./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_label42.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 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:07:54,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:07:54,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:07:54,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:07:54,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:07:54,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:07:54,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:07:54,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:07:54,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:07:54,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:07:54,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:07:54,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:07:54,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:07:54,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:07:54,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:07:54,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:07:54,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:07:54,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:07:54,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:07:54,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:07:54,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:07:54,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:07:54,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:07:54,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:07:54,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:07:54,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:07:54,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:07:54,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:07:54,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:07:54,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:07:54,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:07:54,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:07:54,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:07:54,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:07:54,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:07:54,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:07:54,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:07:54,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:07:54,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:07:54,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:07:54,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:07:54,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:07:54,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:07:54,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:07:54,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:07:54,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:07:54,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:07:54,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:07:54,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:07:54,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:07:54,878 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:07:54,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:07:54,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:07:54,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:07:54,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:07:54,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:07:54,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:07:54,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:07:54,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:07:54,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:07:54,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e [2021-12-21 11:07:55,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:07:55,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:07:55,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:07:55,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:07:55,092 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:07:55,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-21 11:07:55,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09799e92/4109a44f0b534aaf9096b9550d96911c/FLAG278156d08 [2021-12-21 11:07:55,697 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:07:55,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-21 11:07:55,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09799e92/4109a44f0b534aaf9096b9550d96911c/FLAG278156d08 [2021-12-21 11:07:55,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f09799e92/4109a44f0b534aaf9096b9550d96911c [2021-12-21 11:07:55,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:07:55,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:07:55,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:07:55,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:07:55,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:07:55,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:07:55" (1/1) ... [2021-12-21 11:07:55,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78133195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:55, skipping insertion in model container [2021-12-21 11:07:55,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:07:55" (1/1) ... [2021-12-21 11:07:55,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:07:56,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:07:56,301 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_label42.c[9228,9241] [2021-12-21 11:07:56,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:07:56,887 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:07:56,914 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_label42.c[9228,9241] [2021-12-21 11:07:57,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:07:57,338 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:07:57,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57 WrapperNode [2021-12-21 11:07:57,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:07:57,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:07:57,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:07:57,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:07:57,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:57,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:57,781 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-21 11:07:57,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:07:57,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:07:57,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:07:57,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:07:57,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:57,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:57,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:57,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:58,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:58,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:58,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:58,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:07:58,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:07:58,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:07:58,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:07:58,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (1/1) ... [2021-12-21 11:07:58,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:07:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:07:58,337 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) [2021-12-21 11:07:58,356 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 [2021-12-21 11:07:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:07:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:07:58,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:07:58,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:07:58,437 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:07:58,438 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:08:01,755 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:08:01,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:08:01,771 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:08:01,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:08:01 BoogieIcfgContainer [2021-12-21 11:08:01,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:08:01,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:08:01,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:08:01,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:08:01,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:07:55" (1/3) ... [2021-12-21 11:08:01,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cd8275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:08:01, skipping insertion in model container [2021-12-21 11:08:01,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:57" (2/3) ... [2021-12-21 11:08:01,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cd8275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:08:01, skipping insertion in model container [2021-12-21 11:08:01,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:08:01" (3/3) ... [2021-12-21 11:08:01,782 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label42.c [2021-12-21 11:08:01,786 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:08:01,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:08:01,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:08:01,831 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 [2021-12-21 11:08:01,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:08:01,855 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) [2021-12-21 11:08:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 11:08:01,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:01,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:01,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:01,866 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-21 11:08:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286855447] [2021-12-21 11:08:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:01,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:02,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:02,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286855447] [2021-12-21 11:08:02,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286855447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:02,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:02,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:02,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779246618] [2021-12-21 11:08:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:02,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:02,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:02,149 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 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:05,350 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-21 11:08:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 11:08:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:05,368 INFO L225 Difference]: With dead ends: 3121 [2021-12-21 11:08:05,369 INFO L226 Difference]: Without dead ends: 1944 [2021-12-21 11:08:05,374 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 [2021-12-21 11:08:05,376 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:05,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 11:08:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-21 11:08:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-21 11:08:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-21 11:08:05,511 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 65 [2021-12-21 11:08:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:05,511 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-21 11:08:05,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-21 11:08:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 11:08:05,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:05,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:05,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:08:05,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -746498798, now seen corresponding path program 1 times [2021-12-21 11:08:05,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650040178] [2021-12-21 11:08:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:05,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:05,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:05,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650040178] [2021-12-21 11:08:05,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650040178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:05,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:05,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:05,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341969848] [2021-12-21 11:08:05,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:05,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:05,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:05,592 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:08,537 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-12-21 11:08:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-21 11:08:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:08,550 INFO L225 Difference]: With dead ends: 5351 [2021-12-21 11:08:08,550 INFO L226 Difference]: Without dead ends: 3480 [2021-12-21 11:08:08,555 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 [2021-12-21 11:08:08,556 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:08,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:08:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-12-21 11:08:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-12-21 11:08:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-12-21 11:08:08,623 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 130 [2021-12-21 11:08:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:08,623 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-12-21 11:08:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-12-21 11:08:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 11:08:08,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:08,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:08,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:08:08,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1004753335, now seen corresponding path program 1 times [2021-12-21 11:08:08,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:08,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627661562] [2021-12-21 11:08:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:08,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:08,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627661562] [2021-12-21 11:08:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627661562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:08,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:08,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:08,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920158435] [2021-12-21 11:08:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:08,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:08,689 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:11,562 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2021-12-21 11:08:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-21 11:08:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:11,603 INFO L225 Difference]: With dead ends: 10144 [2021-12-21 11:08:11,603 INFO L226 Difference]: Without dead ends: 6667 [2021-12-21 11:08:11,607 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 [2021-12-21 11:08:11,624 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:11,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:08:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-12-21 11:08:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2021-12-21 11:08:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-12-21 11:08:11,714 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 132 [2021-12-21 11:08:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:11,715 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-12-21 11:08:11,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-12-21 11:08:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-21 11:08:11,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:11,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:11,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:08:11,720 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -894756506, now seen corresponding path program 1 times [2021-12-21 11:08:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792682744] [2021-12-21 11:08:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:11,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:11,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:11,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792682744] [2021-12-21 11:08:11,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792682744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:11,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:11,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:11,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996835775] [2021-12-21 11:08:11,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:11,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:11,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:11,822 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:14,188 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-12-21 11:08:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-12-21 11:08:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:14,227 INFO L225 Difference]: With dead ends: 19637 [2021-12-21 11:08:14,227 INFO L226 Difference]: Without dead ends: 12982 [2021-12-21 11:08:14,237 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 [2021-12-21 11:08:14,247 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 792 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:14,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 1162 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:08:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-12-21 11:08:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12964. [2021-12-21 11:08:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2390650312427678) internal successors, (16062), 12963 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16062 transitions. [2021-12-21 11:08:14,465 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16062 transitions. Word has length 138 [2021-12-21 11:08:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:14,466 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16062 transitions. [2021-12-21 11:08:14,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16062 transitions. [2021-12-21 11:08:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-21 11:08:14,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:14,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:14,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:08:14,470 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1196327346, now seen corresponding path program 1 times [2021-12-21 11:08:14,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326302148] [2021-12-21 11:08:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:14,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:14,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326302148] [2021-12-21 11:08:14,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326302148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:14,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:14,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:14,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499159160] [2021-12-21 11:08:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:14,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:14,586 INFO L87 Difference]: Start difference. First operand 12964 states and 16062 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:17,076 INFO L93 Difference]: Finished difference Result 26713 states and 32924 transitions. [2021-12-21 11:08:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2021-12-21 11:08:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:17,104 INFO L225 Difference]: With dead ends: 26713 [2021-12-21 11:08:17,104 INFO L226 Difference]: Without dead ends: 13751 [2021-12-21 11:08:17,116 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 [2021-12-21 11:08:17,118 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:17,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:08:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2021-12-21 11:08:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 13751. [2021-12-21 11:08:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13751 states, 13750 states have (on average 1.2257454545454545) internal successors, (16854), 13750 states have internal predecessors, (16854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13751 states to 13751 states and 16854 transitions. [2021-12-21 11:08:17,279 INFO L78 Accepts]: Start accepts. Automaton has 13751 states and 16854 transitions. Word has length 154 [2021-12-21 11:08:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:17,280 INFO L470 AbstractCegarLoop]: Abstraction has 13751 states and 16854 transitions. [2021-12-21 11:08:17,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13751 states and 16854 transitions. [2021-12-21 11:08:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 11:08:17,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:17,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:08:17,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:08:17,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash -62914249, now seen corresponding path program 1 times [2021-12-21 11:08:17,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573281756] [2021-12-21 11:08:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:17,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:17,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573281756] [2021-12-21 11:08:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573281756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:17,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:17,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:17,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659575086] [2021-12-21 11:08:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:17,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:17,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:17,368 INFO L87 Difference]: Start difference. First operand 13751 states and 16854 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:19,690 INFO L93 Difference]: Finished difference Result 26728 states and 32944 transitions. [2021-12-21 11:08:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-21 11:08:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:19,730 INFO L225 Difference]: With dead ends: 26728 [2021-12-21 11:08:19,743 INFO L226 Difference]: Without dead ends: 13766 [2021-12-21 11:08:19,754 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 [2021-12-21 11:08:19,756 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 1059 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:19,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 1309 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:08:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13766 states. [2021-12-21 11:08:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13766 to 13748. [2021-12-21 11:08:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13748 states, 13747 states have (on average 1.203753546228268) internal successors, (16548), 13747 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 16548 transitions. [2021-12-21 11:08:19,916 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 16548 transitions. Word has length 161 [2021-12-21 11:08:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:19,917 INFO L470 AbstractCegarLoop]: Abstraction has 13748 states and 16548 transitions. [2021-12-21 11:08:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 16548 transitions. [2021-12-21 11:08:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-21 11:08:19,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:19,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:08:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:08:19,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2120074091, now seen corresponding path program 1 times [2021-12-21 11:08:19,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:19,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534465354] [2021-12-21 11:08:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:19,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:08:19,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534465354] [2021-12-21 11:08:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534465354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:19,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:19,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:19,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896133125] [2021-12-21 11:08:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:19,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:19,986 INFO L87 Difference]: Start difference. First operand 13748 states and 16548 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:22,963 INFO L93 Difference]: Finished difference Result 33020 states and 40677 transitions. [2021-12-21 11:08:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2021-12-21 11:08:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:22,991 INFO L225 Difference]: With dead ends: 33020 [2021-12-21 11:08:22,991 INFO L226 Difference]: Without dead ends: 20061 [2021-12-21 11:08:23,003 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 [2021-12-21 11:08:23,004 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 881 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:23,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 945 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:08:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20061 states. [2021-12-21 11:08:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20061 to 20051. [2021-12-21 11:08:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20051 states, 20050 states have (on average 1.1791022443890273) internal successors, (23641), 20050 states have internal predecessors, (23641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20051 states to 20051 states and 23641 transitions. [2021-12-21 11:08:23,400 INFO L78 Accepts]: Start accepts. Automaton has 20051 states and 23641 transitions. Word has length 243 [2021-12-21 11:08:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:23,401 INFO L470 AbstractCegarLoop]: Abstraction has 20051 states and 23641 transitions. [2021-12-21 11:08:23,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 20051 states and 23641 transitions. [2021-12-21 11:08:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-12-21 11:08:23,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:23,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:08:23,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -71323228, now seen corresponding path program 1 times [2021-12-21 11:08:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686833964] [2021-12-21 11:08:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:23,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-21 11:08:23,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686833964] [2021-12-21 11:08:23,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686833964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:23,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900919860] [2021-12-21 11:08:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:23,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:23,530 INFO L87 Difference]: Start difference. First operand 20051 states and 23641 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:26,653 INFO L93 Difference]: Finished difference Result 45632 states and 54873 transitions. [2021-12-21 11:08:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 332 [2021-12-21 11:08:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:26,692 INFO L225 Difference]: With dead ends: 45632 [2021-12-21 11:08:26,693 INFO L226 Difference]: Without dead ends: 26370 [2021-12-21 11:08:26,709 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 [2021-12-21 11:08:26,710 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 968 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:26,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 787 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:08:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26370 states. [2021-12-21 11:08:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26370 to 26358. [2021-12-21 11:08:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26358 states, 26357 states have (on average 1.1839738968774898) internal successors, (31206), 26357 states have internal predecessors, (31206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26358 states to 26358 states and 31206 transitions. [2021-12-21 11:08:26,972 INFO L78 Accepts]: Start accepts. Automaton has 26358 states and 31206 transitions. Word has length 332 [2021-12-21 11:08:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:26,973 INFO L470 AbstractCegarLoop]: Abstraction has 26358 states and 31206 transitions. [2021-12-21 11:08:26,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26358 states and 31206 transitions. [2021-12-21 11:08:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-12-21 11:08:26,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:26,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:08:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:08:26,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1335303458, now seen corresponding path program 1 times [2021-12-21 11:08:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027013149] [2021-12-21 11:08:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:26,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-21 11:08:27,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:27,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027013149] [2021-12-21 11:08:27,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027013149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:27,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:27,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:08:27,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071341745] [2021-12-21 11:08:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:27,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:27,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:27,197 INFO L87 Difference]: Start difference. First operand 26358 states and 31206 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:29,843 INFO L93 Difference]: Finished difference Result 61391 states and 72386 transitions. [2021-12-21 11:08:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 384 [2021-12-21 11:08:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:29,885 INFO L225 Difference]: With dead ends: 61391 [2021-12-21 11:08:29,886 INFO L226 Difference]: Without dead ends: 35822 [2021-12-21 11:08:29,905 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 [2021-12-21 11:08:29,907 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 728 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:29,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1226 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:08:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35822 states. [2021-12-21 11:08:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35822 to 35812. [2021-12-21 11:08:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35812 states, 35811 states have (on average 1.1522716483761972) internal successors, (41264), 35811 states have internal predecessors, (41264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35812 states to 35812 states and 41264 transitions. [2021-12-21 11:08:30,252 INFO L78 Accepts]: Start accepts. Automaton has 35812 states and 41264 transitions. Word has length 384 [2021-12-21 11:08:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:30,252 INFO L470 AbstractCegarLoop]: Abstraction has 35812 states and 41264 transitions. [2021-12-21 11:08:30,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 35812 states and 41264 transitions. [2021-12-21 11:08:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-21 11:08:30,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:30,258 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 11:08:30,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:08:30,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash -607606650, now seen corresponding path program 1 times [2021-12-21 11:08:30,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574225017] [2021-12-21 11:08:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:30,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 251 proven. 75 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-21 11:08:30,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574225017] [2021-12-21 11:08:30,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574225017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:08:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298899262] [2021-12-21 11:08:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:30,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:08:30,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:08:30,416 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) [2021-12-21 11:08:30,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:08:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:30,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:08:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:08:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-12-21 11:08:31,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:08:31,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298899262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:31,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:08:31,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 11:08:31,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033501318] [2021-12-21 11:08:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:31,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:31,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:31,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:08:31,220 INFO L87 Difference]: Start difference. First operand 35812 states and 41264 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:34,478 INFO L93 Difference]: Finished difference Result 101690 states and 117796 transitions. [2021-12-21 11:08:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 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 392 [2021-12-21 11:08:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:34,560 INFO L225 Difference]: With dead ends: 101690 [2021-12-21 11:08:34,560 INFO L226 Difference]: Without dead ends: 66667 [2021-12-21 11:08:34,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:08:34,618 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1043 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:34,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 1139 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:08:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66667 states. [2021-12-21 11:08:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66667 to 65861. [2021-12-21 11:08:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65861 states, 65860 states have (on average 1.1312784694807168) internal successors, (74506), 65860 states have internal predecessors, (74506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65861 states to 65861 states and 74506 transitions. [2021-12-21 11:08:35,386 INFO L78 Accepts]: Start accepts. Automaton has 65861 states and 74506 transitions. Word has length 392 [2021-12-21 11:08:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:35,387 INFO L470 AbstractCegarLoop]: Abstraction has 65861 states and 74506 transitions. [2021-12-21 11:08:35,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 65861 states and 74506 transitions. [2021-12-21 11:08:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-21 11:08:35,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:35,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:35,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:08:35,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 11:08:35,614 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1692395044, now seen corresponding path program 1 times [2021-12-21 11:08:35,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:35,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935506449] [2021-12-21 11:08:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:35,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:08:36,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935506449] [2021-12-21 11:08:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935506449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:36,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:36,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194244447] [2021-12-21 11:08:36,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:36,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:36,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:36,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:36,013 INFO L87 Difference]: Start difference. First operand 65861 states and 74506 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:39,914 INFO L93 Difference]: Finished difference Result 161805 states and 183745 transitions. [2021-12-21 11:08:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 392 [2021-12-21 11:08:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:40,024 INFO L225 Difference]: With dead ends: 161805 [2021-12-21 11:08:40,024 INFO L226 Difference]: Without dead ends: 96733 [2021-12-21 11:08:40,163 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 [2021-12-21 11:08:40,164 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 975 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2989 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 2989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:40,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 464 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 2989 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-21 11:08:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96733 states. [2021-12-21 11:08:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96733 to 95829. [2021-12-21 11:08:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95829 states, 95828 states have (on average 1.1344596568852527) internal successors, (108713), 95828 states have internal predecessors, (108713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95829 states to 95829 states and 108713 transitions. [2021-12-21 11:08:41,320 INFO L78 Accepts]: Start accepts. Automaton has 95829 states and 108713 transitions. Word has length 392 [2021-12-21 11:08:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:41,320 INFO L470 AbstractCegarLoop]: Abstraction has 95829 states and 108713 transitions. [2021-12-21 11:08:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 95829 states and 108713 transitions. [2021-12-21 11:08:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-21 11:08:41,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:41,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:41,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:08:41,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -373450363, now seen corresponding path program 1 times [2021-12-21 11:08:41,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:41,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191127024] [2021-12-21 11:08:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:41,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-21 11:08:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191127024] [2021-12-21 11:08:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191127024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:41,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:41,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749858506] [2021-12-21 11:08:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:08:41,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:08:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:08:41,446 INFO L87 Difference]: Start difference. First operand 95829 states and 108713 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) [2021-12-21 11:08:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:47,862 INFO L93 Difference]: Finished difference Result 267516 states and 305475 transitions. [2021-12-21 11:08:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:08:47,863 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 427 [2021-12-21 11:08:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:48,095 INFO L225 Difference]: With dead ends: 267516 [2021-12-21 11:08:48,096 INFO L226 Difference]: Without dead ends: 173263 [2021-12-21 11:08:48,157 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 [2021-12-21 11:08:48,157 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 1739 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 6737 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 7843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 6737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:48,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 786 Invalid, 7843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 6737 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-21 11:08:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173263 states. [2021-12-21 11:08:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173263 to 173067. [2021-12-21 11:08:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173067 states, 173066 states have (on average 1.1325274750673153) internal successors, (196002), 173066 states have internal predecessors, (196002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173067 states to 173067 states and 196002 transitions. [2021-12-21 11:08:50,486 INFO L78 Accepts]: Start accepts. Automaton has 173067 states and 196002 transitions. Word has length 427 [2021-12-21 11:08:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:50,487 INFO L470 AbstractCegarLoop]: Abstraction has 173067 states and 196002 transitions. [2021-12-21 11:08:50,487 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) [2021-12-21 11:08:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 173067 states and 196002 transitions. [2021-12-21 11:08:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-12-21 11:08:50,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:50,505 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, 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, 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] [2021-12-21 11:08:50,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:08:50,506 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1281024426, now seen corresponding path program 1 times [2021-12-21 11:08:50,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:50,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122150111] [2021-12-21 11:08:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:50,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 429 proven. 113 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-21 11:08:50,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122150111] [2021-12-21 11:08:50,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122150111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:08:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955441587] [2021-12-21 11:08:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:50,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:08:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:08:50,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:08:50,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:08:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:08:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:08:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-21 11:08:52,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:08:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955441587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:52,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:08:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 11:08:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676181851] [2021-12-21 11:08:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:52,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:08:52,294 INFO L87 Difference]: Start difference. First operand 173067 states and 196002 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) [2021-12-21 11:08:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:08:55,677 INFO L93 Difference]: Finished difference Result 321743 states and 366469 transitions. [2021-12-21 11:08:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:08:55,677 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 459 [2021-12-21 11:08:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:08:56,088 INFO L225 Difference]: With dead ends: 321743 [2021-12-21 11:08:56,089 INFO L226 Difference]: Without dead ends: 178602 [2021-12-21 11:08:56,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:08:56,133 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 686 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:08:56,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1185 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:08:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178602 states. [2021-12-21 11:08:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178602 to 178584. [2021-12-21 11:08:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178584 states, 178583 states have (on average 1.1295924024123236) internal successors, (201726), 178583 states have internal predecessors, (201726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:08:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178584 states to 178584 states and 201726 transitions. [2021-12-21 11:08:58,264 INFO L78 Accepts]: Start accepts. Automaton has 178584 states and 201726 transitions. Word has length 459 [2021-12-21 11:08:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:08:58,265 INFO L470 AbstractCegarLoop]: Abstraction has 178584 states and 201726 transitions. [2021-12-21 11:08:58,265 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) [2021-12-21 11:08:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 178584 states and 201726 transitions. [2021-12-21 11:08:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-21 11:08:58,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:08:58,275 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:08:58,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:08:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 11:08:58,494 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:08:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:08:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1823682249, now seen corresponding path program 1 times [2021-12-21 11:08:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:08:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106811885] [2021-12-21 11:08:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:08:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:08:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:08:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-21 11:08:58,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:08:58,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106811885] [2021-12-21 11:08:58,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106811885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:08:58,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:08:58,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:08:58,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503127173] [2021-12-21 11:08:58,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:08:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:08:58,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:08:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:08:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:08:58,694 INFO L87 Difference]: Start difference. First operand 178584 states and 201726 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)