./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_label01.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 a4e6e263a6fe01660f2ecabfa1a654296517a773a2b8a9b458da8809aa3aafd8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:59:00,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:59:00,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:59:00,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:59:00,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:59:00,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:59:00,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:59:00,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:59:00,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:59:00,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:59:00,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:59:00,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:59:00,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:59:00,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:59:00,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:59:00,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:59:00,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:59:00,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:59:00,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:59:00,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:59:00,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:59:00,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:59:00,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:59:00,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:59:00,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:59:00,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:59:00,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:59:00,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:59:00,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:59:00,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:59:00,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:59:00,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:59:00,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:59:00,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:59:00,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:59:00,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:59:00,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:59:00,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:59:00,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:59:00,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:59:00,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:59:00,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:59:00,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:59:00,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:59:00,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:59:00,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:59:00,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:59:00,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:59:00,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:59:00,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:59:00,347 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:59:00,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:59:00,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:59:00,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:59:00,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:59:00,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:59:00,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:59:00,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:59:00,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:59:00,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:59:00,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:59:00,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:59:00,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:59:00,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:59:00,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:59:00,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:59:00,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:00,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:59:00,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:59:00,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:59:00,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:59:00,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:59:00,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:59:00,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:59:00,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:59:00,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:59:00,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e6e263a6fe01660f2ecabfa1a654296517a773a2b8a9b458da8809aa3aafd8 [2021-12-15 22:59:00,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:59:00,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:59:00,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:59:00,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:59:00,617 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:59:00,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label01.c [2021-12-15 22:59:00,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4660ad/1657077f53224f2daa1eecee72161aa7/FLAG4809634dd [2021-12-15 22:59:01,232 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:59:01,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label01.c [2021-12-15 22:59:01,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4660ad/1657077f53224f2daa1eecee72161aa7/FLAG4809634dd [2021-12-15 22:59:01,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4660ad/1657077f53224f2daa1eecee72161aa7 [2021-12-15 22:59:01,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:59:01,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:59:01,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:01,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:59:01,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:59:01,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:01" (1/1) ... [2021-12-15 22:59:01,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3611d833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:01, skipping insertion in model container [2021-12-15 22:59:01,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:01" (1/1) ... [2021-12-15 22:59:01,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:59:01,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:59:01,810 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_label01.c[6877,6890] [2021-12-15 22:59:02,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:02,243 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:59:02,274 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_label01.c[6877,6890] [2021-12-15 22:59:02,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:02,657 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:59:02,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02 WrapperNode [2021-12-15 22:59:02,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:02,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:02,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:59:02,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:59:02,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:02,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:02,941 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 22:59:02,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:02,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:59:02,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:59:02,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:59:02,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:02,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:59:03,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:59:03,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:59:03,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:59:03,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (1/1) ... [2021-12-15 22:59:03,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:03,424 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 22:59:03,445 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 22:59:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:59:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:59:03,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:59:03,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:59:03,527 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:59:03,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:59:06,183 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:59:06,199 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:59:06,200 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:59:06,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:06 BoogieIcfgContainer [2021-12-15 22:59:06,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:59:06,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:59:06,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:59:06,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:59:06,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:59:01" (1/3) ... [2021-12-15 22:59:06,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f1211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:06, skipping insertion in model container [2021-12-15 22:59:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:02" (2/3) ... [2021-12-15 22:59:06,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f1211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:06, skipping insertion in model container [2021-12-15 22:59:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:06" (3/3) ... [2021-12-15 22:59:06,209 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label01.c [2021-12-15 22:59:06,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:59:06,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:59:06,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:59:06,273 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 22:59:06,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:59:06,295 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 22:59:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 22:59:06,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:06,305 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] [2021-12-15 22:59:06,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-12-15 22:59:06,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196997563] [2021-12-15 22:59:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:06,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:06,570 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 22:59:06,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196997563] [2021-12-15 22:59:06,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196997563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:06,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:06,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:06,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819190716] [2021-12-15 22:59:06,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:06,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:06,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:06,606 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 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 22:59:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:09,089 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-15 22:59:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-15 22:59:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:09,109 INFO L225 Difference]: With dead ends: 1642 [2021-12-15 22:59:09,109 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 22:59:09,115 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 22:59:09,118 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 444 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 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, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:09,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:59:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 22:59:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-15 22:59:09,184 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 22:59:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-15 22:59:09,188 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 46 [2021-12-15 22:59:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:09,189 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-15 22:59:09,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 22:59:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-15 22:59:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 22:59:09,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:09,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:09,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:59:09,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1486088630, now seen corresponding path program 1 times [2021-12-15 22:59:09,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:09,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50592978] [2021-12-15 22:59:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:09,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:09,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:09,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50592978] [2021-12-15 22:59:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50592978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:09,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:09,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:09,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674628558] [2021-12-15 22:59:09,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:09,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:09,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:09,355 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 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 22:59:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:13,085 INFO L93 Difference]: Finished difference Result 3735 states and 5654 transitions. [2021-12-15 22:59:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:59:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 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 22:59:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:13,096 INFO L225 Difference]: With dead ends: 3735 [2021-12-15 22:59:13,097 INFO L226 Difference]: Without dead ends: 2765 [2021-12-15 22:59:13,098 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 [2021-12-15 22:59:13,100 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 873 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:13,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 314 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 22:59:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-12-15 22:59:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2724. [2021-12-15 22:59:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.3944179214102093) internal successors, (3797), 2723 states have internal predecessors, (3797), 0 states have call successors, (0), 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 22:59:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3797 transitions. [2021-12-15 22:59:13,156 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3797 transitions. Word has length 116 [2021-12-15 22:59:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:13,159 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3797 transitions. [2021-12-15 22:59:13,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 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 22:59:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3797 transitions. [2021-12-15 22:59:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-15 22:59:13,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:13,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:13,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:59:13,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1102935076, now seen corresponding path program 1 times [2021-12-15 22:59:13,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648509192] [2021-12-15 22:59:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:13,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:13,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648509192] [2021-12-15 22:59:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648509192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:13,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:13,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:13,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068875732] [2021-12-15 22:59:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:13,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:13,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:13,343 INFO L87 Difference]: Start difference. First operand 2724 states and 3797 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 22:59:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:15,553 INFO L93 Difference]: Finished difference Result 6325 states and 8834 transitions. [2021-12-15 22:59:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-12-15 22:59:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:15,566 INFO L225 Difference]: With dead ends: 6325 [2021-12-15 22:59:15,566 INFO L226 Difference]: Without dead ends: 3603 [2021-12-15 22:59:15,570 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 22:59:15,571 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:15,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:59:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-12-15 22:59:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3583. [2021-12-15 22:59:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3604131769960917) internal successors, (4873), 3582 states have internal predecessors, (4873), 0 states have call successors, (0), 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 22:59:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4873 transitions. [2021-12-15 22:59:15,660 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4873 transitions. Word has length 151 [2021-12-15 22:59:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:15,662 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4873 transitions. [2021-12-15 22:59:15,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 22:59:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4873 transitions. [2021-12-15 22:59:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-15 22:59:15,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:15,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:15,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:59:15,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2111347437, now seen corresponding path program 1 times [2021-12-15 22:59:15,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187508855] [2021-12-15 22:59:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:15,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187508855] [2021-12-15 22:59:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187508855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:15,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436561001] [2021-12-15 22:59:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:15,844 INFO L87 Difference]: Start difference. First operand 3583 states and 4873 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 22:59:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:17,866 INFO L93 Difference]: Finished difference Result 6753 states and 9152 transitions. [2021-12-15 22:59:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:59:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-12-15 22:59:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:17,877 INFO L225 Difference]: With dead ends: 6753 [2021-12-15 22:59:17,877 INFO L226 Difference]: Without dead ends: 3172 [2021-12-15 22:59:17,882 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 22:59:17,883 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:17,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:59:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-12-15 22:59:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3149. [2021-12-15 22:59:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 1.3430749682337992) internal successors, (4228), 3148 states have internal predecessors, (4228), 0 states have call successors, (0), 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 22:59:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4228 transitions. [2021-12-15 22:59:17,940 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4228 transitions. Word has length 157 [2021-12-15 22:59:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:17,941 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 4228 transitions. [2021-12-15 22:59:17,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 22:59:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4228 transitions. [2021-12-15 22:59:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-15 22:59:17,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:17,944 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, 2, 2, 2, 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 22:59:17,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:59:17,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1454031604, now seen corresponding path program 1 times [2021-12-15 22:59:17,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536046425] [2021-12-15 22:59:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 22:59:18,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536046425] [2021-12-15 22:59:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536046425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:18,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:18,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:18,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166058532] [2021-12-15 22:59:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:18,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:18,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:18,090 INFO L87 Difference]: Start difference. First operand 3149 states and 4228 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 22:59:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:19,886 INFO L93 Difference]: Finished difference Result 8434 states and 11589 transitions. [2021-12-15 22:59:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 187 [2021-12-15 22:59:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:19,903 INFO L225 Difference]: With dead ends: 8434 [2021-12-15 22:59:19,904 INFO L226 Difference]: Without dead ends: 4853 [2021-12-15 22:59:19,909 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 22:59:19,912 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 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 22:59:19,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:59:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2021-12-15 22:59:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4001. [2021-12-15 22:59:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 1.22775) internal successors, (4911), 4000 states have internal predecessors, (4911), 0 states have call successors, (0), 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 22:59:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4911 transitions. [2021-12-15 22:59:19,973 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4911 transitions. Word has length 187 [2021-12-15 22:59:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:19,973 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 4911 transitions. [2021-12-15 22:59:19,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 22:59:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4911 transitions. [2021-12-15 22:59:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 22:59:19,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:19,980 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, 2, 2, 2, 2, 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 22:59:19,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:59:19,982 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash 877442312, now seen corresponding path program 1 times [2021-12-15 22:59:19,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827527200] [2021-12-15 22:59:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:19,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:59:20,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827527200] [2021-12-15 22:59:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827527200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:20,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:20,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477724629] [2021-12-15 22:59:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:20,085 INFO L87 Difference]: Start difference. First operand 4001 states and 4911 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 22:59:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:21,945 INFO L93 Difference]: Finished difference Result 10125 states and 12629 transitions. [2021-12-15 22:59:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 200 [2021-12-15 22:59:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:21,964 INFO L225 Difference]: With dead ends: 10125 [2021-12-15 22:59:21,964 INFO L226 Difference]: Without dead ends: 6126 [2021-12-15 22:59:21,969 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 22:59:21,970 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 414 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:21,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 477 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:59:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-12-15 22:59:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3978. [2021-12-15 22:59:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.2260497862710587) internal successors, (4876), 3977 states have internal predecessors, (4876), 0 states have call successors, (0), 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 22:59:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4876 transitions. [2021-12-15 22:59:22,039 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4876 transitions. Word has length 200 [2021-12-15 22:59:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:22,040 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 4876 transitions. [2021-12-15 22:59:22,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 22:59:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4876 transitions. [2021-12-15 22:59:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 22:59:22,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:22,043 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:59:22,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:59:22,043 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1977830355, now seen corresponding path program 1 times [2021-12-15 22:59:22,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429149433] [2021-12-15 22:59:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:22,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:22,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429149433] [2021-12-15 22:59:22,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429149433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:22,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:22,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:22,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336469510] [2021-12-15 22:59:22,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:22,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:22,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:22,117 INFO L87 Difference]: Start difference. First operand 3978 states and 4876 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:59:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:23,711 INFO L93 Difference]: Finished difference Result 10511 states and 13139 transitions. [2021-12-15 22:59:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2021-12-15 22:59:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:23,743 INFO L225 Difference]: With dead ends: 10511 [2021-12-15 22:59:23,743 INFO L226 Difference]: Without dead ends: 6535 [2021-12-15 22:59:23,748 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 22:59:23,752 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 487 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:23,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 788 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:59:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-12-15 22:59:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6535. [2021-12-15 22:59:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6535 states, 6534 states have (on average 1.2058463422099786) internal successors, (7879), 6534 states have internal predecessors, (7879), 0 states have call successors, (0), 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 22:59:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 7879 transitions. [2021-12-15 22:59:23,850 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 7879 transitions. Word has length 207 [2021-12-15 22:59:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:23,850 INFO L470 AbstractCegarLoop]: Abstraction has 6535 states and 7879 transitions. [2021-12-15 22:59:23,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:59:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 7879 transitions. [2021-12-15 22:59:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 22:59:23,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:23,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-15 22:59:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:59:23,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1969648980, now seen corresponding path program 1 times [2021-12-15 22:59:23,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:23,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474109049] [2021-12-15 22:59:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:23,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:59:24,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474109049] [2021-12-15 22:59:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474109049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077151904] [2021-12-15 22:59:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:24,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:59:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:24,011 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 22:59:24,020 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 22:59:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:59:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:59:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:59:25,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:59:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:59:25,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077151904] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:25,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 22:59:25,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 22:59:25,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003273707] [2021-12-15 22:59:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:25,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:25,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:59:25,657 INFO L87 Difference]: Start difference. First operand 6535 states and 7879 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 22:59:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:28,713 INFO L93 Difference]: Finished difference Result 21183 states and 25861 transitions. [2021-12-15 22:59:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:59:28,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 270 [2021-12-15 22:59:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:28,734 INFO L225 Difference]: With dead ends: 21183 [2021-12-15 22:59:28,734 INFO L226 Difference]: Without dead ends: 14218 [2021-12-15 22:59:28,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 535 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 22:59:28,745 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1071 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:28,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 147 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:59:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2021-12-15 22:59:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2021-12-15 22:59:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14216 states, 14215 states have (on average 1.1974674639465352) internal successors, (17022), 14215 states have internal predecessors, (17022), 0 states have call successors, (0), 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 22:59:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 17022 transitions. [2021-12-15 22:59:28,996 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 17022 transitions. Word has length 270 [2021-12-15 22:59:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 14216 states and 17022 transitions. [2021-12-15 22:59:28,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 22:59:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 17022 transitions. [2021-12-15 22:59:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 22:59:29,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:29,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:29,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:59:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:59:29,216 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2103078840, now seen corresponding path program 1 times [2021-12-15 22:59:29,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:29,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951023826] [2021-12-15 22:59:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:29,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 22:59:29,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951023826] [2021-12-15 22:59:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951023826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:29,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:29,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:29,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070505761] [2021-12-15 22:59:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:29,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:29,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:29,319 INFO L87 Difference]: Start difference. First operand 14216 states and 17022 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 22:59:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:30,917 INFO L93 Difference]: Finished difference Result 31407 states and 37752 transitions. [2021-12-15 22:59:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 283 [2021-12-15 22:59:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:30,946 INFO L225 Difference]: With dead ends: 31407 [2021-12-15 22:59:30,946 INFO L226 Difference]: Without dead ends: 17193 [2021-12-15 22:59:30,961 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 22:59:30,964 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 373 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:30,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 904 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:59:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17193 states. [2021-12-15 22:59:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17193 to 16767. [2021-12-15 22:59:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16767 states, 16766 states have (on average 1.181617559346296) internal successors, (19811), 16766 states have internal predecessors, (19811), 0 states have call successors, (0), 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 22:59:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16767 states to 16767 states and 19811 transitions. [2021-12-15 22:59:31,277 INFO L78 Accepts]: Start accepts. Automaton has 16767 states and 19811 transitions. Word has length 283 [2021-12-15 22:59:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 16767 states and 19811 transitions. [2021-12-15 22:59:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 22:59:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16767 states and 19811 transitions. [2021-12-15 22:59:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-15 22:59:31,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:31,288 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:59:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:59:31,288 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1063038644, now seen corresponding path program 1 times [2021-12-15 22:59:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603620835] [2021-12-15 22:59:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:31,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 22:59:31,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603620835] [2021-12-15 22:59:31,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603620835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:31,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:31,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:31,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826300068] [2021-12-15 22:59:31,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:31,387 INFO L87 Difference]: Start difference. First operand 16767 states and 19811 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 22:59:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:33,148 INFO L93 Difference]: Finished difference Result 37785 states and 44619 transitions. [2021-12-15 22:59:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 284 [2021-12-15 22:59:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:33,177 INFO L225 Difference]: With dead ends: 37785 [2021-12-15 22:59:33,177 INFO L226 Difference]: Without dead ends: 20586 [2021-12-15 22:59:33,196 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 22:59:33,197 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 447 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:33,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 391 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:59:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20586 states. [2021-12-15 22:59:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20586 to 19304. [2021-12-15 22:59:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19304 states, 19303 states have (on average 1.1638605398124644) internal successors, (22466), 19303 states have internal predecessors, (22466), 0 states have call successors, (0), 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 22:59:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19304 states to 19304 states and 22466 transitions. [2021-12-15 22:59:33,534 INFO L78 Accepts]: Start accepts. Automaton has 19304 states and 22466 transitions. Word has length 284 [2021-12-15 22:59:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:33,534 INFO L470 AbstractCegarLoop]: Abstraction has 19304 states and 22466 transitions. [2021-12-15 22:59:33,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 22:59:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 19304 states and 22466 transitions. [2021-12-15 22:59:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 22:59:33,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:33,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:33,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:59:33,542 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 505503923, now seen corresponding path program 1 times [2021-12-15 22:59:33,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652195079] [2021-12-15 22:59:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:33,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 22:59:33,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652195079] [2021-12-15 22:59:33,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652195079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:33,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:33,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:59:33,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294709948] [2021-12-15 22:59:33,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:33,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:33,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:33,660 INFO L87 Difference]: Start difference. First operand 19304 states and 22466 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:36,741 INFO L93 Difference]: Finished difference Result 56537 states and 65555 transitions. [2021-12-15 22:59:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:59:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-15 22:59:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:36,797 INFO L225 Difference]: With dead ends: 56537 [2021-12-15 22:59:36,797 INFO L226 Difference]: Without dead ends: 34257 [2021-12-15 22:59:36,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:36,816 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 867 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:36,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 348 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:59:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34257 states. [2021-12-15 22:59:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34257 to 33356. [2021-12-15 22:59:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33356 states, 33355 states have (on average 1.1540698545945136) internal successors, (38494), 33355 states have internal predecessors, (38494), 0 states have call successors, (0), 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 22:59:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33356 states to 33356 states and 38494 transitions. [2021-12-15 22:59:37,301 INFO L78 Accepts]: Start accepts. Automaton has 33356 states and 38494 transitions. Word has length 306 [2021-12-15 22:59:37,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:37,301 INFO L470 AbstractCegarLoop]: Abstraction has 33356 states and 38494 transitions. [2021-12-15 22:59:37,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33356 states and 38494 transitions. [2021-12-15 22:59:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 22:59:37,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:37,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:37,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:59:37,308 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -948205666, now seen corresponding path program 1 times [2021-12-15 22:59:37,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:37,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425999000] [2021-12-15 22:59:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:37,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:59:37,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425999000] [2021-12-15 22:59:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425999000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:37,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:37,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091028016] [2021-12-15 22:59:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:37,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:37,425 INFO L87 Difference]: Start difference. First operand 33356 states and 38494 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 22:59:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:39,431 INFO L93 Difference]: Finished difference Result 84186 states and 96830 transitions. [2021-12-15 22:59:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 321 [2021-12-15 22:59:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:39,495 INFO L225 Difference]: With dead ends: 84186 [2021-12-15 22:59:39,496 INFO L226 Difference]: Without dead ends: 49130 [2021-12-15 22:59:39,520 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 22:59:39,520 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 364 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:39,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 812 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:59:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49130 states. [2021-12-15 22:59:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49130 to 47418. [2021-12-15 22:59:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47418 states, 47417 states have (on average 1.119978066938018) internal successors, (53106), 47417 states have internal predecessors, (53106), 0 states have call successors, (0), 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 22:59:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47418 states to 47418 states and 53106 transitions. [2021-12-15 22:59:40,165 INFO L78 Accepts]: Start accepts. Automaton has 47418 states and 53106 transitions. Word has length 321 [2021-12-15 22:59:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:40,165 INFO L470 AbstractCegarLoop]: Abstraction has 47418 states and 53106 transitions. [2021-12-15 22:59:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 22:59:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 47418 states and 53106 transitions. [2021-12-15 22:59:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 22:59:40,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:40,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 22:59:40,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:59:40,173 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash 966513164, now seen corresponding path program 1 times [2021-12-15 22:59:40,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:40,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066990696] [2021-12-15 22:59:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:40,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 22:59:40,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:40,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066990696] [2021-12-15 22:59:40,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066990696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:40,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:40,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:40,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639127970] [2021-12-15 22:59:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:40,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:40,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:40,311 INFO L87 Difference]: Start difference. First operand 47418 states and 53106 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 22:59:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:41,953 INFO L93 Difference]: Finished difference Result 95685 states and 107100 transitions. [2021-12-15 22:59:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-12-15 22:59:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:41,997 INFO L225 Difference]: With dead ends: 95685 [2021-12-15 22:59:41,997 INFO L226 Difference]: Without dead ends: 47844 [2021-12-15 22:59:42,025 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 22:59:42,026 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 383 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:42,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 882 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:59:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47844 states. [2021-12-15 22:59:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47844 to 47843. [2021-12-15 22:59:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47843 states, 47842 states have (on average 1.11828518874629) internal successors, (53501), 47842 states have internal predecessors, (53501), 0 states have call successors, (0), 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 22:59:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47843 states to 47843 states and 53501 transitions. [2021-12-15 22:59:42,553 INFO L78 Accepts]: Start accepts. Automaton has 47843 states and 53501 transitions. Word has length 340 [2021-12-15 22:59:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 47843 states and 53501 transitions. [2021-12-15 22:59:42,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 22:59:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 47843 states and 53501 transitions. [2021-12-15 22:59:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-15 22:59:42,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:42,560 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:59:42,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 932540690, now seen corresponding path program 1 times [2021-12-15 22:59:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994449539] [2021-12-15 22:59:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:42,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 340 proven. 214 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 22:59:42,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994449539] [2021-12-15 22:59:42,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994449539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939780657] [2021-12-15 22:59:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:42,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:59:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:42,820 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 22:59:42,821 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 22:59:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:59:42,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:59:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 367 proven. 73 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 22:59:43,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:59:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-15 22:59:44,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939780657] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:44,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 22:59:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-15 22:59:44,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533534654] [2021-12-15 22:59:44,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:44,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:44,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:59:44,349 INFO L87 Difference]: Start difference. First operand 47843 states and 53501 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 22:59:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:47,520 INFO L93 Difference]: Finished difference Result 111881 states and 125398 transitions. [2021-12-15 22:59:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:59:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 344 [2021-12-15 22:59:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:47,649 INFO L225 Difference]: With dead ends: 111881 [2021-12-15 22:59:47,649 INFO L226 Difference]: Without dead ends: 64040 [2021-12-15 22:59:47,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:59:47,681 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 856 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:47,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 204 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:59:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64040 states. [2021-12-15 22:59:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64040 to 60635. [2021-12-15 22:59:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60635 states, 60634 states have (on average 1.12387439390441) internal successors, (68145), 60634 states have internal predecessors, (68145), 0 states have call successors, (0), 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 22:59:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60635 states to 60635 states and 68145 transitions. [2021-12-15 22:59:48,355 INFO L78 Accepts]: Start accepts. Automaton has 60635 states and 68145 transitions. Word has length 344 [2021-12-15 22:59:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:48,355 INFO L470 AbstractCegarLoop]: Abstraction has 60635 states and 68145 transitions. [2021-12-15 22:59:48,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 22:59:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60635 states and 68145 transitions. [2021-12-15 22:59:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 22:59:48,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:48,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 22:59:48,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 22:59:48,583 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,SelfDestructingSolverStorable13 [2021-12-15 22:59:48,584 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1745749995, now seen corresponding path program 1 times [2021-12-15 22:59:48,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275024838] [2021-12-15 22:59:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:48,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 22:59:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:48,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275024838] [2021-12-15 22:59:48,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275024838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:48,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:48,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:48,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733628421] [2021-12-15 22:59:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:48,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:48,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:48,720 INFO L87 Difference]: Start difference. First operand 60635 states and 68145 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 22:59:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:50,808 INFO L93 Difference]: Finished difference Result 130651 states and 147068 transitions. [2021-12-15 22:59:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 [2021-12-15 22:59:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:51,030 INFO L225 Difference]: With dead ends: 130651 [2021-12-15 22:59:51,030 INFO L226 Difference]: Without dead ends: 69587 [2021-12-15 22:59:51,060 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 22:59:51,061 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 473 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:51,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 322 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:59:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69587 states. [2021-12-15 22:59:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69587 to 67880. [2021-12-15 22:59:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67880 states, 67879 states have (on average 1.1204643556917455) internal successors, (76056), 67879 states have internal predecessors, (76056), 0 states have call successors, (0), 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 22:59:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67880 states to 67880 states and 76056 transitions. [2021-12-15 22:59:51,736 INFO L78 Accepts]: Start accepts. Automaton has 67880 states and 76056 transitions. Word has length 358 [2021-12-15 22:59:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 67880 states and 76056 transitions. [2021-12-15 22:59:51,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 22:59:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 67880 states and 76056 transitions. [2021-12-15 22:59:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-15 22:59:51,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:51,743 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 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 22:59:51,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:59:51,743 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1459095844, now seen corresponding path program 1 times [2021-12-15 22:59:51,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:51,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935173451] [2021-12-15 22:59:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:51,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-15 22:59:51,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935173451] [2021-12-15 22:59:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935173451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:51,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:51,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:51,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762719827] [2021-12-15 22:59:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:51,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:51,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:51,852 INFO L87 Difference]: Start difference. First operand 67880 states and 76056 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 22:59:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:53,988 INFO L93 Difference]: Finished difference Result 153201 states and 171684 transitions. [2021-12-15 22:59:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 374 [2021-12-15 22:59:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:54,076 INFO L225 Difference]: With dead ends: 153201 [2021-12-15 22:59:54,076 INFO L226 Difference]: Without dead ends: 84471 [2021-12-15 22:59:54,117 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 22:59:54,117 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 385 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:54,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 844 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:59:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84471 states. [2021-12-15 22:59:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84471 to 68694. [2021-12-15 22:59:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68694 states, 68693 states have (on average 1.1177994846636483) internal successors, (76785), 68693 states have internal predecessors, (76785), 0 states have call successors, (0), 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 22:59:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68694 states to 68694 states and 76785 transitions. [2021-12-15 22:59:55,009 INFO L78 Accepts]: Start accepts. Automaton has 68694 states and 76785 transitions. Word has length 374 [2021-12-15 22:59:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:55,010 INFO L470 AbstractCegarLoop]: Abstraction has 68694 states and 76785 transitions. [2021-12-15 22:59:55,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 22:59:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 68694 states and 76785 transitions. [2021-12-15 22:59:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-15 22:59:55,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:55,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:55,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:59:55,017 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 581192442, now seen corresponding path program 1 times [2021-12-15 22:59:55,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:55,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050105769] [2021-12-15 22:59:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:55,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 22:59:55,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:55,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050105769] [2021-12-15 22:59:55,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050105769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:55,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:55,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:55,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180887680] [2021-12-15 22:59:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:55,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:55,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:55,150 INFO L87 Difference]: Start difference. First operand 68694 states and 76785 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)