./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label57.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem19_label57.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 b997a9e098a2f6fc09702557a2623d5325541f100fcede5aee127c74480bcb96 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:47:47,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:47:47,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:47:47,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:47:47,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:47:47,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:47:47,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:47:47,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:47:47,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:47:47,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:47:47,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:47:47,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:47:47,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:47:47,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:47:47,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:47:47,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:47:47,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:47:47,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:47:47,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:47:47,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:47:47,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:47:47,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:47:47,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:47:47,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:47:47,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:47:47,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:47:47,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:47:47,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:47:47,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:47:47,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:47:47,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:47:47,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:47:47,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:47:47,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:47:47,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:47:47,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:47:47,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:47:47,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:47:47,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:47:47,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:47:47,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:47:47,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:47:47,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:47:47,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:47:47,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:47:47,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:47:47,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:47:47,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:47:47,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:47:47,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:47:47,226 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:47:47,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:47:47,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:47:47,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:47:47,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:47:47,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:47:47,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:47:47,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:47:47,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:47:47,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:47:47,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:47:47,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:47:47,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:47:47,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:47:47,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:47:47,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:47:47,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b997a9e098a2f6fc09702557a2623d5325541f100fcede5aee127c74480bcb96 [2021-12-22 09:47:47,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:47:47,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:47:47,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:47:47,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:47:47,418 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:47:47,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label57.c [2021-12-22 09:47:47,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212decb/c7d4d2c4d1854f88b861bdb6c666e261/FLAG9b9440b7b [2021-12-22 09:47:48,116 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:47:48,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label57.c [2021-12-22 09:47:48,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212decb/c7d4d2c4d1854f88b861bdb6c666e261/FLAG9b9440b7b [2021-12-22 09:47:48,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212decb/c7d4d2c4d1854f88b861bdb6c666e261 [2021-12-22 09:47:48,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:47:48,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:47:48,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:47:48,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:47:48,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:47:48,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:47:48" (1/1) ... [2021-12-22 09:47:48,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493af6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:48, skipping insertion in model container [2021-12-22 09:47:48,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:47:48" (1/1) ... [2021-12-22 09:47:48,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:47:48,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:47:48,885 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/Problem19_label57.c[7333,7346] [2021-12-22 09:47:49,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:47:49,745 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:47:49,773 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/Problem19_label57.c[7333,7346] [2021-12-22 09:47:50,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:47:50,313 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:47:50,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50 WrapperNode [2021-12-22 09:47:50,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:47:50,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:47:50,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:47:50,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:47:50,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:50,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,056 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-22 09:47:51,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:47:51,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:47:51,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:47:51,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:47:51,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:47:51,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:47:51,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:47:51,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:47:51,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (1/1) ... [2021-12-22 09:47:51,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:47:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:47:51,917 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) [2021-12-22 09:47:51,919 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 [2021-12-22 09:47:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:47:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:47:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:47:51,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:47:52,015 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:47:52,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:47:57,417 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:47:57,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:47:57,436 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:47:57,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:47:57 BoogieIcfgContainer [2021-12-22 09:47:57,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:47:57,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:47:57,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:47:57,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:47:57,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:47:48" (1/3) ... [2021-12-22 09:47:57,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b290687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:47:57, skipping insertion in model container [2021-12-22 09:47:57,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:50" (2/3) ... [2021-12-22 09:47:57,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b290687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:47:57, skipping insertion in model container [2021-12-22 09:47:57,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:47:57" (3/3) ... [2021-12-22 09:47:57,446 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label57.c [2021-12-22 09:47:57,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:47:57,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:47:57,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:47:57,502 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 [2021-12-22 09:47:57,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:47:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 09:47:57,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:57,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:57,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2021-12-22 09:47:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:57,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692287731] [2021-12-22 09:47:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:57,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:57,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692287731] [2021-12-22 09:47:57,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692287731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:57,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:47:57,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:47:57,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058246692] [2021-12-22 09:47:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:57,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:57,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:47:57,810 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:03,689 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-22 09:48:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:48:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-22 09:48:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:03,735 INFO L225 Difference]: With dead ends: 4957 [2021-12-22 09:48:03,736 INFO L226 Difference]: Without dead ends: 3129 [2021-12-22 09:48:03,742 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 [2021-12-22 09:48:03,744 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1570 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:03,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-22 09:48:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-22 09:48:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-22 09:48:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-22 09:48:03,853 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 56 [2021-12-22 09:48:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:03,855 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-22 09:48:03,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-22 09:48:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 09:48:03,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:03,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:03,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:48:03,863 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash 839123000, now seen corresponding path program 1 times [2021-12-22 09:48:03,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:03,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754366894] [2021-12-22 09:48:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:03,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:48:04,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754366894] [2021-12-22 09:48:04,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754366894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:04,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:48:04,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:48:04,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920750729] [2021-12-22 09:48:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:04,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:48:04,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:48:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:48:04,006 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:12,350 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2021-12-22 09:48:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:48:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-22 09:48:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:12,369 INFO L225 Difference]: With dead ends: 10359 [2021-12-22 09:48:12,369 INFO L226 Difference]: Without dead ends: 7253 [2021-12-22 09:48:12,376 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 [2021-12-22 09:48:12,377 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 4321 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:12,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 1292 Invalid, 11004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-12-22 09:48:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2021-12-22 09:48:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2021-12-22 09:48:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2021-12-22 09:48:12,485 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 123 [2021-12-22 09:48:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:12,487 INFO L470 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2021-12-22 09:48:12,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2021-12-22 09:48:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-22 09:48:12,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:12,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:12,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:48:12,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1842500793, now seen corresponding path program 1 times [2021-12-22 09:48:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:12,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658504159] [2021-12-22 09:48:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:12,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 09:48:12,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658504159] [2021-12-22 09:48:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658504159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:12,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:48:12,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:48:12,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163450544] [2021-12-22 09:48:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:48:12,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:48:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:48:12,752 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:20,709 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2021-12-22 09:48:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:48:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 330 [2021-12-22 09:48:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:20,738 INFO L225 Difference]: With dead ends: 17269 [2021-12-22 09:48:20,738 INFO L226 Difference]: Without dead ends: 11387 [2021-12-22 09:48:20,748 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 [2021-12-22 09:48:20,749 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:20,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2157 Invalid, 9886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-22 09:48:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2021-12-22 09:48:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2021-12-22 09:48:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2021-12-22 09:48:20,967 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 330 [2021-12-22 09:48:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:20,968 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2021-12-22 09:48:20,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2021-12-22 09:48:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-22 09:48:20,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:20,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:48:20,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -863817825, now seen corresponding path program 1 times [2021-12-22 09:48:20,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167118410] [2021-12-22 09:48:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:20,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 09:48:21,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167118410] [2021-12-22 09:48:21,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167118410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:21,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:48:21,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:48:21,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778243027] [2021-12-22 09:48:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:21,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:48:21,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:48:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:48:21,125 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:26,894 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2021-12-22 09:48:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:48:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-12-22 09:48:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:26,916 INFO L225 Difference]: With dead ends: 20033 [2021-12-22 09:48:26,916 INFO L226 Difference]: Without dead ends: 11367 [2021-12-22 09:48:26,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:48:26,927 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:26,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-22 09:48:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2021-12-22 09:48:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2021-12-22 09:48:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2021-12-22 09:48:27,063 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 358 [2021-12-22 09:48:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:27,063 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2021-12-22 09:48:27,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2021-12-22 09:48:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-12-22 09:48:27,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:27,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:27,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:48:27,073 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -588179740, now seen corresponding path program 1 times [2021-12-22 09:48:27,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:27,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567252641] [2021-12-22 09:48:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:27,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:48:27,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:27,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567252641] [2021-12-22 09:48:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567252641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:27,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:48:27,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:48:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032324084] [2021-12-22 09:48:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:27,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:48:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:48:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:48:27,282 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:32,267 INFO L93 Difference]: Finished difference Result 25557 states and 36131 transitions. [2021-12-22 09:48:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:48:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 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 543 [2021-12-22 09:48:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:32,291 INFO L225 Difference]: With dead ends: 25557 [2021-12-22 09:48:32,291 INFO L226 Difference]: Without dead ends: 16922 [2021-12-22 09:48:32,299 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 [2021-12-22 09:48:32,300 INFO L933 BasicCegarLoop]: 2759 mSDtfsCounter, 1465 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4068 mSolverCounterSat, 1816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 5884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1816 IncrementalHoareTripleChecker+Valid, 4068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2936 Invalid, 5884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1816 Valid, 4068 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 09:48:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16922 states. [2021-12-22 09:48:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16922 to 16876. [2021-12-22 09:48:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 1.2959407407407408) internal successors, (21869), 16875 states have internal predecessors, (21869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 21869 transitions. [2021-12-22 09:48:32,459 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 21869 transitions. Word has length 543 [2021-12-22 09:48:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:32,460 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 21869 transitions. [2021-12-22 09:48:32,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 21869 transitions. [2021-12-22 09:48:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2021-12-22 09:48:32,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:32,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:32,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:48:32,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1265174184, now seen corresponding path program 1 times [2021-12-22 09:48:32,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:32,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682975920] [2021-12-22 09:48:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:32,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 129 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:48:32,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682975920] [2021-12-22 09:48:32,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682975920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:48:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003748802] [2021-12-22 09:48:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:32,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:48:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:48:32,711 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) [2021-12-22 09:48:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:48:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:48:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:48:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:48:33,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:48:33,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003748802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:33,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:48:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:48:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950001567] [2021-12-22 09:48:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:33,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:48:33,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:48:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:48:33,666 INFO L87 Difference]: Start difference. First operand 16876 states and 21869 transitions. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:38,674 INFO L93 Difference]: Finished difference Result 43303 states and 57896 transitions. [2021-12-22 09:48:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:48:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 612 [2021-12-22 09:48:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:38,713 INFO L225 Difference]: With dead ends: 43303 [2021-12-22 09:48:38,714 INFO L226 Difference]: Without dead ends: 29159 [2021-12-22 09:48:38,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:48:38,728 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 2533 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 5526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:38,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2533 Valid, 816 Invalid, 5526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 09:48:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29159 states. [2021-12-22 09:48:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29159 to 29155. [2021-12-22 09:48:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29155 states, 29154 states have (on average 1.297592097139329) internal successors, (37830), 29154 states have internal predecessors, (37830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29155 states to 29155 states and 37830 transitions. [2021-12-22 09:48:39,021 INFO L78 Accepts]: Start accepts. Automaton has 29155 states and 37830 transitions. Word has length 612 [2021-12-22 09:48:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:39,021 INFO L470 AbstractCegarLoop]: Abstraction has 29155 states and 37830 transitions. [2021-12-22 09:48:39,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29155 states and 37830 transitions. [2021-12-22 09:48:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2021-12-22 09:48:39,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:39,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:39,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 09:48:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 09:48:39,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash -309330290, now seen corresponding path program 1 times [2021-12-22 09:48:39,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:39,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982247782] [2021-12-22 09:48:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:39,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-22 09:48:39,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982247782] [2021-12-22 09:48:39,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982247782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:48:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665696546] [2021-12-22 09:48:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:39,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:48:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:48:39,533 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) [2021-12-22 09:48:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:48:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:48:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:48:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:48:40,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:48:40,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665696546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:40,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:48:40,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:48:40,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059279500] [2021-12-22 09:48:40,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:40,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:48:40,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:40,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:48:40,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:48:40,481 INFO L87 Difference]: Start difference. First operand 29155 states and 37830 transitions. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:48:45,703 INFO L93 Difference]: Finished difference Result 77415 states and 102356 transitions. [2021-12-22 09:48:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:48:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 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 665 [2021-12-22 09:48:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:48:45,765 INFO L225 Difference]: With dead ends: 77415 [2021-12-22 09:48:45,765 INFO L226 Difference]: Without dead ends: 50992 [2021-12-22 09:48:45,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:48:45,789 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1544 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3903 mSolverCounterSat, 1728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 5631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1728 IncrementalHoareTripleChecker+Valid, 3903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:48:45,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 1676 Invalid, 5631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1728 Valid, 3903 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-22 09:48:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50992 states. [2021-12-22 09:48:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50992 to 46896. [2021-12-22 09:48:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46896 states, 46895 states have (on average 1.2159505277748162) internal successors, (57022), 46895 states have internal predecessors, (57022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46896 states to 46896 states and 57022 transitions. [2021-12-22 09:48:46,203 INFO L78 Accepts]: Start accepts. Automaton has 46896 states and 57022 transitions. Word has length 665 [2021-12-22 09:48:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:48:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 46896 states and 57022 transitions. [2021-12-22 09:48:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:48:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46896 states and 57022 transitions. [2021-12-22 09:48:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2021-12-22 09:48:46,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:48:46,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:48:46,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:48:46,423 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,SelfDestructingSolverStorable6 [2021-12-22 09:48:46,423 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:48:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:48:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1928337988, now seen corresponding path program 1 times [2021-12-22 09:48:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:48:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004708821] [2021-12-22 09:48:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:48:46,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:48:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:48:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-22 09:48:46,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:48:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004708821] [2021-12-22 09:48:46,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004708821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:48:46,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:48:46,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:48:46,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831402254] [2021-12-22 09:48:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:48:46,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:48:46,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:48:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:48:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:48:46,626 INFO L87 Difference]: Start difference. First operand 46896 states and 57022 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)