./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label26.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/Problem17_label26.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 d21e74f8974e22fefe5d2a2f720c109d2a535f54b9e443011df3f86444f64325 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:21:40,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:21:40,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:21:40,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:21:40,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:21:40,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:21:40,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:21:40,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:21:40,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:21:40,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:21:40,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:21:40,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:21:40,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:21:40,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:21:40,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:21:40,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:21:40,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:21:40,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:21:40,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:21:40,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:21:40,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:21:40,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:21:40,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:21:40,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:21:40,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:21:40,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:21:40,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:21:40,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:21:40,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:21:40,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:21:40,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:21:40,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:21:40,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:21:40,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:21:40,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:21:40,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:21:40,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:21:40,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:21:40,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:21:40,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:21:40,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:21:40,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:21:40,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:21:40,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:21:40,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:21:40,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:21:40,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:21:40,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:21:40,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:21:40,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:21:40,176 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:21:40,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:21:40,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:21:40,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:21:40,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:21:40,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:21:40,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:21:40,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:21:40,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:21:40,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:21:40,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:40,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:21:40,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:21:40,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:21:40,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:21:40,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d21e74f8974e22fefe5d2a2f720c109d2a535f54b9e443011df3f86444f64325 [2021-12-21 11:21:40,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:21:40,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:21:40,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:21:40,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:21:40,382 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:21:40,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label26.c [2021-12-21 11:21:40,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6acf9c7d/df3516c5c0454da4a45386348e482eae/FLAG713e19884 [2021-12-21 11:21:40,932 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:21:40,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label26.c [2021-12-21 11:21:40,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6acf9c7d/df3516c5c0454da4a45386348e482eae/FLAG713e19884 [2021-12-21 11:21:41,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6acf9c7d/df3516c5c0454da4a45386348e482eae [2021-12-21 11:21:41,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:21:41,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:21:41,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:41,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:21:41,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:21:41,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:41" (1/1) ... [2021-12-21 11:21:41,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5960c6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:41, skipping insertion in model container [2021-12-21 11:21:41,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:41" (1/1) ... [2021-12-21 11:21:41,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:21:41,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:21:41,410 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/Problem17_label26.c[4393,4406] [2021-12-21 11:21:41,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:41,802 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:21:41,816 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/Problem17_label26.c[4393,4406] [2021-12-21 11:21:42,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:42,033 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:21:42,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42 WrapperNode [2021-12-21 11:21:42,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:42,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:42,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:21:42,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:21:42,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,236 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-21 11:21:42,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:42,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:21:42,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:21:42,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:21:42,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:21:42,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:21:42,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:21:42,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:21:42,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (1/1) ... [2021-12-21 11:21:42,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:42,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:42,616 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 11:21:42,638 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 11:21:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:21:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:21:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:21:42,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:21:42,700 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:21:42,702 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:21:45,107 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:21:45,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:21:45,129 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:21:45,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:45 BoogieIcfgContainer [2021-12-21 11:21:45,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:21:45,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:21:45,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:21:45,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:21:45,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:21:41" (1/3) ... [2021-12-21 11:21:45,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc3eff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:45, skipping insertion in model container [2021-12-21 11:21:45,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:42" (2/3) ... [2021-12-21 11:21:45,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc3eff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:45, skipping insertion in model container [2021-12-21 11:21:45,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:45" (3/3) ... [2021-12-21 11:21:45,137 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label26.c [2021-12-21 11:21:45,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:21:45,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:21:45,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:21:45,191 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 11:21:45,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:21:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 11:21:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 11:21:45,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:45,223 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] [2021-12-21 11:21:45,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-12-21 11:21:45,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:45,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200588111] [2021-12-21 11:21:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:45,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:45,367 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 11:21:45,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200588111] [2021-12-21 11:21:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200588111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:45,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:45,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:21:45,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633976187] [2021-12-21 11:21:45,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:45,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:45,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:45,396 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 11:21:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:47,570 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-21 11:21:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-12-21 11:21:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:47,594 INFO L225 Difference]: With dead ends: 1642 [2021-12-21 11:21:47,595 INFO L226 Difference]: Without dead ends: 975 [2021-12-21 11:21:47,604 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 11:21:47,606 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 462 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:47,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:21:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-21 11:21:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-21 11:21:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 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 11:21:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-21 11:21:47,680 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 28 [2021-12-21 11:21:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:47,681 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-21 11:21:47,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 11:21:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-21 11:21:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 11:21:47,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:47,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:47,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:21:47,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:47,685 INFO L85 PathProgramCache]: Analyzing trace with hash 176078254, now seen corresponding path program 1 times [2021-12-21 11:21:47,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:47,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702387646] [2021-12-21 11:21:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:47,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:47,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:47,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702387646] [2021-12-21 11:21:47,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702387646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:47,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:47,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:47,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665807650] [2021-12-21 11:21:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:47,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:47,791 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:49,680 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-21 11:21:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 11:21:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:49,706 INFO L225 Difference]: With dead ends: 2814 [2021-12-21 11:21:49,707 INFO L226 Difference]: Without dead ends: 1844 [2021-12-21 11:21:49,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:49,713 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 463 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:49,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:21:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-21 11:21:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-21 11:21:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 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 11:21:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-21 11:21:49,757 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 98 [2021-12-21 11:21:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:49,758 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-21 11:21:49,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-21 11:21:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 11:21:49,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:49,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:49,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:21:49,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1322137327, now seen corresponding path program 1 times [2021-12-21 11:21:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:49,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034053925] [2021-12-21 11:21:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:49,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:49,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:49,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034053925] [2021-12-21 11:21:49,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034053925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:49,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:49,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:21:49,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861819646] [2021-12-21 11:21:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:49,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:49,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:49,891 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 11:21:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:51,604 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-12-21 11:21:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-21 11:21:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:51,614 INFO L225 Difference]: With dead ends: 5395 [2021-12-21 11:21:51,615 INFO L226 Difference]: Without dead ends: 2701 [2021-12-21 11:21:51,618 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 11:21:51,625 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:51,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:21:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-12-21 11:21:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-12-21 11:21:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 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 11:21:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-12-21 11:21:51,668 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 120 [2021-12-21 11:21:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:51,668 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-12-21 11:21:51,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 11:21:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-12-21 11:21:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-21 11:21:51,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:51,672 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:51,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:21:51,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1416376421, now seen corresponding path program 1 times [2021-12-21 11:21:51,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:51,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868894318] [2021-12-21 11:21:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:51,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:51,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868894318] [2021-12-21 11:21:51,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868894318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:51,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:51,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:51,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632001764] [2021-12-21 11:21:51,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:51,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:51,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:51,847 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 11:21:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:53,011 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-12-21 11:21:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-12-21 11:21:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:53,034 INFO L225 Difference]: With dead ends: 7108 [2021-12-21 11:21:53,034 INFO L226 Difference]: Without dead ends: 4409 [2021-12-21 11:21:53,039 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 11:21:53,040 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:53,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:21:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-21 11:21:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-12-21 11:21:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 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 11:21:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-12-21 11:21:53,128 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 180 [2021-12-21 11:21:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-12-21 11:21:53,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 11:21:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-12-21 11:21:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-21 11:21:53,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:53,130 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:21:53,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:21:53,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 744727648, now seen corresponding path program 1 times [2021-12-21 11:21:53,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731846992] [2021-12-21 11:21:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:53,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 11:21:53,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731846992] [2021-12-21 11:21:53,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731846992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:53,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:53,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:53,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302716222] [2021-12-21 11:21:53,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:53,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:53,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:53,199 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 11:21:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:54,797 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-12-21 11:21:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:21:54,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 182 [2021-12-21 11:21:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:54,832 INFO L225 Difference]: With dead ends: 10936 [2021-12-21 11:21:54,847 INFO L226 Difference]: Without dead ends: 6528 [2021-12-21 11:21:54,852 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 11:21:54,852 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 423 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:54,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:21:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-12-21 11:21:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-12-21 11:21:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 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 11:21:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-12-21 11:21:54,981 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 182 [2021-12-21 11:21:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:54,982 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-12-21 11:21:54,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 11:21:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-12-21 11:21:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-21 11:21:54,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:54,987 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:21:54,987 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash -929604570, now seen corresponding path program 1 times [2021-12-21 11:21:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144838223] [2021-12-21 11:21:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:54,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 51 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:55,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:55,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144838223] [2021-12-21 11:21:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144838223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:21:55,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122155051] [2021-12-21 11:21:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:55,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:21:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:55,156 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 11:21:55,190 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 11:21:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:21:55,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:21:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 51 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:56,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:21:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:56,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122155051] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:21:56,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:21:56,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 11:21:56,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110189100] [2021-12-21 11:21:56,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:56,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:21:56,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:21:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:21:56,535 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 11:21:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:21:59,163 INFO L93 Difference]: Finished difference Result 15171 states and 17882 transitions. [2021-12-21 11:21:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:21:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-12-21 11:21:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:21:59,189 INFO L225 Difference]: With dead ends: 15171 [2021-12-21 11:21:59,189 INFO L226 Difference]: Without dead ends: 10791 [2021-12-21 11:21:59,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:21:59,195 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 980 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:21:59,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 145 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:21:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2021-12-21 11:21:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 10789. [2021-12-21 11:21:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10789 states, 10788 states have (on average 1.1710233592880979) internal successors, (12633), 10788 states have internal predecessors, (12633), 0 states have call successors, (0), 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 11:21:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10789 states to 10789 states and 12633 transitions. [2021-12-21 11:21:59,394 INFO L78 Accepts]: Start accepts. Automaton has 10789 states and 12633 transitions. Word has length 248 [2021-12-21 11:21:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:21:59,395 INFO L470 AbstractCegarLoop]: Abstraction has 10789 states and 12633 transitions. [2021-12-21 11:21:59,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 11:21:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10789 states and 12633 transitions. [2021-12-21 11:21:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-21 11:21:59,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:59,398 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:21:59,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:21:59,616 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,SelfDestructingSolverStorable5 [2021-12-21 11:21:59,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2024788157, now seen corresponding path program 1 times [2021-12-21 11:21:59,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:59,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350522730] [2021-12-21 11:21:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:59,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-21 11:21:59,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350522730] [2021-12-21 11:21:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350522730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:59,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:21:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362674259] [2021-12-21 11:21:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:59,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:59,740 INFO L87 Difference]: Start difference. First operand 10789 states and 12633 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 11:22:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:01,296 INFO L93 Difference]: Finished difference Result 23703 states and 27793 transitions. [2021-12-21 11:22:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 260 [2021-12-21 11:22:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:01,316 INFO L225 Difference]: With dead ends: 23703 [2021-12-21 11:22:01,316 INFO L226 Difference]: Without dead ends: 12491 [2021-12-21 11:22:01,325 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 11:22:01,326 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:01,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 842 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12491 states. [2021-12-21 11:22:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12491 to 12491. [2021-12-21 11:22:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12491 states, 12490 states have (on average 1.1501200960768614) internal successors, (14365), 12490 states have internal predecessors, (14365), 0 states have call successors, (0), 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 11:22:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12491 states to 12491 states and 14365 transitions. [2021-12-21 11:22:01,475 INFO L78 Accepts]: Start accepts. Automaton has 12491 states and 14365 transitions. Word has length 260 [2021-12-21 11:22:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:01,475 INFO L470 AbstractCegarLoop]: Abstraction has 12491 states and 14365 transitions. [2021-12-21 11:22:01,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 11:22:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 12491 states and 14365 transitions. [2021-12-21 11:22:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-21 11:22:01,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:01,479 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:01,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:22:01,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1710928730, now seen corresponding path program 1 times [2021-12-21 11:22:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:01,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23370338] [2021-12-21 11:22:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:01,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 11:22:01,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23370338] [2021-12-21 11:22:01,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23370338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:01,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:01,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:01,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384873958] [2021-12-21 11:22:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:01,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:01,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:01,587 INFO L87 Difference]: Start difference. First operand 12491 states and 14365 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 11:22:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:03,167 INFO L93 Difference]: Finished difference Result 27534 states and 31665 transitions. [2021-12-21 11:22:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 300 [2021-12-21 11:22:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:03,185 INFO L225 Difference]: With dead ends: 27534 [2021-12-21 11:22:03,185 INFO L226 Difference]: Without dead ends: 14611 [2021-12-21 11:22:03,194 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 11:22:03,194 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 464 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:03,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 354 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:22:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14611 states. [2021-12-21 11:22:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14611 to 14182. [2021-12-21 11:22:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 1.1389887878146816) internal successors, (16152), 14181 states have internal predecessors, (16152), 0 states have call successors, (0), 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 11:22:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 16152 transitions. [2021-12-21 11:22:03,316 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 16152 transitions. Word has length 300 [2021-12-21 11:22:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:03,317 INFO L470 AbstractCegarLoop]: Abstraction has 14182 states and 16152 transitions. [2021-12-21 11:22:03,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 11:22:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 16152 transitions. [2021-12-21 11:22:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-21 11:22:03,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:03,321 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:03,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:22:03,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash 335207748, now seen corresponding path program 1 times [2021-12-21 11:22:03,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:03,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4772259] [2021-12-21 11:22:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:03,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-21 11:22:03,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4772259] [2021-12-21 11:22:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4772259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:03,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:03,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223523212] [2021-12-21 11:22:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:03,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:03,420 INFO L87 Difference]: Start difference. First operand 14182 states and 16152 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:22:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:05,161 INFO L93 Difference]: Finished difference Result 37316 states and 42354 transitions. [2021-12-21 11:22:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 322 [2021-12-21 11:22:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:05,187 INFO L225 Difference]: With dead ends: 37316 [2021-12-21 11:22:05,187 INFO L226 Difference]: Without dead ends: 23136 [2021-12-21 11:22:05,201 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 11:22:05,202 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 322 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:05,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 825 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-12-21 11:22:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21418. [2021-12-21 11:22:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21418 states, 21417 states have (on average 1.120885278050147) internal successors, (24006), 21417 states have internal predecessors, (24006), 0 states have call successors, (0), 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 11:22:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21418 states to 21418 states and 24006 transitions. [2021-12-21 11:22:05,513 INFO L78 Accepts]: Start accepts. Automaton has 21418 states and 24006 transitions. Word has length 322 [2021-12-21 11:22:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 21418 states and 24006 transitions. [2021-12-21 11:22:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:22:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 21418 states and 24006 transitions. [2021-12-21 11:22:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-21 11:22:05,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:05,518 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:05,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:22:05,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 185029324, now seen corresponding path program 1 times [2021-12-21 11:22:05,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154296339] [2021-12-21 11:22:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:05,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 212 proven. 78 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:05,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154296339] [2021-12-21 11:22:05,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154296339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110150119] [2021-12-21 11:22:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:05,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:05,629 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 11:22:05,666 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 11:22:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:22:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 212 proven. 78 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:06,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:22:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:06,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110150119] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:06,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:22:06,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 11:22:06,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159979672] [2021-12-21 11:22:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:22:06,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:22:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:22:06,977 INFO L87 Difference]: Start difference. First operand 21418 states and 24006 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:22:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:10,089 INFO L93 Difference]: Finished difference Result 51365 states and 57788 transitions. [2021-12-21 11:22:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 327 [2021-12-21 11:22:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:10,124 INFO L225 Difference]: With dead ends: 51365 [2021-12-21 11:22:10,124 INFO L226 Difference]: Without dead ends: 29521 [2021-12-21 11:22:10,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 649 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:22:10,140 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 891 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:10,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 175 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 11:22:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29521 states. [2021-12-21 11:22:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29521 to 28244. [2021-12-21 11:22:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 1.1312537619941225) internal successors, (31950), 28243 states have internal predecessors, (31950), 0 states have call successors, (0), 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 11:22:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 31950 transitions. [2021-12-21 11:22:10,408 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 31950 transitions. Word has length 327 [2021-12-21 11:22:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:10,409 INFO L470 AbstractCegarLoop]: Abstraction has 28244 states and 31950 transitions. [2021-12-21 11:22:10,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:22:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 31950 transitions. [2021-12-21 11:22:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-21 11:22:10,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:10,414 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 11:22:10,434 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 11:22:10,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 11:22:10,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 182989261, now seen corresponding path program 1 times [2021-12-21 11:22:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:10,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619043858] [2021-12-21 11:22:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:10,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:10,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619043858] [2021-12-21 11:22:10,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619043858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502493443] [2021-12-21 11:22:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:10,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:10,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:22:10,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:22:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 11:22:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:12,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:22:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502493443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:22:13,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:22:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2021-12-21 11:22:13,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219444109] [2021-12-21 11:22:13,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:22:13,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:22:13,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:22:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:22:13,828 INFO L87 Difference]: Start difference. First operand 28244 states and 31950 transitions. Second operand has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 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 11:22:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:19,490 INFO L93 Difference]: Finished difference Result 64690 states and 72502 transitions. [2021-12-21 11:22:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 11:22:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 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 340 [2021-12-21 11:22:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:19,527 INFO L225 Difference]: With dead ends: 64690 [2021-12-21 11:22:19,527 INFO L226 Difference]: Without dead ends: 36023 [2021-12-21 11:22:19,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 675 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-21 11:22:19,545 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2659 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2659 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 8745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1925 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2659 Valid, 518 Invalid, 8745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 6381 Invalid, 0 Unknown, 1925 Unchecked, 5.3s Time] [2021-12-21 11:22:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36023 states. [2021-12-21 11:22:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36023 to 33024. [2021-12-21 11:22:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33024 states, 33023 states have (on average 1.1206734700057535) internal successors, (37008), 33023 states have internal predecessors, (37008), 0 states have call successors, (0), 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 11:22:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33024 states to 33024 states and 37008 transitions. [2021-12-21 11:22:19,849 INFO L78 Accepts]: Start accepts. Automaton has 33024 states and 37008 transitions. Word has length 340 [2021-12-21 11:22:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:19,850 INFO L470 AbstractCegarLoop]: Abstraction has 33024 states and 37008 transitions. [2021-12-21 11:22:19,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 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 11:22:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33024 states and 37008 transitions. [2021-12-21 11:22:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-21 11:22:19,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:19,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:19,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:22:20,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:20,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -202956488, now seen corresponding path program 1 times [2021-12-21 11:22:20,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137216275] [2021-12-21 11:22:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:20,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:20,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137216275] [2021-12-21 11:22:20,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137216275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:20,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:20,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:20,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520201479] [2021-12-21 11:22:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:22:20,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:22:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:22:20,197 INFO L87 Difference]: Start difference. First operand 33024 states and 37008 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 11:22:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:22,560 INFO L93 Difference]: Finished difference Result 68491 states and 76657 transitions. [2021-12-21 11:22:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 367 [2021-12-21 11:22:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:22,596 INFO L225 Difference]: With dead ends: 68491 [2021-12-21 11:22:22,597 INFO L226 Difference]: Without dead ends: 35574 [2021-12-21 11:22:22,617 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 11:22:22,618 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 595 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:22,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 247 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:22:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35574 states. [2021-12-21 11:22:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35574 to 33024. [2021-12-21 11:22:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33024 states, 33023 states have (on average 1.1206431880810344) internal successors, (37007), 33023 states have internal predecessors, (37007), 0 states have call successors, (0), 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 11:22:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33024 states to 33024 states and 37007 transitions. [2021-12-21 11:22:22,923 INFO L78 Accepts]: Start accepts. Automaton has 33024 states and 37007 transitions. Word has length 367 [2021-12-21 11:22:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:22,924 INFO L470 AbstractCegarLoop]: Abstraction has 33024 states and 37007 transitions. [2021-12-21 11:22:22,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 11:22:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33024 states and 37007 transitions. [2021-12-21 11:22:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-21 11:22:22,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:22,930 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 11:22:22,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:22:22,930 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1005236947, now seen corresponding path program 1 times [2021-12-21 11:22:22,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:22,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990542996] [2021-12-21 11:22:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:22,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:22:23,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990542996] [2021-12-21 11:22:23,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990542996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:23,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:23,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:23,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609209588] [2021-12-21 11:22:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:23,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:23,070 INFO L87 Difference]: Start difference. First operand 33024 states and 37007 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:22:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:24,964 INFO L93 Difference]: Finished difference Result 81725 states and 92143 transitions. [2021-12-21 11:22:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 383 [2021-12-21 11:22:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:25,023 INFO L225 Difference]: With dead ends: 81725 [2021-12-21 11:22:25,024 INFO L226 Difference]: Without dead ends: 48804 [2021-12-21 11:22:25,044 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 11:22:25,045 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 370 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 275 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48804 states. [2021-12-21 11:22:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48804 to 47503. [2021-12-21 11:22:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47503 states, 47502 states have (on average 1.1183739632015495) internal successors, (53125), 47502 states have internal predecessors, (53125), 0 states have call successors, (0), 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 11:22:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47503 states to 47503 states and 53125 transitions. [2021-12-21 11:22:25,473 INFO L78 Accepts]: Start accepts. Automaton has 47503 states and 53125 transitions. Word has length 383 [2021-12-21 11:22:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:25,474 INFO L470 AbstractCegarLoop]: Abstraction has 47503 states and 53125 transitions. [2021-12-21 11:22:25,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:22:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 47503 states and 53125 transitions. [2021-12-21 11:22:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-21 11:22:25,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:25,480 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:25,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:22:25,480 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -166528410, now seen corresponding path program 1 times [2021-12-21 11:22:25,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:25,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708249263] [2021-12-21 11:22:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:25,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 511 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:25,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708249263] [2021-12-21 11:22:25,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708249263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566899008] [2021-12-21 11:22:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:25,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:25,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:25,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:22:25,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:22:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:22:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:26,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:22:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566899008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:26,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:22:26,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-21 11:22:26,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017957723] [2021-12-21 11:22:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:26,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:22:26,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:22:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:22:26,686 INFO L87 Difference]: Start difference. First operand 47503 states and 53125 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 11:22:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:28,519 INFO L93 Difference]: Finished difference Result 96599 states and 107913 transitions. [2021-12-21 11:22:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 422 [2021-12-21 11:22:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:28,574 INFO L225 Difference]: With dead ends: 96599 [2021-12-21 11:22:28,574 INFO L226 Difference]: Without dead ends: 49628 [2021-12-21 11:22:28,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:22:28,604 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 803 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:28,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 355 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49628 states. [2021-12-21 11:22:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49628 to 48778. [2021-12-21 11:22:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48778 states, 48777 states have (on average 1.1159357894089428) internal successors, (54432), 48777 states have internal predecessors, (54432), 0 states have call successors, (0), 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 11:22:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48778 states to 48778 states and 54432 transitions. [2021-12-21 11:22:29,061 INFO L78 Accepts]: Start accepts. Automaton has 48778 states and 54432 transitions. Word has length 422 [2021-12-21 11:22:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:29,062 INFO L470 AbstractCegarLoop]: Abstraction has 48778 states and 54432 transitions. [2021-12-21 11:22:29,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 11:22:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 48778 states and 54432 transitions. [2021-12-21 11:22:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-12-21 11:22:29,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:29,067 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:29,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:22:29,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:29,283 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:29,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1024507897, now seen corresponding path program 1 times [2021-12-21 11:22:29,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:29,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034161251] [2021-12-21 11:22:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:29,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-21 11:22:29,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:29,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034161251] [2021-12-21 11:22:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034161251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:29,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575399315] [2021-12-21 11:22:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:29,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:29,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:29,571 INFO L87 Difference]: Start difference. First operand 48778 states and 54432 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 11:22:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:31,447 INFO L93 Difference]: Finished difference Result 114475 states and 127617 transitions. [2021-12-21 11:22:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 428 [2021-12-21 11:22:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:31,521 INFO L225 Difference]: With dead ends: 114475 [2021-12-21 11:22:31,521 INFO L226 Difference]: Without dead ends: 64091 [2021-12-21 11:22:31,558 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 11:22:31,558 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 446 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:31,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 604 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64091 states. [2021-12-21 11:22:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64091 to 59397. [2021-12-21 11:22:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59397 states, 59396 states have (on average 1.1050575796349922) internal successors, (65636), 59396 states have internal predecessors, (65636), 0 states have call successors, (0), 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 11:22:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59397 states to 59397 states and 65636 transitions. [2021-12-21 11:22:32,609 INFO L78 Accepts]: Start accepts. Automaton has 59397 states and 65636 transitions. Word has length 428 [2021-12-21 11:22:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:32,609 INFO L470 AbstractCegarLoop]: Abstraction has 59397 states and 65636 transitions. [2021-12-21 11:22:32,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 11:22:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 59397 states and 65636 transitions. [2021-12-21 11:22:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-12-21 11:22:32,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:32,617 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:22:32,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:22:32,617 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1533610740, now seen corresponding path program 1 times [2021-12-21 11:22:32,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556769064] [2021-12-21 11:22:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:32,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-21 11:22:32,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:32,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556769064] [2021-12-21 11:22:32,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556769064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:32,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:32,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989269549] [2021-12-21 11:22:32,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:33,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:33,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:33,093 INFO L87 Difference]: Start difference. First operand 59397 states and 65636 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 11:22:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:35,087 INFO L93 Difference]: Finished difference Result 136578 states and 150995 transitions. [2021-12-21 11:22:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 452 [2021-12-21 11:22:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:35,256 INFO L225 Difference]: With dead ends: 136578 [2021-12-21 11:22:35,256 INFO L226 Difference]: Without dead ends: 78138 [2021-12-21 11:22:35,278 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 11:22:35,279 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:35,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 249 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78138 states. [2021-12-21 11:22:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78138 to 74707. [2021-12-21 11:22:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74707 states, 74706 states have (on average 1.0994431504832276) internal successors, (82135), 74706 states have internal predecessors, (82135), 0 states have call successors, (0), 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 11:22:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74707 states to 74707 states and 82135 transitions. [2021-12-21 11:22:36,096 INFO L78 Accepts]: Start accepts. Automaton has 74707 states and 82135 transitions. Word has length 452 [2021-12-21 11:22:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:36,096 INFO L470 AbstractCegarLoop]: Abstraction has 74707 states and 82135 transitions. [2021-12-21 11:22:36,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 11:22:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 74707 states and 82135 transitions. [2021-12-21 11:22:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-12-21 11:22:36,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:36,102 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:36,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:22:36,102 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1646221535, now seen corresponding path program 1 times [2021-12-21 11:22:36,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:36,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672482427] [2021-12-21 11:22:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:36,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-21 11:22:36,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672482427] [2021-12-21 11:22:36,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672482427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:36,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:36,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130944633] [2021-12-21 11:22:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:36,430 INFO L87 Difference]: Start difference. First operand 74707 states and 82135 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 11:22:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:38,395 INFO L93 Difference]: Finished difference Result 171032 states and 188052 transitions. [2021-12-21 11:22:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 453 [2021-12-21 11:22:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:38,499 INFO L225 Difference]: With dead ends: 171032 [2021-12-21 11:22:38,500 INFO L226 Difference]: Without dead ends: 96853 [2021-12-21 11:22:38,543 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 11:22:38,544 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 479 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:38,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 194 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96853 states. [2021-12-21 11:22:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96853 to 95551. [2021-12-21 11:22:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95551 states, 95550 states have (on average 1.0967974882260596) internal successors, (104799), 95550 states have internal predecessors, (104799), 0 states have call successors, (0), 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 11:22:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95551 states to 95551 states and 104799 transitions. [2021-12-21 11:22:39,662 INFO L78 Accepts]: Start accepts. Automaton has 95551 states and 104799 transitions. Word has length 453 [2021-12-21 11:22:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:39,662 INFO L470 AbstractCegarLoop]: Abstraction has 95551 states and 104799 transitions. [2021-12-21 11:22:39,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 11:22:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 95551 states and 104799 transitions. [2021-12-21 11:22:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-21 11:22:39,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:39,668 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:39,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:22:39,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2101201011, now seen corresponding path program 1 times [2021-12-21 11:22:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:39,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332855352] [2021-12-21 11:22:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:39,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 554 proven. 103 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:40,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332855352] [2021-12-21 11:22:40,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332855352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324591856] [2021-12-21 11:22:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:40,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:40,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:22:40,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:22:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 11:22:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 388 proven. 269 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:41,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:22:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 552 proven. 105 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 11:22:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324591856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:22:43,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:22:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2021-12-21 11:22:43,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446596758] [2021-12-21 11:22:43,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:22:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 11:22:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 11:22:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-21 11:22:43,306 INFO L87 Difference]: Start difference. First operand 95551 states and 104799 transitions. Second operand has 12 states, 12 states have (on average 82.0) internal successors, (984), 12 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)