15 09:34:48,352 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:48,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 214 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-12-15 09:34:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1116. [2021-12-15 09:34:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.2260089686098654) internal successors, (1367), 1115 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1367 transitions. [2021-12-15 09:34:48,375 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1367 transitions. Word has length 161 [2021-12-15 09:34:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:48,375 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1367 transitions. [2021-12-15 09:34:48,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1367 transitions. [2021-12-15 09:34:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-15 09:34:48,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:48,377 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:34:48,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:48,378 INFO L85 PathProgramCache]: Analyzing trace with hash -271102904, now seen corresponding path program 1 times [2021-12-15 09:34:48,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:48,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494800830] [2021-12-15 09:34:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:48,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-15 09:34:48,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494800830] [2021-12-15 09:34:48,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494800830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:48,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:48,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:48,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299033791] [2021-12-15 09:34:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:48,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:48,440 INFO L87 Difference]: Start difference. First operand 1116 states and 1367 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:48,776 INFO L93 Difference]: Finished difference Result 2369 states and 2967 transitions. [2021-12-15 09:34:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:48,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 183 [2021-12-15 09:34:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:48,781 INFO L225 Difference]: With dead ends: 2369 [2021-12-15 09:34:48,781 INFO L226 Difference]: Without dead ends: 1394 [2021-12-15 09:34:48,782 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 [2021-12-15 09:34:48,782 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:48,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 77 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-12-15 09:34:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1255. [2021-12-15 09:34:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 1.1650717703349283) internal successors, (1461), 1254 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1461 transitions. [2021-12-15 09:34:48,799 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1461 transitions. Word has length 183 [2021-12-15 09:34:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:48,799 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1461 transitions. [2021-12-15 09:34:48,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1461 transitions. [2021-12-15 09:34:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 09:34:48,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:48,802 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:48,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:34:48,802 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:48,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1086428008, now seen corresponding path program 1 times [2021-12-15 09:34:48,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953969518] [2021-12-15 09:34:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:48,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:48,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953969518] [2021-12-15 09:34:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953969518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:49,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 09:34:49,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652012505] [2021-12-15 09:34:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:49,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 09:34:49,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:49,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 09:34:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:34:49,001 INFO L87 Difference]: Start difference. First operand 1255 states and 1461 transitions. Second operand has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:49,531 INFO L93 Difference]: Finished difference Result 2424 states and 2831 transitions. [2021-12-15 09:34:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 09:34:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-15 09:34:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:49,535 INFO L225 Difference]: With dead ends: 2424 [2021-12-15 09:34:49,535 INFO L226 Difference]: Without dead ends: 1255 [2021-12-15 09:34:49,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:34:49,537 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:49,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 30 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:34:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-12-15 09:34:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2021-12-15 09:34:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 1.161084529505582) internal successors, (1456), 1254 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1456 transitions. [2021-12-15 09:34:49,554 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1456 transitions. Word has length 216 [2021-12-15 09:34:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:49,554 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1456 transitions. [2021-12-15 09:34:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.857142857142858) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1456 transitions. [2021-12-15 09:34:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 09:34:49,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:49,557 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:49,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:34:49,557 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2104357582, now seen corresponding path program 1 times [2021-12-15 09:34:49,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:49,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845671517] [2021-12-15 09:34:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:49,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:49,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845671517] [2021-12-15 09:34:49,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845671517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:49,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:49,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:49,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097679913] [2021-12-15 09:34:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:49,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:34:49,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:34:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:34:49,721 INFO L87 Difference]: Start difference. First operand 1255 states and 1456 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:50,452 INFO L93 Difference]: Finished difference Result 4178 states and 4923 transitions. [2021-12-15 09:34:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:34:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-12-15 09:34:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:50,460 INFO L225 Difference]: With dead ends: 4178 [2021-12-15 09:34:50,460 INFO L226 Difference]: Without dead ends: 3064 [2021-12-15 09:34:50,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:34:50,463 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 55 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:50,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:34:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-12-15 09:34:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2784. [2021-12-15 09:34:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 1.15199425080848) internal successors, (3206), 2783 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3206 transitions. [2021-12-15 09:34:50,525 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3206 transitions. Word has length 252 [2021-12-15 09:34:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:50,526 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 3206 transitions. [2021-12-15 09:34:50,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3206 transitions. [2021-12-15 09:34:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-15 09:34:50,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:50,529 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:34:50,529 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 171228312, now seen corresponding path program 1 times [2021-12-15 09:34:50,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935473951] [2021-12-15 09:34:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:50,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:34:50,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:50,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935473951] [2021-12-15 09:34:50,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935473951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:50,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:50,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:34:50,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103429525] [2021-12-15 09:34:50,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:50,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:34:50,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:34:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:34:50,606 INFO L87 Difference]: Start difference. First operand 2784 states and 3206 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:51,056 INFO L93 Difference]: Finished difference Result 5705 states and 6595 transitions. [2021-12-15 09:34:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:34:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 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 257 [2021-12-15 09:34:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:51,064 INFO L225 Difference]: With dead ends: 5705 [2021-12-15 09:34:51,065 INFO L226 Difference]: Without dead ends: 3062 [2021-12-15 09:34:51,068 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 [2021-12-15 09:34:51,068 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 235 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:51,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 198 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:34:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-12-15 09:34:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2089. [2021-12-15 09:34:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 1.1336206896551724) internal successors, (2367), 2088 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2367 transitions. [2021-12-15 09:34:51,102 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2367 transitions. Word has length 257 [2021-12-15 09:34:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:51,102 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 2367 transitions. [2021-12-15 09:34:51,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2367 transitions. [2021-12-15 09:34:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-15 09:34:51,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:51,105 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:51,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:34:51,106 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2099230470, now seen corresponding path program 1 times [2021-12-15 09:34:51,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:51,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95936957] [2021-12-15 09:34:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:51,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 09:34:51,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:51,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95936957] [2021-12-15 09:34:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95936957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:51,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:51,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:51,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089319034] [2021-12-15 09:34:51,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:51,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:51,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:51,168 INFO L87 Difference]: Start difference. First operand 2089 states and 2367 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:51,504 INFO L93 Difference]: Finished difference Result 4454 states and 5130 transitions. [2021-12-15 09:34:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 257 [2021-12-15 09:34:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:51,522 INFO L225 Difference]: With dead ends: 4454 [2021-12-15 09:34:51,522 INFO L226 Difference]: Without dead ends: 2506 [2021-12-15 09:34:51,523 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 [2021-12-15 09:34:51,524 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 133 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:51,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 225 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-12-15 09:34:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2228. [2021-12-15 09:34:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 1.1248316120341266) internal successors, (2505), 2227 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2505 transitions. [2021-12-15 09:34:51,552 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2505 transitions. Word has length 257 [2021-12-15 09:34:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:51,553 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 2505 transitions. [2021-12-15 09:34:51,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2505 transitions. [2021-12-15 09:34:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:34:51,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:51,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:51,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:34:51,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1814419780, now seen corresponding path program 1 times [2021-12-15 09:34:51,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:51,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739996293] [2021-12-15 09:34:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:51,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-15 09:34:51,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739996293] [2021-12-15 09:34:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739996293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:51,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:51,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:51,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251534460] [2021-12-15 09:34:51,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:51,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:51,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:51,630 INFO L87 Difference]: Start difference. First operand 2228 states and 2505 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:51,974 INFO L93 Difference]: Finished difference Result 5288 states and 5982 transitions. [2021-12-15 09:34:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-12-15 09:34:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:51,983 INFO L225 Difference]: With dead ends: 5288 [2021-12-15 09:34:51,983 INFO L226 Difference]: Without dead ends: 3201 [2021-12-15 09:34:51,985 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 [2021-12-15 09:34:51,986 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 135 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:51,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 51 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-12-15 09:34:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2645. [2021-12-15 09:34:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 1.1161119515885023) internal successors, (2951), 2644 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 2951 transitions. [2021-12-15 09:34:52,021 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 2951 transitions. Word has length 270 [2021-12-15 09:34:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:52,022 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 2951 transitions. [2021-12-15 09:34:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 2951 transitions. [2021-12-15 09:34:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:34:52,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:52,025 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:34:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:34:52,026 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1670901537, now seen corresponding path program 1 times [2021-12-15 09:34:52,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:52,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719348087] [2021-12-15 09:34:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:52,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-15 09:34:52,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:52,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719348087] [2021-12-15 09:34:52,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719348087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:52,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:52,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:52,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426664727] [2021-12-15 09:34:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:52,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:52,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:52,093 INFO L87 Difference]: Start difference. First operand 2645 states and 2951 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:52,412 INFO L93 Difference]: Finished difference Result 5983 states and 6674 transitions. [2021-12-15 09:34:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 306 [2021-12-15 09:34:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:52,418 INFO L225 Difference]: With dead ends: 5983 [2021-12-15 09:34:52,418 INFO L226 Difference]: Without dead ends: 2506 [2021-12-15 09:34:52,421 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 [2021-12-15 09:34:52,421 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 133 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 225 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-12-15 09:34:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2506. [2021-12-15 09:34:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.111377245508982) internal successors, (2784), 2505 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 2784 transitions. [2021-12-15 09:34:52,452 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 2784 transitions. Word has length 306 [2021-12-15 09:34:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:52,452 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 2784 transitions. [2021-12-15 09:34:52,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 2784 transitions. [2021-12-15 09:34:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-15 09:34:52,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:52,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:52,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:34:52,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 179712783, now seen corresponding path program 1 times [2021-12-15 09:34:52,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651583464] [2021-12-15 09:34:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:52,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-15 09:34:52,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:52,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651583464] [2021-12-15 09:34:52,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651583464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:34:52,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:34:52,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:34:52,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733703059] [2021-12-15 09:34:52,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:34:52,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:34:52,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:34:52,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:34:52,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:34:52,537 INFO L87 Difference]: Start difference. First operand 2506 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:34:52,830 INFO L93 Difference]: Finished difference Result 4732 states and 5276 transitions. [2021-12-15 09:34:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:34:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 [2021-12-15 09:34:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:34:52,836 INFO L225 Difference]: With dead ends: 4732 [2021-12-15 09:34:52,836 INFO L226 Difference]: Without dead ends: 2367 [2021-12-15 09:34:52,838 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 [2021-12-15 09:34:52,839 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:34:52,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 210 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:34:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-12-15 09:34:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2367. [2021-12-15 09:34:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 1.084530853761623) internal successors, (2566), 2366 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2566 transitions. [2021-12-15 09:34:52,871 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2566 transitions. Word has length 350 [2021-12-15 09:34:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:34:52,872 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 2566 transitions. [2021-12-15 09:34:52,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:34:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2566 transitions. [2021-12-15 09:34:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-12-15 09:34:52,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:34:52,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:34:52,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:34:52,877 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:34:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:34:52,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1230177848, now seen corresponding path program 1 times [2021-12-15 09:34:52,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:34:52,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985086611] [2021-12-15 09:34:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:52,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:34:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 217 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:34:53,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:34:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985086611] [2021-12-15 09:34:53,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985086611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:34:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808959165] [2021-12-15 09:34:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:34:53,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:34:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:34:53,068 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) [2021-12-15 09:34:53,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:34:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:34:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 09:34:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates...