./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.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 5a9891cd4c5f04616b7fa480ff51a2b34c717470141ef1b888630cca6069f53e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:01:16,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:01:16,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:01:16,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:01:16,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:01:16,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:01:16,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:01:16,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:01:16,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:01:16,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:01:16,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:01:16,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:01:16,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:01:16,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:01:16,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:01:16,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:01:16,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:01:16,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:01:16,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:01:16,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:01:16,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:01:16,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:01:16,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:01:16,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:01:16,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:01:16,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:01:16,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:01:16,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:01:16,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:01:16,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:01:16,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:01:16,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:01:16,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:01:16,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:01:16,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:01:16,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:01:16,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:01:16,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:01:16,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:01:16,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:01:16,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:01:16,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:01:16,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:01:16,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:01:16,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:01:16,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:01:16,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:01:16,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:01:16,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:01:16,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:01:16,241 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:01:16,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:01:16,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:01:16,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:01:16,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:01:16,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:01:16,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:01:16,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:01:16,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:01:16,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:01:16,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:01:16,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:01:16,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:01:16,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:01:16,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:01:16,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:01:16,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:01:16,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:01:16,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:01:16,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:01:16,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:01:16,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a9891cd4c5f04616b7fa480ff51a2b34c717470141ef1b888630cca6069f53e [2021-12-15 12:01:16,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:01:16,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:01:16,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:01:16,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:01:16,555 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:01:16,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-12-15 12:01:16,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acb25df4/0c65c043a1cf462f936c84d496cf8e1e/FLAGbee20c921 [2021-12-15 12:01:17,414 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:01:17,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-12-15 12:01:17,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acb25df4/0c65c043a1cf462f936c84d496cf8e1e/FLAGbee20c921 [2021-12-15 12:01:17,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1acb25df4/0c65c043a1cf462f936c84d496cf8e1e [2021-12-15 12:01:17,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:01:17,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:01:17,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:01:17,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:01:17,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:01:17,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:01:17" (1/1) ... [2021-12-15 12:01:17,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1ad90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:17, skipping insertion in model container [2021-12-15 12:01:17,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:01:17" (1/1) ... [2021-12-15 12:01:17,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:01:17,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:01:17,982 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c[6450,6463] [2021-12-15 12:01:18,019 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c[9957,9970] [2021-12-15 12:01:18,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:01:18,656 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:01:18,690 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c[6450,6463] [2021-12-15 12:01:18,700 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c[9957,9970] [2021-12-15 12:01:19,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:01:19,164 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:01:19,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19 WrapperNode [2021-12-15 12:01:19,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:01:19,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:01:19,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:01:19,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:01:19,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,514 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-15 12:01:19,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:01:19,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:01:19,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:01:19,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:01:19,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:19,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:20,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:01:20,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:01:20,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:01:20,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:01:20,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (1/1) ... [2021-12-15 12:01:20,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:01:20,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:01:20,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:01:20,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:01:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:01:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:01:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:01:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:01:20,459 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:01:20,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:01:23,961 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:01:23,976 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:01:23,976 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:01:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:01:23 BoogieIcfgContainer [2021-12-15 12:01:23,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:01:23,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:01:23,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:01:23,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:01:23,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:01:17" (1/3) ... [2021-12-15 12:01:23,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb2690b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:01:23, skipping insertion in model container [2021-12-15 12:01:23,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:01:19" (2/3) ... [2021-12-15 12:01:23,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb2690b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:01:23, skipping insertion in model container [2021-12-15 12:01:23,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:01:23" (3/3) ... [2021-12-15 12:01:23,987 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-12-15 12:01:23,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:01:23,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:01:24,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:01:24,043 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:01:24,043 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:01:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 12:01:24,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:24,081 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] [2021-12-15 12:01:24,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-15 12:01:24,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136974257] [2021-12-15 12:01:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:24,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:24,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136974257] [2021-12-15 12:01:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136974257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:24,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:01:24,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596972836] [2021-12-15 12:01:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:24,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 12:01:24,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 12:01:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:01:24,263 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:24,320 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-15 12:01:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 12:01:24,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-15 12:01:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:24,345 INFO L225 Difference]: With dead ends: 1736 [2021-12-15 12:01:24,346 INFO L226 Difference]: Without dead ends: 814 [2021-12-15 12:01:24,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:01:24,356 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:24,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-15 12:01:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-15 12:01:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-15 12:01:24,457 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-15 12:01:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:24,457 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-15 12:01:24,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-15 12:01:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 12:01:24,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:24,460 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] [2021-12-15 12:01:24,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:01:24,460 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-15 12:01:24,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:24,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366184854] [2021-12-15 12:01:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:24,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:24,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366184854] [2021-12-15 12:01:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366184854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:24,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142269768] [2021-12-15 12:01:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:24,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:24,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:24,531 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:24,661 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-15 12:01:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:01:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-15 12:01:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:24,667 INFO L225 Difference]: With dead ends: 856 [2021-12-15 12:01:24,679 INFO L226 Difference]: Without dead ends: 814 [2021-12-15 12:01:24,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:01:24,682 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:24,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-15 12:01:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-15 12:01:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-15 12:01:24,707 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-15 12:01:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:24,707 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-15 12:01:24,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-15 12:01:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 12:01:24,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:24,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:24,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:01:24,718 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1008444205, now seen corresponding path program 1 times [2021-12-15 12:01:24,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344610631] [2021-12-15 12:01:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:24,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:24,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344610631] [2021-12-15 12:01:24,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344610631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:24,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:24,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:01:24,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237563990] [2021-12-15 12:01:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:24,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:24,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:24,833 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:28,197 INFO L93 Difference]: Finished difference Result 2318 states and 4393 transitions. [2021-12-15 12:01:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-15 12:01:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:28,206 INFO L225 Difference]: With dead ends: 2318 [2021-12-15 12:01:28,207 INFO L226 Difference]: Without dead ends: 1565 [2021-12-15 12:01:28,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,210 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 869 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:28,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 509 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 12:01:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-15 12:01:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-15 12:01:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6295585412667946) internal successors, (2547), 1564 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2547 transitions. [2021-12-15 12:01:28,246 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2547 transitions. Word has length 30 [2021-12-15 12:01:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:28,247 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2547 transitions. [2021-12-15 12:01:28,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2547 transitions. [2021-12-15 12:01:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 12:01:28,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:28,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:28,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:01:28,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-15 12:01:28,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:28,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766423658] [2021-12-15 12:01:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:28,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:28,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766423658] [2021-12-15 12:01:28,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766423658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:28,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:28,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:28,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14163526] [2021-12-15 12:01:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:28,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:28,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,300 INFO L87 Difference]: Start difference. First operand 1565 states and 2547 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:28,332 INFO L93 Difference]: Finished difference Result 1635 states and 2655 transitions. [2021-12-15 12:01:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 12:01:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:28,339 INFO L225 Difference]: With dead ends: 1635 [2021-12-15 12:01:28,339 INFO L226 Difference]: Without dead ends: 1597 [2021-12-15 12:01:28,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,347 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:28,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-15 12:01:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1595. [2021-12-15 12:01:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.628374136848713) internal successors, (2594), 1594 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2594 transitions. [2021-12-15 12:01:28,387 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2594 transitions. Word has length 41 [2021-12-15 12:01:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2594 transitions. [2021-12-15 12:01:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2594 transitions. [2021-12-15 12:01:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 12:01:28,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:28,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:28,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:01:28,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-15 12:01:28,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:28,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812018168] [2021-12-15 12:01:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:28,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:28,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812018168] [2021-12-15 12:01:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812018168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:28,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:28,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:28,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661250989] [2021-12-15 12:01:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:28,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:28,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,434 INFO L87 Difference]: Start difference. First operand 1595 states and 2594 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:28,466 INFO L93 Difference]: Finished difference Result 1719 states and 2786 transitions. [2021-12-15 12:01:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 12:01:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:28,474 INFO L225 Difference]: With dead ends: 1719 [2021-12-15 12:01:28,474 INFO L226 Difference]: Without dead ends: 1651 [2021-12-15 12:01:28,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,476 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:28,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-12-15 12:01:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2021-12-15 12:01:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1647 states have (on average 1.6253794778384942) internal successors, (2677), 1648 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2677 transitions. [2021-12-15 12:01:28,512 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2677 transitions. Word has length 41 [2021-12-15 12:01:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:28,513 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2677 transitions. [2021-12-15 12:01:28,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2677 transitions. [2021-12-15 12:01:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 12:01:28,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:28,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:28,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:01:28,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-15 12:01:28,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207634028] [2021-12-15 12:01:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:28,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:28,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207634028] [2021-12-15 12:01:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207634028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:28,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:28,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878820122] [2021-12-15 12:01:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:28,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:28,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:28,563 INFO L87 Difference]: Start difference. First operand 1649 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:28,726 INFO L93 Difference]: Finished difference Result 2381 states and 3811 transitions. [2021-12-15 12:01:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:01:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 12:01:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:28,737 INFO L225 Difference]: With dead ends: 2381 [2021-12-15 12:01:28,737 INFO L226 Difference]: Without dead ends: 2259 [2021-12-15 12:01:28,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:01:28,739 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:28,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-12-15 12:01:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1769. [2021-12-15 12:01:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-15 12:01:28,788 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 41 [2021-12-15 12:01:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-15 12:01:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-15 12:01:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 12:01:28,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:28,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:28,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:01:28,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-15 12:01:28,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155968361] [2021-12-15 12:01:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:28,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:28,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:28,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155968361] [2021-12-15 12:01:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155968361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:28,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618152343] [2021-12-15 12:01:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:28,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,874 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:28,920 INFO L93 Difference]: Finished difference Result 2209 states and 3519 transitions. [2021-12-15 12:01:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 12:01:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:28,930 INFO L225 Difference]: With dead ends: 2209 [2021-12-15 12:01:28,931 INFO L226 Difference]: Without dead ends: 1967 [2021-12-15 12:01:28,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:28,933 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-15 12:01:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1957. [2021-12-15 12:01:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5964194373401535) internal successors, (3121), 1956 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3121 transitions. [2021-12-15 12:01:28,989 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3121 transitions. Word has length 43 [2021-12-15 12:01:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:28,989 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3121 transitions. [2021-12-15 12:01:28,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3121 transitions. [2021-12-15 12:01:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 12:01:28,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:28,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:28,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:01:28,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:28,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-15 12:01:28,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:28,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663975897] [2021-12-15 12:01:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:28,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:29,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663975897] [2021-12-15 12:01:29,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663975897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:29,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902549554] [2021-12-15 12:01:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:29,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:29,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:29,134 INFO L87 Difference]: Start difference. First operand 1957 states and 3121 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:29,221 INFO L93 Difference]: Finished difference Result 2389 states and 3755 transitions. [2021-12-15 12:01:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:01:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 12:01:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:29,230 INFO L225 Difference]: With dead ends: 2389 [2021-12-15 12:01:29,231 INFO L226 Difference]: Without dead ends: 1959 [2021-12-15 12:01:29,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:01:29,235 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:29,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-12-15 12:01:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1957. [2021-12-15 12:01:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5923273657289003) internal successors, (3113), 1956 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3113 transitions. [2021-12-15 12:01:29,288 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3113 transitions. Word has length 43 [2021-12-15 12:01:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3113 transitions. [2021-12-15 12:01:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3113 transitions. [2021-12-15 12:01:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 12:01:29,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:29,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:01:29,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-15 12:01:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695999221] [2021-12-15 12:01:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:29,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:29,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:29,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695999221] [2021-12-15 12:01:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695999221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:29,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:29,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:29,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371070847] [2021-12-15 12:01:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:29,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:29,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:29,352 INFO L87 Difference]: Start difference. First operand 1957 states and 3113 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:29,440 INFO L93 Difference]: Finished difference Result 2291 states and 3585 transitions. [2021-12-15 12:01:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 12:01:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-15 12:01:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:29,451 INFO L225 Difference]: With dead ends: 2291 [2021-12-15 12:01:29,451 INFO L226 Difference]: Without dead ends: 2289 [2021-12-15 12:01:29,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:01:29,454 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:29,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-12-15 12:01:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1981. [2021-12-15 12:01:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1979 states have (on average 1.583122789287519) internal successors, (3133), 1980 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3133 transitions. [2021-12-15 12:01:29,510 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3133 transitions. Word has length 44 [2021-12-15 12:01:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:29,511 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3133 transitions. [2021-12-15 12:01:29,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3133 transitions. [2021-12-15 12:01:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 12:01:29,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:29,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:29,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:01:29,516 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:29,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-15 12:01:29,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:29,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188384421] [2021-12-15 12:01:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:29,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:29,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188384421] [2021-12-15 12:01:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188384421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:29,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:29,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:29,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465529468] [2021-12-15 12:01:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:29,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:29,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:29,561 INFO L87 Difference]: Start difference. First operand 1981 states and 3133 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:29,608 INFO L93 Difference]: Finished difference Result 2452 states and 3811 transitions. [2021-12-15 12:01:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 12:01:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:29,617 INFO L225 Difference]: With dead ends: 2452 [2021-12-15 12:01:29,617 INFO L226 Difference]: Without dead ends: 2185 [2021-12-15 12:01:29,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:29,619 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:29,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-12-15 12:01:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-12-15 12:01:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2181 states have (on average 1.5639614855570838) internal successors, (3411), 2182 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3411 transitions. [2021-12-15 12:01:29,685 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3411 transitions. Word has length 45 [2021-12-15 12:01:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:29,685 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3411 transitions. [2021-12-15 12:01:29,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3411 transitions. [2021-12-15 12:01:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:01:29,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:29,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:01:29,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-15 12:01:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868194725] [2021-12-15 12:01:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:29,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 12:01:29,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868194725] [2021-12-15 12:01:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868194725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:29,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887632486] [2021-12-15 12:01:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:29,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:29,745 INFO L87 Difference]: Start difference. First operand 2183 states and 3411 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:29,897 INFO L93 Difference]: Finished difference Result 4287 states and 6363 transitions. [2021-12-15 12:01:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:01:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 64 [2021-12-15 12:01:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:29,912 INFO L225 Difference]: With dead ends: 4287 [2021-12-15 12:01:29,913 INFO L226 Difference]: Without dead ends: 3633 [2021-12-15 12:01:29,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:01:29,916 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3084 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3084 SdHoareTripleChecker+Valid, 3199 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:29,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3084 Valid, 3199 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-12-15 12:01:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2835. [2021-12-15 12:01:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2833 states have (on average 1.524532297917402) internal successors, (4319), 2834 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4319 transitions. [2021-12-15 12:01:30,017 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4319 transitions. Word has length 64 [2021-12-15 12:01:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:30,017 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 4319 transitions. [2021-12-15 12:01:30,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4319 transitions. [2021-12-15 12:01:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 12:01:30,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:30,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:01:30,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:01:30,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-15 12:01:30,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:30,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927546453] [2021-12-15 12:01:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:30,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:01:30,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927546453] [2021-12-15 12:01:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927546453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:30,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:30,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:30,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901742720] [2021-12-15 12:01:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:30,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:30,087 INFO L87 Difference]: Start difference. First operand 2835 states and 4319 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:30,300 INFO L93 Difference]: Finished difference Result 4939 states and 7271 transitions. [2021-12-15 12:01:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:01:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 64 [2021-12-15 12:01:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:30,318 INFO L225 Difference]: With dead ends: 4939 [2021-12-15 12:01:30,319 INFO L226 Difference]: Without dead ends: 4285 [2021-12-15 12:01:30,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:01:30,323 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:30,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-12-15 12:01:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3815. [2021-12-15 12:01:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3813 states have (on average 1.4872803566745345) internal successors, (5671), 3814 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 5671 transitions. [2021-12-15 12:01:30,491 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 5671 transitions. Word has length 64 [2021-12-15 12:01:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:30,492 INFO L470 AbstractCegarLoop]: Abstraction has 3815 states and 5671 transitions. [2021-12-15 12:01:30,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 5671 transitions. [2021-12-15 12:01:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:01:30,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:30,495 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:30,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:01:30,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-15 12:01:30,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:30,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148046712] [2021-12-15 12:01:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:30,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:30,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:30,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148046712] [2021-12-15 12:01:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148046712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:30,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852451252] [2021-12-15 12:01:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:30,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:30,540 INFO L87 Difference]: Start difference. First operand 3815 states and 5671 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:30,624 INFO L93 Difference]: Finished difference Result 5465 states and 7995 transitions. [2021-12-15 12:01:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:01:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:30,633 INFO L225 Difference]: With dead ends: 5465 [2021-12-15 12:01:30,634 INFO L226 Difference]: Without dead ends: 3179 [2021-12-15 12:01:30,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:30,638 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-12-15 12:01:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3177. [2021-12-15 12:01:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3175 states have (on average 1.506771653543307) internal successors, (4784), 3176 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4784 transitions. [2021-12-15 12:01:30,747 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4784 transitions. Word has length 66 [2021-12-15 12:01:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:30,748 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 4784 transitions. [2021-12-15 12:01:30,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4784 transitions. [2021-12-15 12:01:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:01:30,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:30,749 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:30,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:01:30,750 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-15 12:01:30,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142434861] [2021-12-15 12:01:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:30,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:01:30,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142434861] [2021-12-15 12:01:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142434861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:30,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:30,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:01:30,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936234176] [2021-12-15 12:01:30,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:30,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:01:30,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:01:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:01:30,801 INFO L87 Difference]: Start difference. First operand 3177 states and 4784 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:30,950 INFO L93 Difference]: Finished difference Result 4577 states and 6756 transitions. [2021-12-15 12:01:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:01:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 12:01:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:30,960 INFO L225 Difference]: With dead ends: 4577 [2021-12-15 12:01:30,960 INFO L226 Difference]: Without dead ends: 4111 [2021-12-15 12:01:30,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:01:30,963 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3076 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:30,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 3207 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-12-15 12:01:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 3641. [2021-12-15 12:01:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3639 states have (on average 1.4927177796097828) internal successors, (5432), 3640 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5432 transitions. [2021-12-15 12:01:31,129 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5432 transitions. Word has length 66 [2021-12-15 12:01:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:31,129 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5432 transitions. [2021-12-15 12:01:31,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5432 transitions. [2021-12-15 12:01:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:01:31,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:31,135 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:31,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:01:31,136 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-15 12:01:31,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:31,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117685099] [2021-12-15 12:01:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:31,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117685099] [2021-12-15 12:01:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117685099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:01:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732590557] [2021-12-15 12:01:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:31,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:01:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:01:31,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:01:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 12:01:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 12:01:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:01:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:01:31,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:01:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:01:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732590557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:01:32,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:01:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-15 12:01:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722528225] [2021-12-15 12:01:32,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:01:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 12:01:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 12:01:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-15 12:01:32,053 INFO L87 Difference]: Start difference. First operand 3641 states and 5432 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:35,189 INFO L93 Difference]: Finished difference Result 22942 states and 31825 transitions. [2021-12-15 12:01:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 12:01:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 67 [2021-12-15 12:01:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:35,287 INFO L225 Difference]: With dead ends: 22942 [2021-12-15 12:01:35,288 INFO L226 Difference]: Without dead ends: 20852 [2021-12-15 12:01:35,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-15 12:01:35,302 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 18913 mSDsluCounter, 5288 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18913 SdHoareTripleChecker+Valid, 6855 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:35,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18913 Valid, 6855 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 12:01:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20852 states. [2021-12-15 12:01:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20852 to 12505. [2021-12-15 12:01:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 12503 states have (on average 1.3677517395825003) internal successors, (17101), 12504 states have internal predecessors, (17101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 17101 transitions. [2021-12-15 12:01:35,942 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 17101 transitions. Word has length 67 [2021-12-15 12:01:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:35,942 INFO L470 AbstractCegarLoop]: Abstraction has 12505 states and 17101 transitions. [2021-12-15 12:01:35,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 17101 transitions. [2021-12-15 12:01:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:01:35,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:35,945 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:35,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 12:01:36,170 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,SelfDestructingSolverStorable14 [2021-12-15 12:01:36,170 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-15 12:01:36,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:36,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594365988] [2021-12-15 12:01:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:36,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:36,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:36,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594365988] [2021-12-15 12:01:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594365988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:01:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455132801] [2021-12-15 12:01:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:36,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:01:36,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:01:36,412 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) [2021-12-15 12:01:36,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 12:01:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:36,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:01:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:01:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:37,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:01:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:37,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455132801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:01:37,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:01:37,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-15 12:01:37,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605331170] [2021-12-15 12:01:37,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:01:37,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 12:01:37,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:37,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 12:01:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-15 12:01:37,872 INFO L87 Difference]: Start difference. First operand 12505 states and 17101 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:41,820 INFO L93 Difference]: Finished difference Result 69077 states and 91427 transitions. [2021-12-15 12:01:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 12:01:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 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 68 [2021-12-15 12:01:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:41,959 INFO L225 Difference]: With dead ends: 69077 [2021-12-15 12:01:41,959 INFO L226 Difference]: Without dead ends: 59809 [2021-12-15 12:01:41,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-15 12:01:41,990 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 11147 mSDsluCounter, 5135 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11147 SdHoareTripleChecker+Valid, 6683 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:41,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11147 Valid, 6683 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 12:01:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59809 states. [2021-12-15 12:01:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59809 to 26974. [2021-12-15 12:01:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26974 states, 26972 states have (on average 1.3456918285629542) internal successors, (36296), 26973 states have internal predecessors, (36296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26974 states to 26974 states and 36296 transitions. [2021-12-15 12:01:43,885 INFO L78 Accepts]: Start accepts. Automaton has 26974 states and 36296 transitions. Word has length 68 [2021-12-15 12:01:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:43,885 INFO L470 AbstractCegarLoop]: Abstraction has 26974 states and 36296 transitions. [2021-12-15 12:01:43,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 26974 states and 36296 transitions. [2021-12-15 12:01:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:01:43,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:43,889 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:43,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 12:01:44,103 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,SelfDestructingSolverStorable15 [2021-12-15 12:01:44,104 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-15 12:01:44,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911433771] [2021-12-15 12:01:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:44,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:44,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911433771] [2021-12-15 12:01:44,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911433771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:01:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701273462] [2021-12-15 12:01:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:44,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:01:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:01:44,373 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) [2021-12-15 12:01:44,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 12:01:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:01:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:01:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:01:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:45,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701273462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:01:45,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:01:45,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-15 12:01:45,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736096334] [2021-12-15 12:01:45,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:01:45,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 12:01:45,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:45,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 12:01:45,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-15 12:01:45,779 INFO L87 Difference]: Start difference. First operand 26974 states and 36296 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:51,109 INFO L93 Difference]: Finished difference Result 114365 states and 150745 transitions. [2021-12-15 12:01:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 12:01:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 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 68 [2021-12-15 12:01:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:51,320 INFO L225 Difference]: With dead ends: 114365 [2021-12-15 12:01:51,323 INFO L226 Difference]: Without dead ends: 92142 [2021-12-15 12:01:51,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 12:01:51,381 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 15512 mSDsluCounter, 3462 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15512 SdHoareTripleChecker+Valid, 4993 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:51,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15512 Valid, 4993 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:01:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92142 states. [2021-12-15 12:01:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92142 to 54011. [2021-12-15 12:01:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54011 states, 54009 states have (on average 1.3203725305041751) internal successors, (71312), 54010 states have internal predecessors, (71312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54011 states to 54011 states and 71312 transitions. [2021-12-15 12:01:54,929 INFO L78 Accepts]: Start accepts. Automaton has 54011 states and 71312 transitions. Word has length 68 [2021-12-15 12:01:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 54011 states and 71312 transitions. [2021-12-15 12:01:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54011 states and 71312 transitions. [2021-12-15 12:01:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:01:54,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:54,934 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:54,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 12:01:55,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:01:55,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-15 12:01:55,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:55,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971669772] [2021-12-15 12:01:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:55,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:55,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971669772] [2021-12-15 12:01:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971669772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:55,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:55,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:55,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656383798] [2021-12-15 12:01:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:55,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:55,210 INFO L87 Difference]: Start difference. First operand 54011 states and 71312 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:56,819 INFO L93 Difference]: Finished difference Result 78449 states and 102855 transitions. [2021-12-15 12:01:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:56,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-15 12:01:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:56,875 INFO L225 Difference]: With dead ends: 78449 [2021-12-15 12:01:56,876 INFO L226 Difference]: Without dead ends: 31369 [2021-12-15 12:01:56,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:56,931 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:01:56,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:01:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31369 states. [2021-12-15 12:01:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31369 to 30941. [2021-12-15 12:01:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30941 states, 30939 states have (on average 1.28963444196645) internal successors, (39900), 30940 states have internal predecessors, (39900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30941 states to 30941 states and 39900 transitions. [2021-12-15 12:01:58,804 INFO L78 Accepts]: Start accepts. Automaton has 30941 states and 39900 transitions. Word has length 68 [2021-12-15 12:01:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:01:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 30941 states and 39900 transitions. [2021-12-15 12:01:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30941 states and 39900 transitions. [2021-12-15 12:01:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:01:58,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:01:58,807 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:01:58,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:01:58,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:01:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:01:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-15 12:01:58,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:01:58,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392998202] [2021-12-15 12:01:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:01:58,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:01:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:01:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:01:58,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:01:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392998202] [2021-12-15 12:01:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392998202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:01:58,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:01:58,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:01:58,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990160834] [2021-12-15 12:01:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:01:58,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:01:58,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:01:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:01:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:01:58,840 INFO L87 Difference]: Start difference. First operand 30941 states and 39900 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:01:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:01:59,963 INFO L93 Difference]: Finished difference Result 46927 states and 60114 transitions. [2021-12-15 12:01:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:01:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-15 12:01:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:01:59,988 INFO L225 Difference]: With dead ends: 46927 [2021-12-15 12:01:59,989 INFO L226 Difference]: Without dead ends: 20863 [2021-12-15 12:02:00,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:00,005 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:00,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-12-15 12:02:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 20861. [2021-12-15 12:02:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20859 states have (on average 1.2684692458890647) internal successors, (26459), 20860 states have internal predecessors, (26459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 26459 transitions. [2021-12-15 12:02:00,970 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 26459 transitions. Word has length 68 [2021-12-15 12:02:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:00,971 INFO L470 AbstractCegarLoop]: Abstraction has 20861 states and 26459 transitions. [2021-12-15 12:02:00,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 26459 transitions. [2021-12-15 12:02:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:02:00,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:00,974 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:00,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:02:00,974 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-15 12:02:00,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:00,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506204981] [2021-12-15 12:02:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:00,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 12:02:01,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:01,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506204981] [2021-12-15 12:02:01,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506204981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:01,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:01,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:01,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362031253] [2021-12-15 12:02:01,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:01,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:01,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:01,108 INFO L87 Difference]: Start difference. First operand 20861 states and 26459 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:02,110 INFO L93 Difference]: Finished difference Result 36624 states and 46184 transitions. [2021-12-15 12:02:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 12:02:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:02,135 INFO L225 Difference]: With dead ends: 36624 [2021-12-15 12:02:02,135 INFO L226 Difference]: Without dead ends: 17377 [2021-12-15 12:02:02,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:02,160 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:02,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17377 states. [2021-12-15 12:02:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17377 to 17377. [2021-12-15 12:02:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 17375 states have (on average 1.2587625899280575) internal successors, (21871), 17376 states have internal predecessors, (21871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 21871 transitions. [2021-12-15 12:02:03,030 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 21871 transitions. Word has length 68 [2021-12-15 12:02:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:03,030 INFO L470 AbstractCegarLoop]: Abstraction has 17377 states and 21871 transitions. [2021-12-15 12:02:03,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 21871 transitions. [2021-12-15 12:02:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:02:03,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:03,032 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:03,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:02:03,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-15 12:02:03,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190523992] [2021-12-15 12:02:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:03,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 12:02:03,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:03,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190523992] [2021-12-15 12:02:03,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190523992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:03,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:03,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:03,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834853292] [2021-12-15 12:02:03,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:03,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:03,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:03,089 INFO L87 Difference]: Start difference. First operand 17377 states and 21871 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:03,943 INFO L93 Difference]: Finished difference Result 28988 states and 36122 transitions. [2021-12-15 12:02:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 68 [2021-12-15 12:02:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:03,962 INFO L225 Difference]: With dead ends: 28988 [2021-12-15 12:02:03,962 INFO L226 Difference]: Without dead ends: 13257 [2021-12-15 12:02:03,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:03,975 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4558 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:03,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 2955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13257 states. [2021-12-15 12:02:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13257 to 13257. [2021-12-15 12:02:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 13255 states have (on average 1.2516031686156168) internal successors, (16590), 13256 states have internal predecessors, (16590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 16590 transitions. [2021-12-15 12:02:04,689 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 16590 transitions. Word has length 68 [2021-12-15 12:02:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 13257 states and 16590 transitions. [2021-12-15 12:02:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 16590 transitions. [2021-12-15 12:02:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:02:04,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:04,691 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:04,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 12:02:04,692 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-15 12:02:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:04,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526147772] [2021-12-15 12:02:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:04,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 12:02:04,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526147772] [2021-12-15 12:02:04,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526147772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:04,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:04,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518626590] [2021-12-15 12:02:04,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:04,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:04,761 INFO L87 Difference]: Start difference. First operand 13257 states and 16590 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:05,266 INFO L93 Difference]: Finished difference Result 22263 states and 27515 transitions. [2021-12-15 12:02:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:05,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 12:02:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:05,281 INFO L225 Difference]: With dead ends: 22263 [2021-12-15 12:02:05,281 INFO L226 Difference]: Without dead ends: 10573 [2021-12-15 12:02:05,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:05,292 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4563 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4563 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:05,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4563 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10573 states. [2021-12-15 12:02:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10573 to 10573. [2021-12-15 12:02:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10571 states have (on average 1.2554157600983824) internal successors, (13271), 10572 states have internal predecessors, (13271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 13271 transitions. [2021-12-15 12:02:05,929 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 13271 transitions. Word has length 68 [2021-12-15 12:02:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 10573 states and 13271 transitions. [2021-12-15 12:02:05,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 13271 transitions. [2021-12-15 12:02:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 12:02:05,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:05,931 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:02:05,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 12:02:05,931 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-15 12:02:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:05,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936447026] [2021-12-15 12:02:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:05,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:06,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:06,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936447026] [2021-12-15 12:02:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936447026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:02:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245972481] [2021-12-15 12:02:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:06,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:02:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:06,608 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) [2021-12-15 12:02:06,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 12:02:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 12:02:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:02:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:07,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:02:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:08,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245972481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:02:08,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:02:08,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 45 [2021-12-15 12:02:08,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359265632] [2021-12-15 12:02:08,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:02:08,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 12:02:08,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 12:02:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 12:02:08,898 INFO L87 Difference]: Start difference. First operand 10573 states and 13271 transitions. Second operand has 45 states, 45 states have (on average 4.066666666666666) internal successors, (183), 45 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)