./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 d33c1f18af8463c39a69fa160e98d9892e84f7d8b10911d6b0c55a462978880c --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:32:38,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:32:38,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:32:38,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:32:38,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:32:38,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:32:38,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:32:38,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:32:38,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:32:38,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:32:38,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:32:38,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:32:38,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:32:38,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:32:38,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:32:38,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:32:38,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:32:38,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:32:38,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:32:38,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:32:38,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:32:38,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:32:38,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:32:38,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:32:38,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:32:38,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:32:38,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:32:38,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:32:38,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:32:38,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:32:38,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:32:38,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:32:38,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:32:38,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:32:38,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:32:38,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:32:38,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:32:38,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:32:38,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:32:38,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:32:38,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:32:38,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:32:38,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:32:38,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:32:38,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:32:38,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:32:38,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:32:38,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:32:38,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:32:38,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:32:38,345 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:32:38,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:32:38,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:32:38,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:32:38,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:32:38,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:32:38,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:32:38,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:32:38,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:32:38,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:32:38,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:32:38,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:32:38,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:32:38,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:32:38,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:32:38,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:32:38,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:32:38,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:32:38,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:32:38,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:32:38,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d33c1f18af8463c39a69fa160e98d9892e84f7d8b10911d6b0c55a462978880c [2021-12-15 11:32:38,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:32:38,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:32:38,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:32:38,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:32:38,580 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:32:38,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:32:38,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5a3b6be/b6d801a208b64d98aef00572f8da9c66/FLAG9f8f9f9b3 [2021-12-15 11:32:39,006 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:32:39,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:32:39,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5a3b6be/b6d801a208b64d98aef00572f8da9c66/FLAG9f8f9f9b3 [2021-12-15 11:32:39,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5a3b6be/b6d801a208b64d98aef00572f8da9c66 [2021-12-15 11:32:39,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:32:39,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:32:39,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:32:39,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:32:39,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:32:39,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e54180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39, skipping insertion in model container [2021-12-15 11:32:39,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:32:39,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:32:39,287 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2021-12-15 11:32:39,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:32:39,312 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:32:39,335 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2021-12-15 11:32:39,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:32:39,353 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:32:39,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39 WrapperNode [2021-12-15 11:32:39,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:32:39,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:32:39,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:32:39,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:32:39,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,398 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 267 [2021-12-15 11:32:39,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:32:39,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:32:39,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:32:39,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:32:39,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:32:39,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:32:39,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:32:39,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:32:39,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (1/1) ... [2021-12-15 11:32:39,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:32:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:32:39,459 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 11:32:39,460 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 11:32:39,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:32:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:32:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:32:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:32:39,592 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:32:39,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:32:39,924 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:32:39,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:32:39,929 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:32:39,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:32:39 BoogieIcfgContainer [2021-12-15 11:32:39,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:32:39,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:32:39,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:32:39,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:32:39,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:32:39" (1/3) ... [2021-12-15 11:32:39,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dd1985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:32:39, skipping insertion in model container [2021-12-15 11:32:39,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:32:39" (2/3) ... [2021-12-15 11:32:39,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dd1985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:32:39, skipping insertion in model container [2021-12-15 11:32:39,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:32:39" (3/3) ... [2021-12-15 11:32:39,949 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-15 11:32:39,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:32:39,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:32:39,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:32:40,004 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 11:32:40,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:32:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 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 11:32:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:32:40,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:40,029 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] [2021-12-15 11:32:40,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash -976687966, now seen corresponding path program 1 times [2021-12-15 11:32:40,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:40,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547057426] [2021-12-15 11:32:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:40,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:40,319 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 11:32:40,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:40,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547057426] [2021-12-15 11:32:40,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547057426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:40,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:40,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:32:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614443456] [2021-12-15 11:32:40,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:40,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:32:40,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:32:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:32:40,353 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 11:32:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:40,429 INFO L93 Difference]: Finished difference Result 146 states and 230 transitions. [2021-12-15 11:32:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:32:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-15 11:32:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:40,444 INFO L225 Difference]: With dead ends: 146 [2021-12-15 11:32:40,444 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 11:32:40,448 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 11:32:40,452 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 61 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:40,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 211 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 11:32:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-15 11:32:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4782608695652173) internal successors, (136), 92 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-12-15 11:32:40,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 37 [2021-12-15 11:32:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:40,504 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-12-15 11:32:40,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 11:32:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-12-15 11:32:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 11:32:40,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:40,509 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] [2021-12-15 11:32:40,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:32:40,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1572742836, now seen corresponding path program 1 times [2021-12-15 11:32:40,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083993374] [2021-12-15 11:32:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:40,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:40,588 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 11:32:40,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083993374] [2021-12-15 11:32:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083993374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:40,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:40,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:32:40,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682804186] [2021-12-15 11:32:40,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:40,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:32:40,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:32:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:32:40,591 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 11:32:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:40,622 INFO L93 Difference]: Finished difference Result 225 states and 344 transitions. [2021-12-15 11:32:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:32:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-15 11:32:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:40,628 INFO L225 Difference]: With dead ends: 225 [2021-12-15 11:32:40,628 INFO L226 Difference]: Without dead ends: 151 [2021-12-15 11:32:40,631 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 11:32:40,632 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:40,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-15 11:32:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-12-15 11:32:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5135135135135136) internal successors, (224), 148 states have internal predecessors, (224), 0 states have call successors, (0), 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 11:32:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2021-12-15 11:32:40,684 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 38 [2021-12-15 11:32:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:40,684 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2021-12-15 11:32:40,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 11:32:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2021-12-15 11:32:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 11:32:40,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:40,687 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] [2021-12-15 11:32:40,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:32:40,688 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1624580866, now seen corresponding path program 1 times [2021-12-15 11:32:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433626417] [2021-12-15 11:32:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:40,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:40,739 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 11:32:40,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:40,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433626417] [2021-12-15 11:32:40,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433626417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:40,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:40,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:40,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128357830] [2021-12-15 11:32:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:40,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:40,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:40,742 INFO L87 Difference]: Start difference. First operand 149 states and 224 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 11:32:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:40,897 INFO L93 Difference]: Finished difference Result 929 states and 1454 transitions. [2021-12-15 11:32:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:32:40,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-12-15 11:32:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:40,901 INFO L225 Difference]: With dead ends: 929 [2021-12-15 11:32:40,901 INFO L226 Difference]: Without dead ends: 799 [2021-12-15 11:32:40,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:32:40,903 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 410 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:40,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 575 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:32:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-15 11:32:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 277. [2021-12-15 11:32:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.5217391304347827) internal successors, (420), 276 states have internal predecessors, (420), 0 states have call successors, (0), 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 11:32:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 420 transitions. [2021-12-15 11:32:40,951 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 420 transitions. Word has length 39 [2021-12-15 11:32:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:40,952 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 420 transitions. [2021-12-15 11:32:40,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 11:32:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 420 transitions. [2021-12-15 11:32:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 11:32:40,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:40,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:32:40,955 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1224060410, now seen corresponding path program 1 times [2021-12-15 11:32:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112819823] [2021-12-15 11:32:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:40,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,013 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 11:32:41,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112819823] [2021-12-15 11:32:41,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112819823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:32:41,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394937502] [2021-12-15 11:32:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:32:41,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:32:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:32:41,021 INFO L87 Difference]: Start difference. First operand 277 states and 420 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,053 INFO L93 Difference]: Finished difference Result 749 states and 1146 transitions. [2021-12-15 11:32:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:32:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 11:32:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,057 INFO L225 Difference]: With dead ends: 749 [2021-12-15 11:32:41,057 INFO L226 Difference]: Without dead ends: 491 [2021-12-15 11:32:41,058 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 11:32:41,058 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 141 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-15 11:32:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 481. [2021-12-15 11:32:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.4916666666666667) internal successors, (716), 480 states have internal predecessors, (716), 0 states have call successors, (0), 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 11:32:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 716 transitions. [2021-12-15 11:32:41,097 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 716 transitions. Word has length 41 [2021-12-15 11:32:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:41,099 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 716 transitions. [2021-12-15 11:32:41,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 716 transitions. [2021-12-15 11:32:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 11:32:41,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:41,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:41,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:32:41,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1245063065, now seen corresponding path program 1 times [2021-12-15 11:32:41,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:41,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844428656] [2021-12-15 11:32:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:41,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,224 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 11:32:41,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844428656] [2021-12-15 11:32:41,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844428656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:41,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612831052] [2021-12-15 11:32:41,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:41,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:41,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:41,228 INFO L87 Difference]: Start difference. First operand 481 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,288 INFO L93 Difference]: Finished difference Result 945 states and 1414 transitions. [2021-12-15 11:32:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 11:32:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,290 INFO L225 Difference]: With dead ends: 945 [2021-12-15 11:32:41,291 INFO L226 Difference]: Without dead ends: 483 [2021-12-15 11:32:41,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:32:41,292 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 180 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 204 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-15 11:32:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2021-12-15 11:32:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.475) internal successors, (708), 480 states have internal predecessors, (708), 0 states have call successors, (0), 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 11:32:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 708 transitions. [2021-12-15 11:32:41,311 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 708 transitions. Word has length 41 [2021-12-15 11:32:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:41,312 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 708 transitions. [2021-12-15 11:32:41,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 708 transitions. [2021-12-15 11:32:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:32:41,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:41,313 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] [2021-12-15 11:32:41,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:32:41,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:41,314 INFO L85 PathProgramCache]: Analyzing trace with hash -59660072, now seen corresponding path program 1 times [2021-12-15 11:32:41,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:41,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471330416] [2021-12-15 11:32:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:41,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,350 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 11:32:41,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471330416] [2021-12-15 11:32:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471330416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:32:41,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701291893] [2021-12-15 11:32:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:41,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:41,353 INFO L87 Difference]: Start difference. First operand 481 states and 708 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,422 INFO L93 Difference]: Finished difference Result 943 states and 1397 transitions. [2021-12-15 11:32:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:32:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,424 INFO L225 Difference]: With dead ends: 943 [2021-12-15 11:32:41,424 INFO L226 Difference]: Without dead ends: 481 [2021-12-15 11:32:41,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:32:41,426 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 207 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 64 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-12-15 11:32:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2021-12-15 11:32:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.4583333333333333) internal successors, (700), 480 states have internal predecessors, (700), 0 states have call successors, (0), 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 11:32:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 700 transitions. [2021-12-15 11:32:41,451 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 700 transitions. Word has length 42 [2021-12-15 11:32:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:41,451 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 700 transitions. [2021-12-15 11:32:41,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 700 transitions. [2021-12-15 11:32:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:32:41,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:41,452 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] [2021-12-15 11:32:41,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:32:41,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash 805872317, now seen corresponding path program 1 times [2021-12-15 11:32:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755182647] [2021-12-15 11:32:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:41,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,487 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 11:32:41,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755182647] [2021-12-15 11:32:41,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755182647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:32:41,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554385985] [2021-12-15 11:32:41,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:41,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:41,489 INFO L87 Difference]: Start difference. First operand 481 states and 700 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,580 INFO L93 Difference]: Finished difference Result 1201 states and 1774 transitions. [2021-12-15 11:32:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:41,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:32:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,583 INFO L225 Difference]: With dead ends: 1201 [2021-12-15 11:32:41,583 INFO L226 Difference]: Without dead ends: 739 [2021-12-15 11:32:41,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:32:41,585 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 344 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 93 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-12-15 11:32:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2021-12-15 11:32:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 1.4619565217391304) internal successors, (1076), 736 states have internal predecessors, (1076), 0 states have call successors, (0), 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 11:32:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1076 transitions. [2021-12-15 11:32:41,626 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1076 transitions. Word has length 42 [2021-12-15 11:32:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:41,626 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1076 transitions. [2021-12-15 11:32:41,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1076 transitions. [2021-12-15 11:32:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:32:41,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:41,626 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] [2021-12-15 11:32:41,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:32:41,627 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash 933957624, now seen corresponding path program 1 times [2021-12-15 11:32:41,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:41,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770298027] [2021-12-15 11:32:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:41,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,688 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 11:32:41,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770298027] [2021-12-15 11:32:41,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770298027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:41,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714641357] [2021-12-15 11:32:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:41,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:41,689 INFO L87 Difference]: Start difference. First operand 737 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,774 INFO L93 Difference]: Finished difference Result 1344 states and 1963 transitions. [2021-12-15 11:32:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:32:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:32:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,779 INFO L225 Difference]: With dead ends: 1344 [2021-12-15 11:32:41,779 INFO L226 Difference]: Without dead ends: 1342 [2021-12-15 11:32:41,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:32:41,781 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 114 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 407 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-15 11:32:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 769. [2021-12-15 11:32:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.4375) internal successors, (1104), 768 states have internal predecessors, (1104), 0 states have call successors, (0), 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 11:32:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1104 transitions. [2021-12-15 11:32:41,827 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1104 transitions. Word has length 42 [2021-12-15 11:32:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1104 transitions. [2021-12-15 11:32:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1104 transitions. [2021-12-15 11:32:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:32:41,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:41,829 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] [2021-12-15 11:32:41,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:32:41,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 883353381, now seen corresponding path program 1 times [2021-12-15 11:32:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916623520] [2021-12-15 11:32:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:41,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:41,885 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 11:32:41,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916623520] [2021-12-15 11:32:41,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916623520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:41,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:41,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:32:41,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909153488] [2021-12-15 11:32:41,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:32:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:32:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:32:41,888 INFO L87 Difference]: Start difference. First operand 769 states and 1104 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:41,943 INFO L93 Difference]: Finished difference Result 1704 states and 2478 transitions. [2021-12-15 11:32:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:32:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:32:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:41,948 INFO L225 Difference]: With dead ends: 1704 [2021-12-15 11:32:41,948 INFO L226 Difference]: Without dead ends: 1157 [2021-12-15 11:32:41,949 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 11:32:41,950 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 52 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:41,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-12-15 11:32:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1155. [2021-12-15 11:32:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.4298093587521663) internal successors, (1650), 1154 states have internal predecessors, (1650), 0 states have call successors, (0), 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 11:32:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1650 transitions. [2021-12-15 11:32:42,006 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1650 transitions. Word has length 42 [2021-12-15 11:32:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:42,006 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1650 transitions. [2021-12-15 11:32:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 11:32:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1650 transitions. [2021-12-15 11:32:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:32:42,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:42,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:42,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:32:42,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1515661308, now seen corresponding path program 1 times [2021-12-15 11:32:42,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523272909] [2021-12-15 11:32:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:42,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 11:32:42,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523272909] [2021-12-15 11:32:42,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523272909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:42,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:42,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:42,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786726217] [2021-12-15 11:32:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:42,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:42,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:42,083 INFO L87 Difference]: Start difference. First operand 1155 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 11:32:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:42,294 INFO L93 Difference]: Finished difference Result 4923 states and 7048 transitions. [2021-12-15 11:32:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 61 [2021-12-15 11:32:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:42,306 INFO L225 Difference]: With dead ends: 4923 [2021-12-15 11:32:42,307 INFO L226 Difference]: Without dead ends: 3789 [2021-12-15 11:32:42,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:32:42,310 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 226 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:42,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 347 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-12-15 11:32:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 2287. [2021-12-15 11:32:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 1.4251968503937007) internal successors, (3258), 2286 states have internal predecessors, (3258), 0 states have call successors, (0), 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 11:32:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3258 transitions. [2021-12-15 11:32:42,432 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3258 transitions. Word has length 61 [2021-12-15 11:32:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3258 transitions. [2021-12-15 11:32:42,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 11:32:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3258 transitions. [2021-12-15 11:32:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:32:42,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:42,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:42,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:32:42,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1625359882, now seen corresponding path program 1 times [2021-12-15 11:32:42,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:42,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487015995] [2021-12-15 11:32:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:42,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 11:32:42,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:42,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487015995] [2021-12-15 11:32:42,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487015995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:42,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:42,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:42,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944371978] [2021-12-15 11:32:42,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:42,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:42,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:42,471 INFO L87 Difference]: Start difference. First operand 2287 states and 3258 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 11:32:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:42,703 INFO L93 Difference]: Finished difference Result 6055 states and 8656 transitions. [2021-12-15 11:32:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:42,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 61 [2021-12-15 11:32:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:42,717 INFO L225 Difference]: With dead ends: 6055 [2021-12-15 11:32:42,717 INFO L226 Difference]: Without dead ends: 4921 [2021-12-15 11:32:42,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:32:42,720 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 220 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:42,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 384 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4921 states. [2021-12-15 11:32:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4921 to 3987. [2021-12-15 11:32:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 3986 states have (on average 1.417962870045158) internal successors, (5652), 3986 states have internal predecessors, (5652), 0 states have call successors, (0), 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 11:32:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 5652 transitions. [2021-12-15 11:32:42,937 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 5652 transitions. Word has length 61 [2021-12-15 11:32:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:42,937 INFO L470 AbstractCegarLoop]: Abstraction has 3987 states and 5652 transitions. [2021-12-15 11:32:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 11:32:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 5652 transitions. [2021-12-15 11:32:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 11:32:42,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:42,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:42,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:32:42,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2114297975, now seen corresponding path program 1 times [2021-12-15 11:32:42,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612570666] [2021-12-15 11:32:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:42,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:32:42,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612570666] [2021-12-15 11:32:42,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612570666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:42,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:42,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:32:42,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198360415] [2021-12-15 11:32:42,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:42,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:32:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:32:42,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:32:42,986 INFO L87 Difference]: Start difference. First operand 3987 states and 5652 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 11:32:43,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:43,258 INFO L93 Difference]: Finished difference Result 6779 states and 9712 transitions. [2021-12-15 11:32:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:32:43,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 62 [2021-12-15 11:32:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:43,276 INFO L225 Difference]: With dead ends: 6779 [2021-12-15 11:32:43,276 INFO L226 Difference]: Without dead ends: 5849 [2021-12-15 11:32:43,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:32:43,279 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 214 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:43,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 358 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-12-15 11:32:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 4915. [2021-12-15 11:32:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 1.422059422059422) internal successors, (6988), 4914 states have internal predecessors, (6988), 0 states have call successors, (0), 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 11:32:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 6988 transitions. [2021-12-15 11:32:43,534 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 6988 transitions. Word has length 62 [2021-12-15 11:32:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:43,534 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 6988 transitions. [2021-12-15 11:32:43,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 11:32:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 6988 transitions. [2021-12-15 11:32:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:32:43,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:43,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:43,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:32:43,536 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash -344216809, now seen corresponding path program 1 times [2021-12-15 11:32:43,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:43,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473120386] [2021-12-15 11:32:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:43,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:32:43,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473120386] [2021-12-15 11:32:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473120386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:32:43,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:32:43,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:32:43,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762167618] [2021-12-15 11:32:43,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:32:43,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:32:43,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:32:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:32:43,585 INFO L87 Difference]: Start difference. First operand 4915 states and 6988 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:43,865 INFO L93 Difference]: Finished difference Result 9121 states and 13033 transitions. [2021-12-15 11:32:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:32:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 11:32:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:43,880 INFO L225 Difference]: With dead ends: 9121 [2021-12-15 11:32:43,880 INFO L226 Difference]: Without dead ends: 4227 [2021-12-15 11:32:43,888 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 11:32:43,889 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:43,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 176 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:32:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-12-15 11:32:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2021-12-15 11:32:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4224 states have (on average 1.418560606060606) internal successors, (5992), 4224 states have internal predecessors, (5992), 0 states have call successors, (0), 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 11:32:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 5992 transitions. [2021-12-15 11:32:44,116 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 5992 transitions. Word has length 63 [2021-12-15 11:32:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:44,117 INFO L470 AbstractCegarLoop]: Abstraction has 4225 states and 5992 transitions. [2021-12-15 11:32:44,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:32:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 5992 transitions. [2021-12-15 11:32:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:32:44,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:44,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:32:44,118 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2058333971, now seen corresponding path program 1 times [2021-12-15 11:32:44,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:44,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800303351] [2021-12-15 11:32:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:44,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:32:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800303351] [2021-12-15 11:32:44,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800303351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:32:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652835711] [2021-12-15 11:32:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:44,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:32:44,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:32:44,352 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 11:32:44,365 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 11:32:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 11:32:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:32:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:32:44,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:32:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:32:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652835711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:32:44,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:32:44,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-15 11:32:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185244668] [2021-12-15 11:32:44,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:32:44,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 11:32:44,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 11:32:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-15 11:32:44,998 INFO L87 Difference]: Start difference. First operand 4225 states and 5992 transitions. Second operand has 18 states, 18 states have (on average 9.722222222222221) internal successors, (175), 18 states have internal predecessors, (175), 0 states have call successors, (0), 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 11:32:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:32:52,713 INFO L93 Difference]: Finished difference Result 52889 states and 72308 transitions. [2021-12-15 11:32:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-15 11:32:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.722222222222221) internal successors, (175), 18 states have internal predecessors, (175), 0 states have call successors, (0), 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 63 [2021-12-15 11:32:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:32:52,837 INFO L225 Difference]: With dead ends: 52889 [2021-12-15 11:32:52,837 INFO L226 Difference]: Without dead ends: 48711 [2021-12-15 11:32:52,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9827 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3667, Invalid=19589, Unknown=0, NotChecked=0, Total=23256 [2021-12-15 11:32:52,868 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 3590 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3590 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:32:52,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3590 Valid, 1116 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 11:32:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48711 states. [2021-12-15 11:32:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48711 to 21562. [2021-12-15 11:32:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21562 states, 21561 states have (on average 1.3568016325773387) internal successors, (29254), 21561 states have internal predecessors, (29254), 0 states have call successors, (0), 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 11:32:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21562 states to 21562 states and 29254 transitions. [2021-12-15 11:32:54,755 INFO L78 Accepts]: Start accepts. Automaton has 21562 states and 29254 transitions. Word has length 63 [2021-12-15 11:32:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:32:54,755 INFO L470 AbstractCegarLoop]: Abstraction has 21562 states and 29254 transitions. [2021-12-15 11:32:54,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.722222222222221) internal successors, (175), 18 states have internal predecessors, (175), 0 states have call successors, (0), 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 11:32:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21562 states and 29254 transitions. [2021-12-15 11:32:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:32:54,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:32:54,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:32:54,776 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 11:32:54,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 11:32:54,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:32:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:32:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2041509104, now seen corresponding path program 1 times [2021-12-15 11:32:54,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:32:54,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263127996] [2021-12-15 11:32:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:54,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:32:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:32:55,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:32:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263127996] [2021-12-15 11:32:55,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263127996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:32:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467387283] [2021-12-15 11:32:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:32:55,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:32:55,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:32:55,176 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 11:32:55,177 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 11:32:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:32:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 11:32:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:32:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:32:55,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:32:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:32:56,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467387283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:32:56,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:32:56,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-15 11:32:56,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589624956] [2021-12-15 11:32:56,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:32:56,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 11:32:56,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:32:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 11:32:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-15 11:32:56,264 INFO L87 Difference]: Start difference. First operand 21562 states and 29254 transitions. Second operand has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 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 11:33:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:33:03,008 INFO L93 Difference]: Finished difference Result 89492 states and 118904 transitions. [2021-12-15 11:33:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 11:33:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 11:33:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:33:03,166 INFO L225 Difference]: With dead ends: 89492 [2021-12-15 11:33:03,166 INFO L226 Difference]: Without dead ends: 71756 [2021-12-15 11:33:03,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1018, Invalid=3538, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 11:33:03,203 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2203 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:33:03,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 1012 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:33:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71756 states. [2021-12-15 11:33:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71756 to 36670. [2021-12-15 11:33:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36670 states, 36669 states have (on average 1.3473506231421637) internal successors, (49406), 36669 states have internal predecessors, (49406), 0 states have call successors, (0), 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 11:33:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36670 states to 36670 states and 49406 transitions. [2021-12-15 11:33:06,683 INFO L78 Accepts]: Start accepts. Automaton has 36670 states and 49406 transitions. Word has length 64 [2021-12-15 11:33:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:33:06,683 INFO L470 AbstractCegarLoop]: Abstraction has 36670 states and 49406 transitions. [2021-12-15 11:33:06,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 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 11:33:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 36670 states and 49406 transitions. [2021-12-15 11:33:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:33:06,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:33:06,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:33:06,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 11:33:06,899 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,SelfDestructingSolverStorable14 [2021-12-15 11:33:06,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:33:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:33:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash 794642143, now seen corresponding path program 1 times [2021-12-15 11:33:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:33:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098660500] [2021-12-15 11:33:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:33:06,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:33:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:33:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:33:07,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:33:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098660500] [2021-12-15 11:33:07,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098660500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:33:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521121473] [2021-12-15 11:33:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:33:07,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:33:07,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:33:07,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:33:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 11:33:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:33:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 11:33:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:33:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:33:08,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:33:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:33:09,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521121473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:33:09,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:33:09,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 17] total 37 [2021-12-15 11:33:09,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572779338] [2021-12-15 11:33:09,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:33:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 11:33:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:33:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 11:33:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 11:33:09,956 INFO L87 Difference]: Start difference. First operand 36670 states and 49406 transitions. Second operand has 38 states, 38 states have (on average 4.394736842105263) internal successors, (167), 37 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)