./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label27.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 e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:45:53,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:45:53,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:45:53,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:45:53,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:45:53,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:45:53,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:45:53,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:45:53,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:45:53,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:45:53,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:45:53,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:45:53,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:45:53,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:45:53,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:45:53,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:45:53,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:45:53,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:45:53,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:45:53,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:45:53,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:45:53,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:45:53,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:45:53,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:45:53,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:45:53,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:45:53,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:45:53,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:45:53,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:45:53,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:45:53,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:45:53,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:45:53,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:45:53,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:45:53,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:45:53,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:45:53,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:45:53,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:45:53,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:45:53,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:45:53,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:45:53,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:45:53,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:45:53,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:45:53,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:45:53,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:45:53,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:45:53,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:45:54,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:45:54,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:45:54,000 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:45:54,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:45:54,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:45:54,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:45:54,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:45:54,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:45:54,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:45:54,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:45:54,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:45:54,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:45:54,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:45:54,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:45:54,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:45:54,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:45:54,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:45:54,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d [2021-12-15 22:45:54,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:45:54,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:45:54,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:45:54,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:45:54,224 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:45:54,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2021-12-15 22:45:54,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eceb4d16/f1fa7e82d2b649f1a72b3d0d45705c23/FLAG7df1eef0a [2021-12-15 22:45:54,912 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:45:54,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2021-12-15 22:45:54,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eceb4d16/f1fa7e82d2b649f1a72b3d0d45705c23/FLAG7df1eef0a [2021-12-15 22:45:55,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eceb4d16/f1fa7e82d2b649f1a72b3d0d45705c23 [2021-12-15 22:45:55,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:45:55,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:45:55,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:45:55,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:45:55,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:45:55,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:45:55" (1/1) ... [2021-12-15 22:45:55,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d85ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:55, skipping insertion in model container [2021-12-15 22:45:55,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:45:55" (1/1) ... [2021-12-15 22:45:55,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:45:55,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:45:55,636 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/Problem13_label27.c[6468,6481] [2021-12-15 22:45:56,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:45:56,213 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:45:56,237 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/Problem13_label27.c[6468,6481] [2021-12-15 22:45:56,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:45:56,578 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:45:56,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56 WrapperNode [2021-12-15 22:45:56,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:45:56,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:45:56,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:45:56,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:45:56,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:56,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,051 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:45:57,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:45:57,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:45:57,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:45:57,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:45:57,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:45:57,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:45:57,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:45:57,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:45:57,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (1/1) ... [2021-12-15 22:45:57,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:45:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:45:57,828 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 22:45:57,864 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 22:45:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:45:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:45:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:45:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:45:57,940 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:45:57,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:46:01,319 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:46:01,330 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:46:01,330 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:46:01,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:46:01 BoogieIcfgContainer [2021-12-15 22:46:01,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:46:01,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:46:01,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:46:01,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:46:01,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:45:55" (1/3) ... [2021-12-15 22:46:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428235f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:46:01, skipping insertion in model container [2021-12-15 22:46:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:45:56" (2/3) ... [2021-12-15 22:46:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428235f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:46:01, skipping insertion in model container [2021-12-15 22:46:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:46:01" (3/3) ... [2021-12-15 22:46:01,337 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2021-12-15 22:46:01,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:46:01,340 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:46:01,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:46:01,377 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 22:46:01,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:46:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 22:46:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 22:46:01,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:01,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:46:01,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-15 22:46:01,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:01,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66316699] [2021-12-15 22:46:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:01,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:01,596 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 22:46:01,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:01,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66316699] [2021-12-15 22:46:01,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66316699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:01,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:01,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:46:01,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176647313] [2021-12-15 22:46:01,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:01,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:01,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:01,628 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 22:46:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:04,829 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-12-15 22:46:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-15 22:46:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:04,846 INFO L225 Difference]: With dead ends: 3082 [2021-12-15 22:46:04,846 INFO L226 Difference]: Without dead ends: 1899 [2021-12-15 22:46:04,850 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 22:46:04,852 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 994 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:04,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 22:46:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-15 22:46:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-12-15 22:46:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 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 22:46:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-12-15 22:46:04,925 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 45 [2021-12-15 22:46:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:04,925 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-12-15 22:46:04,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 22:46:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-12-15 22:46:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 22:46:04,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:04,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 22:46:04,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:46:04,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash 331802818, now seen corresponding path program 1 times [2021-12-15 22:46:04,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735386711] [2021-12-15 22:46:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:04,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:05,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:05,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735386711] [2021-12-15 22:46:05,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735386711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:05,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:05,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:05,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089093120] [2021-12-15 22:46:05,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:05,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:46:05,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:46:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:46:05,128 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 22:46:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:10,096 INFO L93 Difference]: Finished difference Result 6175 states and 10777 transitions. [2021-12-15 22:46:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:46:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 22:46:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:10,109 INFO L225 Difference]: With dead ends: 6175 [2021-12-15 22:46:10,109 INFO L226 Difference]: Without dead ends: 4283 [2021-12-15 22:46:10,112 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 22:46:10,113 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2572 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2572 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 5546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:10,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2572 Valid, 1098 Invalid, 5546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-15 22:46:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-12-15 22:46:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 4282. [2021-12-15 22:46:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 1.4882036907264657) internal successors, (6371), 4281 states have internal predecessors, (6371), 0 states have call successors, (0), 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 22:46:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6371 transitions. [2021-12-15 22:46:10,167 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6371 transitions. Word has length 110 [2021-12-15 22:46:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:10,168 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6371 transitions. [2021-12-15 22:46:10,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 22:46:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6371 transitions. [2021-12-15 22:46:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 22:46:10,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:10,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:10,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:46:10,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1267295969, now seen corresponding path program 1 times [2021-12-15 22:46:10,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686570272] [2021-12-15 22:46:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:10,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:10,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:10,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686570272] [2021-12-15 22:46:10,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686570272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:10,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:10,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:10,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942124687] [2021-12-15 22:46:10,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:10,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:10,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:10,251 INFO L87 Difference]: Start difference. First operand 4282 states and 6371 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 22:46:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:12,696 INFO L93 Difference]: Finished difference Result 7762 states and 11936 transitions. [2021-12-15 22:46:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-12-15 22:46:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:12,708 INFO L225 Difference]: With dead ends: 7762 [2021-12-15 22:46:12,709 INFO L226 Difference]: Without dead ends: 4269 [2021-12-15 22:46:12,712 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 22:46:12,718 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 1087 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:12,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1678 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:46:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-12-15 22:46:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4267. [2021-12-15 22:46:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 1.3330989217065166) internal successors, (5687), 4266 states have internal predecessors, (5687), 0 states have call successors, (0), 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 22:46:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 5687 transitions. [2021-12-15 22:46:12,809 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 5687 transitions. Word has length 170 [2021-12-15 22:46:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:12,810 INFO L470 AbstractCegarLoop]: Abstraction has 4267 states and 5687 transitions. [2021-12-15 22:46:12,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 22:46:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 5687 transitions. [2021-12-15 22:46:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-15 22:46:12,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:12,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-15 22:46:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:46:12,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2071840905, now seen corresponding path program 1 times [2021-12-15 22:46:12,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340179189] [2021-12-15 22:46:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:12,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:12,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:12,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340179189] [2021-12-15 22:46:12,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340179189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:12,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:12,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:12,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131545199] [2021-12-15 22:46:12,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:12,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:12,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:12,933 INFO L87 Difference]: Start difference. First operand 4267 states and 5687 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 22:46:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:15,886 INFO L93 Difference]: Finished difference Result 10915 states and 15072 transitions. [2021-12-15 22:46:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-12-15 22:46:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:15,906 INFO L225 Difference]: With dead ends: 10915 [2021-12-15 22:46:15,907 INFO L226 Difference]: Without dead ends: 7437 [2021-12-15 22:46:15,913 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 22:46:15,914 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 894 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:15,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 891 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:46:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2021-12-15 22:46:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7429. [2021-12-15 22:46:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 7428 states have (on average 1.2712708669897685) internal successors, (9443), 7428 states have internal predecessors, (9443), 0 states have call successors, (0), 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 22:46:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9443 transitions. [2021-12-15 22:46:16,017 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9443 transitions. Word has length 208 [2021-12-15 22:46:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:16,018 INFO L470 AbstractCegarLoop]: Abstraction has 7429 states and 9443 transitions. [2021-12-15 22:46:16,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 22:46:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9443 transitions. [2021-12-15 22:46:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-15 22:46:16,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:16,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:46:16,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:46:16,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1876420748, now seen corresponding path program 1 times [2021-12-15 22:46:16,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:16,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635558243] [2021-12-15 22:46:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:16,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 22:46:16,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635558243] [2021-12-15 22:46:16,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635558243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:16,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:16,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:46:16,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236976505] [2021-12-15 22:46:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:16,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:16,126 INFO L87 Difference]: Start difference. First operand 7429 states and 9443 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 22:46:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:19,109 INFO L93 Difference]: Finished difference Result 20399 states and 26349 transitions. [2021-12-15 22:46:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 227 [2021-12-15 22:46:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:19,142 INFO L225 Difference]: With dead ends: 20399 [2021-12-15 22:46:19,142 INFO L226 Difference]: Without dead ends: 13759 [2021-12-15 22:46:19,148 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 22:46:19,148 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 936 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 3283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:19,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 816 Invalid, 3283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:46:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-15 22:46:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13748. [2021-12-15 22:46:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13748 states, 13747 states have (on average 1.2024441696370116) internal successors, (16530), 13747 states have internal predecessors, (16530), 0 states have call successors, (0), 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 22:46:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 16530 transitions. [2021-12-15 22:46:19,308 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 16530 transitions. Word has length 227 [2021-12-15 22:46:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 13748 states and 16530 transitions. [2021-12-15 22:46:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 22:46:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 16530 transitions. [2021-12-15 22:46:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 22:46:19,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:19,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:46:19,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:46:19,314 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1582139820, now seen corresponding path program 1 times [2021-12-15 22:46:19,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:19,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129491828] [2021-12-15 22:46:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 22:46:19,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129491828] [2021-12-15 22:46:19,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129491828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:19,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:19,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:46:19,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159408225] [2021-12-15 22:46:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:19,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:19,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:19,409 INFO L87 Difference]: Start difference. First operand 13748 states and 16530 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 22:46:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:22,153 INFO L93 Difference]: Finished difference Result 37716 states and 45843 transitions. [2021-12-15 22:46:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 235 [2021-12-15 22:46:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:22,195 INFO L225 Difference]: With dead ends: 37716 [2021-12-15 22:46:22,195 INFO L226 Difference]: Without dead ends: 24757 [2021-12-15 22:46:22,210 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 22:46:22,211 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 838 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:22,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 999 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:46:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24757 states. [2021-12-15 22:46:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24757 to 23966. [2021-12-15 22:46:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23966 states, 23965 states have (on average 1.1530565407886502) internal successors, (27633), 23965 states have internal predecessors, (27633), 0 states have call successors, (0), 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 22:46:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23966 states to 23966 states and 27633 transitions. [2021-12-15 22:46:22,508 INFO L78 Accepts]: Start accepts. Automaton has 23966 states and 27633 transitions. Word has length 235 [2021-12-15 22:46:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:22,509 INFO L470 AbstractCegarLoop]: Abstraction has 23966 states and 27633 transitions. [2021-12-15 22:46:22,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 22:46:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23966 states and 27633 transitions. [2021-12-15 22:46:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-15 22:46:22,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:22,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:46:22,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:46:22,515 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1104360200, now seen corresponding path program 1 times [2021-12-15 22:46:22,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:22,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30134765] [2021-12-15 22:46:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:22,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:46:22,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:22,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30134765] [2021-12-15 22:46:22,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30134765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:22,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:22,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:22,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216356524] [2021-12-15 22:46:22,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:22,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:22,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:22,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:22,626 INFO L87 Difference]: Start difference. First operand 23966 states and 27633 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 22:46:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:25,341 INFO L93 Difference]: Finished difference Result 57401 states and 65807 transitions. [2021-12-15 22:46:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 331 [2021-12-15 22:46:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:25,379 INFO L225 Difference]: With dead ends: 57401 [2021-12-15 22:46:25,379 INFO L226 Difference]: Without dead ends: 32646 [2021-12-15 22:46:25,400 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 22:46:25,403 INFO L933 BasicCegarLoop]: 1751 mSDtfsCounter, 685 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:25,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1891 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:46:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32646 states. [2021-12-15 22:46:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32646 to 31834. [2021-12-15 22:46:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31834 states, 31833 states have (on average 1.1325354192190493) internal successors, (36052), 31833 states have internal predecessors, (36052), 0 states have call successors, (0), 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 22:46:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 36052 transitions. [2021-12-15 22:46:25,713 INFO L78 Accepts]: Start accepts. Automaton has 31834 states and 36052 transitions. Word has length 331 [2021-12-15 22:46:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 31834 states and 36052 transitions. [2021-12-15 22:46:25,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 22:46:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 31834 states and 36052 transitions. [2021-12-15 22:46:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 22:46:25,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:25,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:46:25,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:46:25,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 264291229, now seen corresponding path program 1 times [2021-12-15 22:46:25,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:25,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243016806] [2021-12-15 22:46:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:25,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 22:46:25,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243016806] [2021-12-15 22:46:25,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243016806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:25,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:25,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:25,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270887129] [2021-12-15 22:46:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:25,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:25,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:25,825 INFO L87 Difference]: Start difference. First operand 31834 states and 36052 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 22:46:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:29,047 INFO L93 Difference]: Finished difference Result 74692 states and 85600 transitions. [2021-12-15 22:46:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 336 [2021-12-15 22:46:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:29,094 INFO L225 Difference]: With dead ends: 74692 [2021-12-15 22:46:29,095 INFO L226 Difference]: Without dead ends: 43647 [2021-12-15 22:46:29,110 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 22:46:29,111 INFO L933 BasicCegarLoop]: 1772 mSDtfsCounter, 823 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:29,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1914 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:46:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43647 states. [2021-12-15 22:46:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43647 to 42856. [2021-12-15 22:46:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42856 states, 42855 states have (on average 1.1146890677867227) internal successors, (47770), 42855 states have internal predecessors, (47770), 0 states have call successors, (0), 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 22:46:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42856 states to 42856 states and 47770 transitions. [2021-12-15 22:46:29,500 INFO L78 Accepts]: Start accepts. Automaton has 42856 states and 47770 transitions. Word has length 336 [2021-12-15 22:46:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:29,500 INFO L470 AbstractCegarLoop]: Abstraction has 42856 states and 47770 transitions. [2021-12-15 22:46:29,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 22:46:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42856 states and 47770 transitions. [2021-12-15 22:46:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-15 22:46:29,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:29,505 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 22:46:29,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:46:29,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1608914351, now seen corresponding path program 1 times [2021-12-15 22:46:29,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:29,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065056864] [2021-12-15 22:46:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:29,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 22:46:29,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065056864] [2021-12-15 22:46:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065056864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:29,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:29,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:29,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824631008] [2021-12-15 22:46:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:29,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:29,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:29,638 INFO L87 Difference]: Start difference. First operand 42856 states and 47770 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 22:46:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:32,459 INFO L93 Difference]: Finished difference Result 84921 states and 94745 transitions. [2021-12-15 22:46:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 370 [2021-12-15 22:46:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:32,497 INFO L225 Difference]: With dead ends: 84921 [2021-12-15 22:46:32,497 INFO L226 Difference]: Without dead ends: 42854 [2021-12-15 22:46:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 22:46:32,515 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1157 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:32,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 1421 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:46:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42854 states. [2021-12-15 22:46:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42854 to 42853. [2021-12-15 22:46:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42853 states, 42852 states have (on average 1.0876271819284982) internal successors, (46607), 42852 states have internal predecessors, (46607), 0 states have call successors, (0), 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 22:46:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42853 states to 42853 states and 46607 transitions. [2021-12-15 22:46:32,945 INFO L78 Accepts]: Start accepts. Automaton has 42853 states and 46607 transitions. Word has length 370 [2021-12-15 22:46:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:32,946 INFO L470 AbstractCegarLoop]: Abstraction has 42853 states and 46607 transitions. [2021-12-15 22:46:32,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 22:46:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 42853 states and 46607 transitions. [2021-12-15 22:46:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-15 22:46:32,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:32,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 22:46:32,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:46:32,952 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash 271548370, now seen corresponding path program 1 times [2021-12-15 22:46:32,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494271894] [2021-12-15 22:46:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:32,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-15 22:46:33,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494271894] [2021-12-15 22:46:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494271894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:33,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:33,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:33,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002004241] [2021-12-15 22:46:33,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:33,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:46:33,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:46:33,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:46:33,036 INFO L87 Difference]: Start difference. First operand 42853 states and 46607 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 22:46:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:39,039 INFO L93 Difference]: Finished difference Result 147299 states and 160570 transitions. [2021-12-15 22:46:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:46:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-12-15 22:46:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:39,164 INFO L225 Difference]: With dead ends: 147299 [2021-12-15 22:46:39,164 INFO L226 Difference]: Without dead ends: 105235 [2021-12-15 22:46:39,181 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 22:46:39,182 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 1700 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 6630 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 7649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 6630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:39,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 807 Invalid, 7649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 6630 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 22:46:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105235 states. [2021-12-15 22:46:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105235 to 102742. [2021-12-15 22:46:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102742 states, 102741 states have (on average 1.079695545108574) internal successors, (110929), 102741 states have internal predecessors, (110929), 0 states have call successors, (0), 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 22:46:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102742 states to 102742 states and 110929 transitions. [2021-12-15 22:46:40,554 INFO L78 Accepts]: Start accepts. Automaton has 102742 states and 110929 transitions. Word has length 393 [2021-12-15 22:46:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:40,555 INFO L470 AbstractCegarLoop]: Abstraction has 102742 states and 110929 transitions. [2021-12-15 22:46:40,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 22:46:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 102742 states and 110929 transitions. [2021-12-15 22:46:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-15 22:46:40,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:40,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 22:46:40,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:46:40,586 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash -408391344, now seen corresponding path program 1 times [2021-12-15 22:46:40,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:40,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357373502] [2021-12-15 22:46:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:40,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:46:40,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357373502] [2021-12-15 22:46:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357373502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:40,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58677346] [2021-12-15 22:46:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:40,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:40,794 INFO L87 Difference]: Start difference. First operand 102742 states and 110929 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 22:46:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:43,951 INFO L93 Difference]: Finished difference Result 206293 states and 222687 transitions. [2021-12-15 22:46:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 426 [2021-12-15 22:46:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:44,225 INFO L225 Difference]: With dead ends: 206293 [2021-12-15 22:46:44,225 INFO L226 Difference]: Without dead ends: 104340 [2021-12-15 22:46:44,252 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 22:46:44,252 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 801 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:44,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 1110 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:46:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104340 states. [2021-12-15 22:46:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104340 to 102743. [2021-12-15 22:46:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102743 states, 102742 states have (on average 1.072336532284752) internal successors, (110174), 102742 states have internal predecessors, (110174), 0 states have call successors, (0), 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 22:46:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102743 states to 102743 states and 110174 transitions. [2021-12-15 22:46:45,420 INFO L78 Accepts]: Start accepts. Automaton has 102743 states and 110174 transitions. Word has length 426 [2021-12-15 22:46:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:45,420 INFO L470 AbstractCegarLoop]: Abstraction has 102743 states and 110174 transitions. [2021-12-15 22:46:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 22:46:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 102743 states and 110174 transitions. [2021-12-15 22:46:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-15 22:46:45,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:45,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:46:45,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:46:45,428 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1634378536, now seen corresponding path program 1 times [2021-12-15 22:46:45,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:45,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381732225] [2021-12-15 22:46:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:45,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 386 proven. 110 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-15 22:46:45,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381732225] [2021-12-15 22:46:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381732225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:46:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42396008] [2021-12-15 22:46:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:45,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:46:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:46:45,843 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 22:46:45,844 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 22:46:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:46:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:46:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-15 22:46:47,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:46:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42396008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:47,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:46:47,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 22:46:47,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079267652] [2021-12-15 22:46:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:47,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:47,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:46:47,110 INFO L87 Difference]: Start difference. First operand 102743 states and 110174 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 22:46:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:49,983 INFO L93 Difference]: Finished difference Result 197618 states and 212233 transitions. [2021-12-15 22:46:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 436 [2021-12-15 22:46:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:50,121 INFO L225 Difference]: With dead ends: 197618 [2021-12-15 22:46:50,122 INFO L226 Difference]: Without dead ends: 106689 [2021-12-15 22:46:50,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:46:50,304 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 683 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:50,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 1160 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:46:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106689 states. [2021-12-15 22:46:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106689 to 105105. [2021-12-15 22:46:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105105 states, 105104 states have (on average 1.065582660983407) internal successors, (111997), 105104 states have internal predecessors, (111997), 0 states have call successors, (0), 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 22:46:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105105 states to 105105 states and 111997 transitions. [2021-12-15 22:46:51,814 INFO L78 Accepts]: Start accepts. Automaton has 105105 states and 111997 transitions. Word has length 436 [2021-12-15 22:46:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:51,815 INFO L470 AbstractCegarLoop]: Abstraction has 105105 states and 111997 transitions. [2021-12-15 22:46:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 22:46:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105105 states and 111997 transitions. [2021-12-15 22:46:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-15 22:46:51,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:51,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:46:51,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:46:52,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 22:46:52,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:52,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1472115083, now seen corresponding path program 1 times [2021-12-15 22:46:52,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626721825] [2021-12-15 22:46:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:52,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-15 22:46:52,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626721825] [2021-12-15 22:46:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626721825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:52,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:52,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:52,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214494397] [2021-12-15 22:46:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:52,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:52,198 INFO L87 Difference]: Start difference. First operand 105105 states and 111997 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 22:46:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:46:55,536 INFO L93 Difference]: Finished difference Result 208632 states and 222340 transitions. [2021-12-15 22:46:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:46:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 482 [2021-12-15 22:46:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:46:55,688 INFO L225 Difference]: With dead ends: 208632 [2021-12-15 22:46:55,688 INFO L226 Difference]: Without dead ends: 104316 [2021-12-15 22:46:55,729 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 22:46:55,730 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 938 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:46:55,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1427 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:46:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104316 states. [2021-12-15 22:46:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104316 to 103515. [2021-12-15 22:46:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 1.0549587495411248) internal successors, (109203), 103514 states have internal predecessors, (109203), 0 states have call successors, (0), 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 22:46:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 109203 transitions. [2021-12-15 22:46:56,984 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 109203 transitions. Word has length 482 [2021-12-15 22:46:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:46:56,984 INFO L470 AbstractCegarLoop]: Abstraction has 103515 states and 109203 transitions. [2021-12-15 22:46:56,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 22:46:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 109203 transitions. [2021-12-15 22:46:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-12-15 22:46:56,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:46:56,994 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-15 22:46:56,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:46:56,995 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:46:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:46:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash 762998249, now seen corresponding path program 1 times [2021-12-15 22:46:56,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:46:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658621175] [2021-12-15 22:46:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:46:56,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:46:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:46:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 760 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-15 22:46:57,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:46:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658621175] [2021-12-15 22:46:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658621175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:46:57,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:46:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:46:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924040503] [2021-12-15 22:46:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:46:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:46:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:46:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:46:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:46:57,117 INFO L87 Difference]: Start difference. First operand 103515 states and 109203 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)