./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label30.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label30.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 74ad95c89e825af3e8bd664b54190b589939097fe089144b4a47194abf94e882 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:59:01,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:59:01,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:59:01,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:59:01,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:59:01,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:59:01,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:59:01,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:59:01,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:59:01,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:59:01,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:59:01,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:59:01,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:59:01,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:59:01,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:59:01,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:59:01,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:59:01,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:59:01,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:59:01,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:59:01,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:59:01,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:59:01,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:59:01,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:59:01,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:59:01,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:59:01,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:59:01,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:59:01,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:59:01,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:59:01,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:59:01,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:59:01,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:59:01,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:59:01,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:59:01,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:59:01,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:59:01,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:59:01,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:59:01,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:59:01,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:59:01,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:59:01,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:59:01,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:59:01,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:59:01,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:59:01,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:59:01,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:59:01,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:59:01,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:59:01,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:59:01,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:59:01,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:59:01,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:59:01,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:59:01,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:59:01,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:59:01,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:59:01,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:59:01,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:59:01,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:59:01,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:59:01,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:59:01,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:59:01,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:59:01,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:59:01,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74ad95c89e825af3e8bd664b54190b589939097fe089144b4a47194abf94e882 [2021-12-15 09:59:01,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:59:01,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:59:01,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:59:01,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:59:01,489 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:59:01,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label30.c [2021-12-15 09:59:01,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eba27778/07d48b08f7dd4786981f60ccb499aa29/FLAGa8668c337 [2021-12-15 09:59:02,102 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:59:02,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label30.c [2021-12-15 09:59:02,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eba27778/07d48b08f7dd4786981f60ccb499aa29/FLAGa8668c337 [2021-12-15 09:59:02,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eba27778/07d48b08f7dd4786981f60ccb499aa29 [2021-12-15 09:59:02,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:59:02,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:59:02,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:59:02,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:59:02,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:59:02,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:02" (1/1) ... [2021-12-15 09:59:02,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d96b65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:02, skipping insertion in model container [2021-12-15 09:59:02,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:02" (1/1) ... [2021-12-15 09:59:02,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:59:02,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:59:02,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label30.c[3774,3787] [2021-12-15 09:59:03,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:59:03,285 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:59:03,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label30.c[3774,3787] [2021-12-15 09:59:03,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:59:03,508 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:59:03,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03 WrapperNode [2021-12-15 09:59:03,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:59:03,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:59:03,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:59:03,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:59:03,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,766 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 09:59:03,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:59:03,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:59:03,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:59:03,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:59:03,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:03,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:04,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:04,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:59:04,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:59:04,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:59:04,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:59:04,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (1/1) ... [2021-12-15 09:59:04,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:59:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:04,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:59:04,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:59:04,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:59:04,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:59:04,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:59:04,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:59:04,233 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:59:04,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:59:06,647 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:59:06,655 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:59:06,655 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:59:06,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:06 BoogieIcfgContainer [2021-12-15 09:59:06,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:59:06,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:59:06,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:59:06,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:59:06,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:59:02" (1/3) ... [2021-12-15 09:59:06,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464f28c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:06, skipping insertion in model container [2021-12-15 09:59:06,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:03" (2/3) ... [2021-12-15 09:59:06,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464f28c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:06, skipping insertion in model container [2021-12-15 09:59:06,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:06" (3/3) ... [2021-12-15 09:59:06,664 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label30.c [2021-12-15 09:59:06,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:59:06,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:59:06,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:59:06,724 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:59:06,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:59:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 09:59:06,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:06,758 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] [2021-12-15 09:59:06,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-15 09:59:06,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:06,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545066307] [2021-12-15 09:59:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:06,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:06,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:06,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545066307] [2021-12-15 09:59:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545066307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:06,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:06,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:06,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133369801] [2021-12-15 09:59:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:06,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:06,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:06,981 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:09,272 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-15 09:59:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-15 09:59:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:09,293 INFO L225 Difference]: With dead ends: 1642 [2021-12-15 09:59:09,294 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 09:59:09,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:09,301 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 466 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:09,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:59:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 09:59:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-15 09:59:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-15 09:59:09,372 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 24 [2021-12-15 09:59:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:09,373 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-15 09:59:09,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-15 09:59:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 09:59:09,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:09,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:09,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:59:09,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1222847970, now seen corresponding path program 1 times [2021-12-15 09:59:09,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:09,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895847286] [2021-12-15 09:59:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:09,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:09,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:09,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895847286] [2021-12-15 09:59:09,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895847286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:09,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:09,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:09,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859881158] [2021-12-15 09:59:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:09,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:09,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:09,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:09,503 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:11,460 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-15 09:59:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-15 09:59:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:11,482 INFO L225 Difference]: With dead ends: 2814 [2021-12-15 09:59:11,482 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 09:59:11,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:11,488 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 467 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:11,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:59:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 09:59:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-15 09:59:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-15 09:59:11,539 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 94 [2021-12-15 09:59:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-15 09:59:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-15 09:59:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 09:59:11,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:11,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:11,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:59:11,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1184847617, now seen corresponding path program 1 times [2021-12-15 09:59:11,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:11,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409574636] [2021-12-15 09:59:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:11,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:11,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409574636] [2021-12-15 09:59:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409574636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:11,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:11,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:11,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438616449] [2021-12-15 09:59:11,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:11,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:11,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:11,664 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:13,847 INFO L93 Difference]: Finished difference Result 5445 states and 7408 transitions. [2021-12-15 09:59:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-15 09:59:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:13,861 INFO L225 Difference]: With dead ends: 5445 [2021-12-15 09:59:13,861 INFO L226 Difference]: Without dead ends: 3605 [2021-12-15 09:59:13,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:13,866 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 440 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 273 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:59:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-12-15 09:59:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 3583. [2021-12-15 09:59:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-15 09:59:13,940 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 116 [2021-12-15 09:59:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:13,941 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-15 09:59:13,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-15 09:59:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 09:59:13,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:13,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:13,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:59:13,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1536800260, now seen corresponding path program 1 times [2021-12-15 09:59:13,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:13,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826469906] [2021-12-15 09:59:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:13,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:14,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826469906] [2021-12-15 09:59:14,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826469906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:14,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:14,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172291169] [2021-12-15 09:59:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:14,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:14,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:14,128 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:16,485 INFO L93 Difference]: Finished difference Result 8893 states and 11846 transitions. [2021-12-15 09:59:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-12-15 09:59:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:16,498 INFO L225 Difference]: With dead ends: 8893 [2021-12-15 09:59:16,498 INFO L226 Difference]: Without dead ends: 5312 [2021-12-15 09:59:16,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:16,501 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:16,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:59:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-15 09:59:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5292. [2021-12-15 09:59:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 5291 states have (on average 1.2797202797202798) internal successors, (6771), 5291 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 6771 transitions. [2021-12-15 09:59:16,557 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 6771 transitions. Word has length 129 [2021-12-15 09:59:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:16,557 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 6771 transitions. [2021-12-15 09:59:16,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 6771 transitions. [2021-12-15 09:59:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 09:59:16,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:16,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:16,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:59:16,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash -54792235, now seen corresponding path program 1 times [2021-12-15 09:59:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:16,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739446796] [2021-12-15 09:59:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:16,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:16,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:16,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739446796] [2021-12-15 09:59:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739446796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:16,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:16,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:16,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931306004] [2021-12-15 09:59:16,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:16,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:16,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:59:16,645 INFO L87 Difference]: Start difference. First operand 5292 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:18,365 INFO L93 Difference]: Finished difference Result 9327 states and 12044 transitions. [2021-12-15 09:59:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:59:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-15 09:59:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:18,380 INFO L225 Difference]: With dead ends: 9327 [2021-12-15 09:59:18,381 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 09:59:18,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:59:18,389 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:18,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:59:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 09:59:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 09:59:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-15 09:59:18,443 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 135 [2021-12-15 09:59:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:18,444 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-15 09:59:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-15 09:59:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 09:59:18,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:18,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:18,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:59:18,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash 681815385, now seen corresponding path program 1 times [2021-12-15 09:59:18,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:18,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251411774] [2021-12-15 09:59:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:18,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 09:59:18,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251411774] [2021-12-15 09:59:18,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251411774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:18,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:18,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:18,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057885283] [2021-12-15 09:59:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:18,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:18,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:18,538 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:20,273 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-15 09:59:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 163 [2021-12-15 09:59:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:20,286 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 09:59:20,286 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 09:59:20,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:20,292 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:20,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:59:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 09:59:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4427. [2021-12-15 09:59:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.208992318120199) internal successors, (5351), 4426 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 5351 transitions. [2021-12-15 09:59:20,340 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 5351 transitions. Word has length 163 [2021-12-15 09:59:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 5351 transitions. [2021-12-15 09:59:20,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 5351 transitions. [2021-12-15 09:59:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 09:59:20,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:20,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:20,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:59:20,342 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash -826128363, now seen corresponding path program 1 times [2021-12-15 09:59:20,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:20,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359423329] [2021-12-15 09:59:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:20,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:20,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359423329] [2021-12-15 09:59:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359423329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:20,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599392434] [2021-12-15 09:59:20,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:20,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:20,391 INFO L87 Difference]: Start difference. First operand 4427 states and 5351 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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 09:59:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:21,726 INFO L93 Difference]: Finished difference Result 11399 states and 13997 transitions. [2021-12-15 09:59:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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 176 [2021-12-15 09:59:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:21,744 INFO L225 Difference]: With dead ends: 11399 [2021-12-15 09:59:21,744 INFO L226 Difference]: Without dead ends: 6974 [2021-12-15 09:59:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:21,750 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:21,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:59:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2021-12-15 09:59:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6974. [2021-12-15 09:59:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6973 states have (on average 1.1834217696830633) internal successors, (8252), 6973 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 8252 transitions. [2021-12-15 09:59:21,860 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 8252 transitions. Word has length 176 [2021-12-15 09:59:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:21,860 INFO L470 AbstractCegarLoop]: Abstraction has 6974 states and 8252 transitions. [2021-12-15 09:59:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 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 09:59:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 8252 transitions. [2021-12-15 09:59:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-15 09:59:21,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:21,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:21,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:59:21,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 435614096, now seen corresponding path program 1 times [2021-12-15 09:59:21,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207454141] [2021-12-15 09:59:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:21,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:59:21,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207454141] [2021-12-15 09:59:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207454141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:21,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:21,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:21,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587423629] [2021-12-15 09:59:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:21,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:21,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:21,920 INFO L87 Difference]: Start difference. First operand 6974 states and 8252 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:23,440 INFO L93 Difference]: Finished difference Result 16914 states and 20159 transitions. [2021-12-15 09:59:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 178 [2021-12-15 09:59:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:23,455 INFO L225 Difference]: With dead ends: 16914 [2021-12-15 09:59:23,456 INFO L226 Difference]: Without dead ends: 9941 [2021-12-15 09:59:23,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:23,464 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 427 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:23,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:59:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-12-15 09:59:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 7373. [2021-12-15 09:59:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7373 states, 7372 states have (on average 1.1795984807379274) internal successors, (8696), 7372 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7373 states to 7373 states and 8696 transitions. [2021-12-15 09:59:23,560 INFO L78 Accepts]: Start accepts. Automaton has 7373 states and 8696 transitions. Word has length 178 [2021-12-15 09:59:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:23,560 INFO L470 AbstractCegarLoop]: Abstraction has 7373 states and 8696 transitions. [2021-12-15 09:59:23,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7373 states and 8696 transitions. [2021-12-15 09:59:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-15 09:59:23,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:23,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:23,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:59:23,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1285587882, now seen corresponding path program 1 times [2021-12-15 09:59:23,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907475929] [2021-12-15 09:59:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:23,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907475929] [2021-12-15 09:59:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907475929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272378990] [2021-12-15 09:59:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:23,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:23,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:59:23,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:59:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:59:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:59:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:24,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:59:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:24,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272378990] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:24,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:59:24,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-12-15 09:59:24,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740072709] [2021-12-15 09:59:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:24,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:24,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:59:24,750 INFO L87 Difference]: Start difference. First operand 7373 states and 8696 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:27,311 INFO L93 Difference]: Finished difference Result 23711 states and 27966 transitions. [2021-12-15 09:59:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:59:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-15 09:59:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:27,343 INFO L225 Difference]: With dead ends: 23711 [2021-12-15 09:59:27,343 INFO L226 Difference]: Without dead ends: 16340 [2021-12-15 09:59:27,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:59:27,355 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 810 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:27,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 164 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:59:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16340 states. [2021-12-15 09:59:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16340 to 16337. [2021-12-15 09:59:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16337 states, 16336 states have (on average 1.1649730656219393) internal successors, (19031), 16336 states have internal predecessors, (19031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16337 states to 16337 states and 19031 transitions. [2021-12-15 09:59:27,593 INFO L78 Accepts]: Start accepts. Automaton has 16337 states and 19031 transitions. Word has length 244 [2021-12-15 09:59:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 16337 states and 19031 transitions. [2021-12-15 09:59:27,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16337 states and 19031 transitions. [2021-12-15 09:59:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-15 09:59:27,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:27,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:27,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:59:27,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:27,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1536887373, now seen corresponding path program 1 times [2021-12-15 09:59:27,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:27,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403463961] [2021-12-15 09:59:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:27,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-15 09:59:27,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403463961] [2021-12-15 09:59:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403463961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:27,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:27,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:27,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731392537] [2021-12-15 09:59:27,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:27,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:27,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:27,880 INFO L87 Difference]: Start difference. First operand 16337 states and 19031 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:29,493 INFO L93 Difference]: Finished difference Result 36073 states and 42175 transitions. [2021-12-15 09:59:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-12-15 09:59:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:29,525 INFO L225 Difference]: With dead ends: 36073 [2021-12-15 09:59:29,526 INFO L226 Difference]: Without dead ends: 19313 [2021-12-15 09:59:29,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:29,541 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:29,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 842 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:59:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19313 states. [2021-12-15 09:59:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19313 to 19313. [2021-12-15 09:59:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19313 states, 19312 states have (on average 1.144003728251864) internal successors, (22093), 19312 states have internal predecessors, (22093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19313 states to 19313 states and 22093 transitions. [2021-12-15 09:59:29,789 INFO L78 Accepts]: Start accepts. Automaton has 19313 states and 22093 transitions. Word has length 256 [2021-12-15 09:59:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:29,789 INFO L470 AbstractCegarLoop]: Abstraction has 19313 states and 22093 transitions. [2021-12-15 09:59:29,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19313 states and 22093 transitions. [2021-12-15 09:59:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-15 09:59:29,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:29,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:29,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:59:29,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash 58627350, now seen corresponding path program 1 times [2021-12-15 09:59:29,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404982699] [2021-12-15 09:59:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:59:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404982699] [2021-12-15 09:59:29,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404982699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:29,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:29,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:29,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355656997] [2021-12-15 09:59:29,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:29,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:29,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:29,942 INFO L87 Difference]: Start difference. First operand 19313 states and 22093 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:31,559 INFO L93 Difference]: Finished difference Result 42454 states and 48690 transitions. [2021-12-15 09:59:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2021-12-15 09:59:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:31,590 INFO L225 Difference]: With dead ends: 42454 [2021-12-15 09:59:31,591 INFO L226 Difference]: Without dead ends: 22709 [2021-12-15 09:59:31,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:31,607 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 466 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 359 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:59:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22709 states. [2021-12-15 09:59:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22709 to 21854. [2021-12-15 09:59:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21854 states, 21853 states have (on average 1.1356335514574658) internal successors, (24817), 21853 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21854 states to 21854 states and 24817 transitions. [2021-12-15 09:59:31,820 INFO L78 Accepts]: Start accepts. Automaton has 21854 states and 24817 transitions. Word has length 296 [2021-12-15 09:59:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:31,821 INFO L470 AbstractCegarLoop]: Abstraction has 21854 states and 24817 transitions. [2021-12-15 09:59:31,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 21854 states and 24817 transitions. [2021-12-15 09:59:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-15 09:59:31,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:31,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:31,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:59:31,826 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash 7470132, now seen corresponding path program 1 times [2021-12-15 09:59:31,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896769084] [2021-12-15 09:59:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:31,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:59:31,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:31,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896769084] [2021-12-15 09:59:31,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896769084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:31,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:31,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:31,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712760745] [2021-12-15 09:59:31,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:31,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:31,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:31,972 INFO L87 Difference]: Start difference. First operand 21854 states and 24817 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:33,710 INFO L93 Difference]: Finished difference Result 52660 states and 59608 transitions. [2021-12-15 09:59:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:33,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 318 [2021-12-15 09:59:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:33,745 INFO L225 Difference]: With dead ends: 52660 [2021-12-15 09:59:33,745 INFO L226 Difference]: Without dead ends: 30808 [2021-12-15 09:59:33,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:33,762 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 322 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:33,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 825 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:59:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30808 states. [2021-12-15 09:59:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30808 to 29090. [2021-12-15 09:59:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29090 states, 29089 states have (on average 1.1231393310185982) internal successors, (32671), 29089 states have internal predecessors, (32671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29090 states to 29090 states and 32671 transitions. [2021-12-15 09:59:34,174 INFO L78 Accepts]: Start accepts. Automaton has 29090 states and 32671 transitions. Word has length 318 [2021-12-15 09:59:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:34,175 INFO L470 AbstractCegarLoop]: Abstraction has 29090 states and 32671 transitions. [2021-12-15 09:59:34,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 29090 states and 32671 transitions. [2021-12-15 09:59:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-15 09:59:34,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:34,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:34,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:59:34,180 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -3496516, now seen corresponding path program 1 times [2021-12-15 09:59:34,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191629380] [2021-12-15 09:59:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:34,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 204 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:34,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191629380] [2021-12-15 09:59:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191629380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20441682] [2021-12-15 09:59:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:34,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:34,276 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 09:59:34,277 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 09:59:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:59:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:59:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 204 proven. 78 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:35,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:59:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20441682] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:35,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:59:35,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 09:59:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68063893] [2021-12-15 09:59:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:35,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:59:35,640 INFO L87 Difference]: Start difference. First operand 29090 states and 32671 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:38,376 INFO L93 Difference]: Finished difference Result 69692 states and 78483 transitions. [2021-12-15 09:59:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:59:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-12-15 09:59:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:38,419 INFO L225 Difference]: With dead ends: 69692 [2021-12-15 09:59:38,420 INFO L226 Difference]: Without dead ends: 40176 [2021-12-15 09:59:38,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 641 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:59:38,439 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 846 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:38,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 188 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:59:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40176 states. [2021-12-15 09:59:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40176 to 38048. [2021-12-15 09:59:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38048 states, 38047 states have (on average 1.1306279075879833) internal successors, (43017), 38047 states have internal predecessors, (43017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38048 states to 38048 states and 43017 transitions. [2021-12-15 09:59:38,961 INFO L78 Accepts]: Start accepts. Automaton has 38048 states and 43017 transitions. Word has length 323 [2021-12-15 09:59:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:38,962 INFO L470 AbstractCegarLoop]: Abstraction has 38048 states and 43017 transitions. [2021-12-15 09:59:38,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 38048 states and 43017 transitions. [2021-12-15 09:59:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 09:59:38,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:38,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:38,984 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 09:59:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 09:59:39,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1056105917, now seen corresponding path program 1 times [2021-12-15 09:59:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077613140] [2021-12-15 09:59:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:39,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 230 proven. 82 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:39,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:39,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077613140] [2021-12-15 09:59:39,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077613140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:39,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792035596] [2021-12-15 09:59:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:39,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:39,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:39,355 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 09:59:39,356 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 09:59:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:39,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:59:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:59:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 230 proven. 82 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:40,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:59:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 230 proven. 82 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 09:59:41,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792035596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:59:41,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:59:41,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-15 09:59:41,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266949061] [2021-12-15 09:59:41,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:59:41,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 09:59:41,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 09:59:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:59:41,304 INFO L87 Difference]: Start difference. First operand 38048 states and 43017 transitions. Second operand has 10 states, 10 states have (on average 69.3) internal successors, (693), 9 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:50,554 INFO L93 Difference]: Finished difference Result 108118 states and 121892 transitions. [2021-12-15 09:59:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 09:59:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 69.3) internal successors, (693), 9 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 336 [2021-12-15 09:59:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:50,637 INFO L225 Difference]: With dead ends: 108118 [2021-12-15 09:59:50,637 INFO L226 Difference]: Without dead ends: 67947 [2021-12-15 09:59:50,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-12-15 09:59:50,659 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 7078 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 10376 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7078 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 11574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 10376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:50,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7078 Valid, 579 Invalid, 11574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 10376 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-12-15 09:59:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-12-15 09:59:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 65339. [2021-12-15 09:59:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65339 states, 65338 states have (on average 1.1197006336282103) internal successors, (73159), 65338 states have internal predecessors, (73159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65339 states to 65339 states and 73159 transitions. [2021-12-15 09:59:51,495 INFO L78 Accepts]: Start accepts. Automaton has 65339 states and 73159 transitions. Word has length 336 [2021-12-15 09:59:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:51,495 INFO L470 AbstractCegarLoop]: Abstraction has 65339 states and 73159 transitions. [2021-12-15 09:59:51,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.3) internal successors, (693), 9 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 65339 states and 73159 transitions. [2021-12-15 09:59:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-15 09:59:51,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:51,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:51,519 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 09:59:51,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:51,716 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1254164931, now seen corresponding path program 1 times [2021-12-15 09:59:51,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716653152] [2021-12-15 09:59:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:51,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:59:52,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716653152] [2021-12-15 09:59:52,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716653152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:52,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:52,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048679392] [2021-12-15 09:59:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:52,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:52,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:52,004 INFO L87 Difference]: Start difference. First operand 65339 states and 73159 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:53,931 INFO L93 Difference]: Finished difference Result 149882 states and 168561 transitions. [2021-12-15 09:59:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 379 [2021-12-15 09:59:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:54,033 INFO L225 Difference]: With dead ends: 149882 [2021-12-15 09:59:54,033 INFO L226 Difference]: Without dead ends: 84541 [2021-12-15 09:59:54,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:54,074 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 370 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:54,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 278 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:59:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84541 states. [2021-12-15 09:59:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84541 to 82374. [2021-12-15 09:59:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82374 states, 82373 states have (on average 1.1182183482451775) internal successors, (92111), 82373 states have internal predecessors, (92111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82374 states to 82374 states and 92111 transitions. [2021-12-15 09:59:55,320 INFO L78 Accepts]: Start accepts. Automaton has 82374 states and 92111 transitions. Word has length 379 [2021-12-15 09:59:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:55,320 INFO L470 AbstractCegarLoop]: Abstraction has 82374 states and 92111 transitions. [2021-12-15 09:59:55,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 82374 states and 92111 transitions. [2021-12-15 09:59:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-12-15 09:59:55,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:55,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:55,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:59:55,326 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 982255671, now seen corresponding path program 1 times [2021-12-15 09:59:55,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:55,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352782752] [2021-12-15 09:59:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:55,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-15 09:59:55,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:55,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352782752] [2021-12-15 09:59:55,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352782752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:55,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:55,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:55,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137665617] [2021-12-15 09:59:55,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:55,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:55,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:55,418 INFO L87 Difference]: Start difference. First operand 82374 states and 92111 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:57,450 INFO L93 Difference]: Finished difference Result 189002 states and 211109 transitions. [2021-12-15 09:59:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:57,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-12-15 09:59:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:57,574 INFO L225 Difference]: With dead ends: 189002 [2021-12-15 09:59:57,574 INFO L226 Difference]: Without dead ends: 100222 [2021-12-15 09:59:57,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:57,624 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 447 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:57,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 599 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:59:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100222 states. [2021-12-15 09:59:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100222 to 94255. [2021-12-15 09:59:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94255 states, 94254 states have (on average 1.1039743671356124) internal successors, (104054), 94254 states have internal predecessors, (104054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94255 states to 94255 states and 104054 transitions. [2021-12-15 09:59:59,087 INFO L78 Accepts]: Start accepts. Automaton has 94255 states and 104054 transitions. Word has length 424 [2021-12-15 09:59:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:59,087 INFO L470 AbstractCegarLoop]: Abstraction has 94255 states and 104054 transitions. [2021-12-15 09:59:59,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 94255 states and 104054 transitions. [2021-12-15 09:59:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-15 09:59:59,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:59,094 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:59,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:59:59,094 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1517678580, now seen corresponding path program 1 times [2021-12-15 09:59:59,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:59,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003401472] [2021-12-15 09:59:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:59,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 09:59:59,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:59,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003401472] [2021-12-15 09:59:59,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003401472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:59,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:59,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:59,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097349359] [2021-12-15 09:59:59,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:59,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:59,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:59,199 INFO L87 Difference]: Start difference. First operand 94255 states and 104054 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 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 10:00:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:01,370 INFO L93 Difference]: Finished difference Result 213215 states and 235512 transitions. [2021-12-15 10:00:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:00:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 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 471 [2021-12-15 10:00:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted.