./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label05.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 db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:35:37,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:35:37,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:35:37,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:35:37,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:35:37,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:35:37,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:35:37,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:35:37,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:35:37,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:35:37,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:35:37,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:35:37,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:35:37,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:35:37,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:35:37,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:35:37,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:35:37,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:35:37,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:35:37,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:35:37,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:35:37,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:35:37,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:35:37,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:35:37,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:35:37,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:35:37,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:35:37,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:35:37,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:35:37,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:35:37,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:35:37,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:35:37,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:35:37,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:35:37,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:35:37,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:35:37,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:35:37,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:35:37,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:35:37,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:35:37,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:35:37,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:35:37,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:35:37,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:35:37,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:35:37,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:35:37,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:35:37,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:35:37,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:35:37,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:35:37,667 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:35:37,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:35:37,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:35:37,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:35:37,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:35:37,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:35:37,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:35:37,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:35:37,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:35:37,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:35:37,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:35:37,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:37,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:35:37,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:35:37,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:35:37,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:35:37,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:35:37,673 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:35:37,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:35:37,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:35:37,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:35:37,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e [2021-12-17 04:35:37,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:35:37,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:35:37,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:35:37,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:35:37,924 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:35:37,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-17 04:35:37,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/941794a3a/8a854c0afcf343d0aa57e8e52849b2e8/FLAG90db3eb97 [2021-12-17 04:35:38,633 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:35:38,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-17 04:35:38,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/941794a3a/8a854c0afcf343d0aa57e8e52849b2e8/FLAG90db3eb97 [2021-12-17 04:35:38,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/941794a3a/8a854c0afcf343d0aa57e8e52849b2e8 [2021-12-17 04:35:38,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:35:38,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:35:38,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:38,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:35:38,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:35:38,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:38" (1/1) ... [2021-12-17 04:35:38,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bce6731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:38, skipping insertion in model container [2021-12-17 04:35:38,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:38" (1/1) ... [2021-12-17 04:35:38,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:35:38,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:35:39,187 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-12-17 04:35:39,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:39,966 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:35:40,001 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-12-17 04:35:40,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:40,458 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:35:40,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40 WrapperNode [2021-12-17 04:35:40,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:40,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:40,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:35:40,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:35:40,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:40,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,084 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:35:41,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:41,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:35:41,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:35:41,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:35:41,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:35:41,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:35:41,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:35:41,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:35:41,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (1/1) ... [2021-12-17 04:35:41,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:35:41,709 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) [2021-12-17 04:35:41,743 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 [2021-12-17 04:35:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:35:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:35:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:35:41,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:35:41,906 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:35:41,908 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:35:46,181 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:35:46,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:35:46,199 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:35:46,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:35:46 BoogieIcfgContainer [2021-12-17 04:35:46,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:35:46,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:35:46,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:35:46,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:35:46,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:35:38" (1/3) ... [2021-12-17 04:35:46,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6145befa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:35:46, skipping insertion in model container [2021-12-17 04:35:46,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:40" (2/3) ... [2021-12-17 04:35:46,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6145befa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:35:46, skipping insertion in model container [2021-12-17 04:35:46,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:35:46" (3/3) ... [2021-12-17 04:35:46,211 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2021-12-17 04:35:46,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:35:46,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:35:46,265 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:35:46,270 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 [2021-12-17 04:35:46,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:35:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 04:35:46,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:46,308 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] [2021-12-17 04:35:46,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-12-17 04:35:46,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:46,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217146781] [2021-12-17 04:35:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:46,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:46,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217146781] [2021-12-17 04:35:46,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217146781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:46,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:46,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:35:46,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784963286] [2021-12-17 04:35:46,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:46,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:46,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:46,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:46,557 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 14.0) internal successors, (42), 2 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) [2021-12-17 04:35:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:50,904 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-17 04:35:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:50,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 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 [2021-12-17 04:35:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:50,928 INFO L225 Difference]: With dead ends: 3121 [2021-12-17 04:35:50,929 INFO L226 Difference]: Without dead ends: 1944 [2021-12-17 04:35:50,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:50,938 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 947 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:50,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 04:35:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-17 04:35:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-17 04:35:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-17 04:35:51,048 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 42 [2021-12-17 04:35:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:51,048 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-17 04:35:51,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 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) [2021-12-17 04:35:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-17 04:35:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 04:35:51,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:51,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:51,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:35:51,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash -274088414, now seen corresponding path program 1 times [2021-12-17 04:35:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283732576] [2021-12-17 04:35:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:51,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:51,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283732576] [2021-12-17 04:35:51,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283732576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:51,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:51,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:51,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943772131] [2021-12-17 04:35:51,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:51,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:35:51,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:35:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:51,300 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:56,473 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-17 04:35:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:35:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-12-17 04:35:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:56,491 INFO L225 Difference]: With dead ends: 6152 [2021-12-17 04:35:56,491 INFO L226 Difference]: Without dead ends: 4281 [2021-12-17 04:35:56,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:35:56,497 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2626 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:56,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 1019 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 04:35:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-17 04:35:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-17 04:35:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4772143024071045) internal successors, (6321), 4279 states have internal predecessors, (6321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6321 transitions. [2021-12-17 04:35:56,596 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6321 transitions. Word has length 107 [2021-12-17 04:35:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:56,596 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6321 transitions. [2021-12-17 04:35:56,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6321 transitions. [2021-12-17 04:35:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-17 04:35:56,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:56,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:56,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:35:56,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -99161038, now seen corresponding path program 1 times [2021-12-17 04:35:56,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:56,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374236969] [2021-12-17 04:35:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:56,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:35:56,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:56,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374236969] [2021-12-17 04:35:56,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374236969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:56,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:56,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:35:56,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277986708] [2021-12-17 04:35:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:56,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:56,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:56,787 INFO L87 Difference]: Start difference. First operand 4280 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:59,929 INFO L93 Difference]: Finished difference Result 10953 states and 16960 transitions. [2021-12-17 04:35:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 209 [2021-12-17 04:35:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:59,959 INFO L225 Difference]: With dead ends: 10953 [2021-12-17 04:35:59,960 INFO L226 Difference]: Without dead ends: 7462 [2021-12-17 04:35:59,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:59,967 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 940 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:59,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 866 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:35:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-12-17 04:36:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7455. [2021-12-17 04:36:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 1.3945532599946338) internal successors, (10395), 7454 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 10395 transitions. [2021-12-17 04:36:00,106 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 10395 transitions. Word has length 209 [2021-12-17 04:36:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:00,108 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 10395 transitions. [2021-12-17 04:36:00,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 10395 transitions. [2021-12-17 04:36:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-17 04:36:00,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:00,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:36:00,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1526135727, now seen corresponding path program 1 times [2021-12-17 04:36:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745008353] [2021-12-17 04:36:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:00,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:36:00,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745008353] [2021-12-17 04:36:00,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745008353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:00,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:00,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:36:00,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121240173] [2021-12-17 04:36:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:00,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:00,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:00,294 INFO L87 Difference]: Start difference. First operand 7455 states and 10395 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:03,136 INFO L93 Difference]: Finished difference Result 20420 states and 29108 transitions. [2021-12-17 04:36:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 223 [2021-12-17 04:36:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:03,183 INFO L225 Difference]: With dead ends: 20420 [2021-12-17 04:36:03,183 INFO L226 Difference]: Without dead ends: 13754 [2021-12-17 04:36:03,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:03,198 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:03,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 988 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-12-17 04:36:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 12964. [2021-12-17 04:36:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2915991668595233) internal successors, (16743), 12963 states have internal predecessors, (16743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16743 transitions. [2021-12-17 04:36:03,449 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16743 transitions. Word has length 223 [2021-12-17 04:36:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:03,450 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16743 transitions. [2021-12-17 04:36:03,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16743 transitions. [2021-12-17 04:36:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-17 04:36:03,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:03,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:36:03,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -851453726, now seen corresponding path program 1 times [2021-12-17 04:36:03,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180202282] [2021-12-17 04:36:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:03,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:03,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180202282] [2021-12-17 04:36:03,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180202282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:03,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:03,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:03,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472447833] [2021-12-17 04:36:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:03,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:03,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:03,589 INFO L87 Difference]: Start difference. First operand 12964 states and 16743 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:06,835 INFO L93 Difference]: Finished difference Result 36960 states and 48179 transitions. [2021-12-17 04:36:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-12-17 04:36:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:06,886 INFO L225 Difference]: With dead ends: 36960 [2021-12-17 04:36:06,886 INFO L226 Difference]: Without dead ends: 24785 [2021-12-17 04:36:06,903 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 [2021-12-17 04:36:06,906 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:06,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:36:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24785 states. [2021-12-17 04:36:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24785 to 24775. [2021-12-17 04:36:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24775 states, 24774 states have (on average 1.2223298619520464) internal successors, (30282), 24774 states have internal predecessors, (30282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24775 states to 24775 states and 30282 transitions. [2021-12-17 04:36:07,287 INFO L78 Accepts]: Start accepts. Automaton has 24775 states and 30282 transitions. Word has length 241 [2021-12-17 04:36:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 24775 states and 30282 transitions. [2021-12-17 04:36:07,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24775 states and 30282 transitions. [2021-12-17 04:36:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-17 04:36:07,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:07,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:07,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:36:07,294 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2028693862, now seen corresponding path program 1 times [2021-12-17 04:36:07,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598253918] [2021-12-17 04:36:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:36:07,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598253918] [2021-12-17 04:36:07,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598253918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:07,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:07,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:07,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002288349] [2021-12-17 04:36:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:07,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:36:07,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:36:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:07,411 INFO L87 Difference]: Start difference. First operand 24775 states and 30282 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:13,900 INFO L93 Difference]: Finished difference Result 74155 states and 91573 transitions. [2021-12-17 04:36:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:36:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 310 [2021-12-17 04:36:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:13,992 INFO L225 Difference]: With dead ends: 74155 [2021-12-17 04:36:13,993 INFO L226 Difference]: Without dead ends: 50169 [2021-12-17 04:36:14,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:14,024 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1733 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 6694 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 6694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:14,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 739 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 6694 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-17 04:36:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50169 states. [2021-12-17 04:36:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50169 to 48475. [2021-12-17 04:36:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 48474 states have (on average 1.2085654165119446) internal successors, (58584), 48474 states have internal predecessors, (58584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 58584 transitions. [2021-12-17 04:36:14,696 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 58584 transitions. Word has length 310 [2021-12-17 04:36:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:14,697 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 58584 transitions. [2021-12-17 04:36:14,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 58584 transitions. [2021-12-17 04:36:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-17 04:36:14,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:14,704 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:14,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:36:14,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -336757840, now seen corresponding path program 1 times [2021-12-17 04:36:14,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432392488] [2021-12-17 04:36:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:14,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:36:14,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432392488] [2021-12-17 04:36:14,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432392488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:14,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:14,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:14,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042055366] [2021-12-17 04:36:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:14,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:14,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:14,836 INFO L87 Difference]: Start difference. First operand 48475 states and 58584 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:18,243 INFO L93 Difference]: Finished difference Result 117449 states and 140608 transitions. [2021-12-17 04:36:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 325 [2021-12-17 04:36:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:18,322 INFO L225 Difference]: With dead ends: 117449 [2021-12-17 04:36:18,322 INFO L226 Difference]: Without dead ends: 69763 [2021-12-17 04:36:18,335 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 [2021-12-17 04:36:18,335 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 755 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:18,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1992 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:36:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69763 states. [2021-12-17 04:36:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69763 to 69728. [2021-12-17 04:36:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69728 states, 69727 states have (on average 1.171411361452522) internal successors, (81679), 69727 states have internal predecessors, (81679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69728 states to 69728 states and 81679 transitions. [2021-12-17 04:36:19,063 INFO L78 Accepts]: Start accepts. Automaton has 69728 states and 81679 transitions. Word has length 325 [2021-12-17 04:36:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:19,063 INFO L470 AbstractCegarLoop]: Abstraction has 69728 states and 81679 transitions. [2021-12-17 04:36:19,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69728 states and 81679 transitions. [2021-12-17 04:36:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-12-17 04:36:19,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:19,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:36:19,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 812269382, now seen corresponding path program 1 times [2021-12-17 04:36:19,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:19,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511189670] [2021-12-17 04:36:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:19,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 223 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:36:19,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:19,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511189670] [2021-12-17 04:36:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511189670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:36:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697493275] [2021-12-17 04:36:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:19,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:36:19,627 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) [2021-12-17 04:36:19,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:36:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:36:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:36:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:36:20,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:36:20,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697493275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:20,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:36:20,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:36:20,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255379713] [2021-12-17 04:36:20,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:20,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:20,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:36:20,407 INFO L87 Difference]: Start difference. First operand 69728 states and 81679 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:23,502 INFO L93 Difference]: Finished difference Result 138665 states and 162563 transitions. [2021-12-17 04:36:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 354 [2021-12-17 04:36:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:23,622 INFO L225 Difference]: With dead ends: 138665 [2021-12-17 04:36:23,622 INFO L226 Difference]: Without dead ends: 69726 [2021-12-17 04:36:23,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:36:23,667 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1138 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:23,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1447 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69726 states. [2021-12-17 04:36:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69726 to 69725. [2021-12-17 04:36:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69725 states, 69724 states have (on average 1.1327806781022316) internal successors, (78982), 69724 states have internal predecessors, (78982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69725 states to 69725 states and 78982 transitions. [2021-12-17 04:36:24,728 INFO L78 Accepts]: Start accepts. Automaton has 69725 states and 78982 transitions. Word has length 354 [2021-12-17 04:36:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:24,729 INFO L470 AbstractCegarLoop]: Abstraction has 69725 states and 78982 transitions. [2021-12-17 04:36:24,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 69725 states and 78982 transitions. [2021-12-17 04:36:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-17 04:36:24,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:24,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:24,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:36:24,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:24,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1537755998, now seen corresponding path program 1 times [2021-12-17 04:36:24,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:24,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912094346] [2021-12-17 04:36:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:24,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:36:25,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912094346] [2021-12-17 04:36:25,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912094346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:25,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:25,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:25,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167764547] [2021-12-17 04:36:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:25,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:25,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:25,062 INFO L87 Difference]: Start difference. First operand 69725 states and 78982 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:28,260 INFO L93 Difference]: Finished difference Result 142574 states and 161063 transitions. [2021-12-17 04:36:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:28,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 359 [2021-12-17 04:36:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:28,373 INFO L225 Difference]: With dead ends: 142574 [2021-12-17 04:36:28,373 INFO L226 Difference]: Without dead ends: 72062 [2021-12-17 04:36:28,438 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 [2021-12-17 04:36:28,439 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 1035 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:28,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1639 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:36:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72062 states. [2021-12-17 04:36:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72062 to 68120. [2021-12-17 04:36:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68120 states, 68119 states have (on average 1.0915163170334268) internal successors, (74353), 68119 states have internal predecessors, (74353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68120 states to 68120 states and 74353 transitions. [2021-12-17 04:36:29,293 INFO L78 Accepts]: Start accepts. Automaton has 68120 states and 74353 transitions. Word has length 359 [2021-12-17 04:36:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:29,293 INFO L470 AbstractCegarLoop]: Abstraction has 68120 states and 74353 transitions. [2021-12-17 04:36:29,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 68120 states and 74353 transitions. [2021-12-17 04:36:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-17 04:36:29,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:29,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:29,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:36:29,299 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 132051312, now seen corresponding path program 1 times [2021-12-17 04:36:29,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611306621] [2021-12-17 04:36:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:29,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:36:29,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611306621] [2021-12-17 04:36:29,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611306621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:29,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:29,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:29,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170165117] [2021-12-17 04:36:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:29,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:29,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:29,441 INFO L87 Difference]: Start difference. First operand 68120 states and 74353 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:32,594 INFO L93 Difference]: Finished difference Result 138625 states and 151125 transitions. [2021-12-17 04:36:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 369 [2021-12-17 04:36:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:32,696 INFO L225 Difference]: With dead ends: 138625 [2021-12-17 04:36:32,696 INFO L226 Difference]: Without dead ends: 71294 [2021-12-17 04:36:32,737 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 [2021-12-17 04:36:32,737 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 836 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:32,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1101 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:36:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71294 states. [2021-12-17 04:36:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71294 to 67332. [2021-12-17 04:36:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67332 states, 67331 states have (on average 1.0818345190179857) internal successors, (72841), 67331 states have internal predecessors, (72841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67332 states to 67332 states and 72841 transitions. [2021-12-17 04:36:33,575 INFO L78 Accepts]: Start accepts. Automaton has 67332 states and 72841 transitions. Word has length 369 [2021-12-17 04:36:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:33,575 INFO L470 AbstractCegarLoop]: Abstraction has 67332 states and 72841 transitions. [2021-12-17 04:36:33,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 67332 states and 72841 transitions. [2021-12-17 04:36:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-17 04:36:33,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:33,580 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:33,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:36:33,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1478414346, now seen corresponding path program 1 times [2021-12-17 04:36:33,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:33,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593491213] [2021-12-17 04:36:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:33,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-17 04:36:33,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593491213] [2021-12-17 04:36:33,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593491213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:33,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:33,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:33,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134629859] [2021-12-17 04:36:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:33,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:33,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:33,710 INFO L87 Difference]: Start difference. First operand 67332 states and 72841 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:37,562 INFO L93 Difference]: Finished difference Result 180347 states and 195876 transitions. [2021-12-17 04:36:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 371 [2021-12-17 04:36:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:37,713 INFO L225 Difference]: With dead ends: 180347 [2021-12-17 04:36:37,713 INFO L226 Difference]: Without dead ends: 113017 [2021-12-17 04:36:37,758 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 [2021-12-17 04:36:37,758 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 925 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:37,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 771 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 04:36:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113017 states. [2021-12-17 04:36:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113017 to 109857. [2021-12-17 04:36:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109857 states, 109856 states have (on average 1.0780021118555199) internal successors, (118425), 109856 states have internal predecessors, (118425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109857 states to 109857 states and 118425 transitions. [2021-12-17 04:36:39,485 INFO L78 Accepts]: Start accepts. Automaton has 109857 states and 118425 transitions. Word has length 371 [2021-12-17 04:36:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:39,486 INFO L470 AbstractCegarLoop]: Abstraction has 109857 states and 118425 transitions. [2021-12-17 04:36:39,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 109857 states and 118425 transitions. [2021-12-17 04:36:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-17 04:36:39,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:39,494 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:36:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:36:39,495 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 722646212, now seen corresponding path program 1 times [2021-12-17 04:36:39,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:39,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853104359] [2021-12-17 04:36:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:39,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:36:39,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853104359] [2021-12-17 04:36:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853104359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:39,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284780531] [2021-12-17 04:36:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:39,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:39,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:39,626 INFO L87 Difference]: Start difference. First operand 109857 states and 118425 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:43,409 INFO L93 Difference]: Finished difference Result 255928 states and 278209 transitions. [2021-12-17 04:36:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 436 [2021-12-17 04:36:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:43,639 INFO L225 Difference]: With dead ends: 255928 [2021-12-17 04:36:43,639 INFO L226 Difference]: Without dead ends: 143712 [2021-12-17 04:36:43,690 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 [2021-12-17 04:36:43,690 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 786 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:43,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1889 Invalid, 3238 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [714 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:36:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143712 states. [2021-12-17 04:36:45,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143712 to 141335. [2021-12-17 04:36:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141335 states, 141334 states have (on average 1.067124683374135) internal successors, (150821), 141334 states have internal predecessors, (150821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141335 states to 141335 states and 150821 transitions. [2021-12-17 04:36:45,472 INFO L78 Accepts]: Start accepts. Automaton has 141335 states and 150821 transitions. Word has length 436 [2021-12-17 04:36:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:45,472 INFO L470 AbstractCegarLoop]: Abstraction has 141335 states and 150821 transitions. [2021-12-17 04:36:45,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 141335 states and 150821 transitions. [2021-12-17 04:36:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-17 04:36:45,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:45,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:45,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:36:45,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1491344447, now seen corresponding path program 1 times [2021-12-17 04:36:45,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:45,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699463303] [2021-12-17 04:36:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 320 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:36:45,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699463303] [2021-12-17 04:36:45,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699463303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:36:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570905338] [2021-12-17 04:36:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:45,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:36:45,697 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) [2021-12-17 04:36:45,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:36:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:36:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:36:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 04:36:46,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:36:46,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570905338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:46,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:36:46,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:36:46,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643430859] [2021-12-17 04:36:46,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:46,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:46,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:36:46,768 INFO L87 Difference]: Start difference. First operand 141335 states and 150821 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:50,211 INFO L93 Difference]: Finished difference Result 283459 states and 302438 transitions. [2021-12-17 04:36:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 458 [2021-12-17 04:36:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:50,397 INFO L225 Difference]: With dead ends: 283459 [2021-12-17 04:36:50,398 INFO L226 Difference]: Without dead ends: 142913 [2021-12-17 04:36:50,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:36:50,467 INFO L933 BasicCegarLoop]: 1399 mSDtfsCounter, 996 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:50,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1485 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142913 states. [2021-12-17 04:36:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142913 to 139750. [2021-12-17 04:36:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139750 states, 139749 states have (on average 1.055699861895255) internal successors, (147533), 139749 states have internal predecessors, (147533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139750 states to 139750 states and 147533 transitions. [2021-12-17 04:36:52,303 INFO L78 Accepts]: Start accepts. Automaton has 139750 states and 147533 transitions. Word has length 458 [2021-12-17 04:36:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:52,303 INFO L470 AbstractCegarLoop]: Abstraction has 139750 states and 147533 transitions. [2021-12-17 04:36:52,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 139750 states and 147533 transitions. [2021-12-17 04:36:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-17 04:36:52,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:52,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:52,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 04:36:52,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 04:36:52,525 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:52,526 INFO L85 PathProgramCache]: Analyzing trace with hash -609224798, now seen corresponding path program 1 times [2021-12-17 04:36:52,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:52,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137712791] [2021-12-17 04:36:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:52,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 04:36:52,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:52,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137712791] [2021-12-17 04:36:52,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137712791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:52,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:52,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:52,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145754872] [2021-12-17 04:36:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:52,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:52,656 INFO L87 Difference]: Start difference. First operand 139750 states and 147533 transitions. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:57,334 INFO L93 Difference]: Finished difference Result 335526 states and 354918 transitions. [2021-12-17 04:36:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 511 [2021-12-17 04:36:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:57,590 INFO L225 Difference]: With dead ends: 335526 [2021-12-17 04:36:57,590 INFO L226 Difference]: Without dead ends: 195777 [2021-12-17 04:36:57,651 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 [2021-12-17 04:36:57,652 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 841 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2985 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:57,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 795 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2985 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:36:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195777 states. [2021-12-17 04:36:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195777 to 161010. [2021-12-17 04:36:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161010 states, 161009 states have (on average 1.0549907148047624) internal successors, (169863), 161009 states have internal predecessors, (169863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161010 states to 161010 states and 169863 transitions. [2021-12-17 04:36:59,976 INFO L78 Accepts]: Start accepts. Automaton has 161010 states and 169863 transitions. Word has length 511 [2021-12-17 04:36:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:59,976 INFO L470 AbstractCegarLoop]: Abstraction has 161010 states and 169863 transitions. [2021-12-17 04:36:59,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 161010 states and 169863 transitions. [2021-12-17 04:36:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-17 04:36:59,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:59,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:59,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:36:59,990 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2134989485, now seen corresponding path program 1 times [2021-12-17 04:36:59,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:59,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066985277] [2021-12-17 04:36:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:59,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:37:00,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066985277] [2021-12-17 04:37:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066985277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:00,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:00,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:00,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565205850] [2021-12-17 04:37:00,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:00,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:00,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:00,142 INFO L87 Difference]: Start difference. First operand 161010 states and 169863 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:03,954 INFO L93 Difference]: Finished difference Result 354291 states and 375273 transitions. [2021-12-17 04:37:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 520 [2021-12-17 04:37:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:04,608 INFO L225 Difference]: With dead ends: 354291 [2021-12-17 04:37:04,608 INFO L226 Difference]: Without dead ends: 194857 [2021-12-17 04:37:04,707 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 [2021-12-17 04:37:04,709 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 876 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:04,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 750 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:37:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194857 states. [2021-12-17 04:37:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194857 to 193264. [2021-12-17 04:37:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193264 states, 193263 states have (on average 1.0537505885761889) internal successors, (203651), 193263 states have internal predecessors, (203651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193264 states to 193264 states and 203651 transitions. [2021-12-17 04:37:07,320 INFO L78 Accepts]: Start accepts. Automaton has 193264 states and 203651 transitions. Word has length 520 [2021-12-17 04:37:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 193264 states and 203651 transitions. [2021-12-17 04:37:07,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 193264 states and 203651 transitions. [2021-12-17 04:37:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-17 04:37:07,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:07,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:07,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:37:07,334 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -981061782, now seen corresponding path program 1 times [2021-12-17 04:37:07,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623234800] [2021-12-17 04:37:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:07,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 320 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:37:07,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623234800] [2021-12-17 04:37:07,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623234800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:37:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768528304] [2021-12-17 04:37:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:07,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:07,554 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) [2021-12-17 04:37:07,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:37:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:37:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:37:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 04:37:08,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:37:08,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768528304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:08,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:37:08,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:37:08,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549308083] [2021-12-17 04:37:08,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:08,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:08,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:08,856 INFO L87 Difference]: Start difference. First operand 193264 states and 203651 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:12,753 INFO L93 Difference]: Finished difference Result 370793 states and 391209 transitions. [2021-12-17 04:37:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 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 533 [2021-12-17 04:37:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:13,043 INFO L225 Difference]: With dead ends: 370793 [2021-12-17 04:37:13,044 INFO L226 Difference]: Without dead ends: 195633 [2021-12-17 04:37:13,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:13,150 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 683 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:13,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 1151 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:37:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195633 states. [2021-12-17 04:37:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195633 to 193261. [2021-12-17 04:37:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193261 states, 193260 states have (on average 1.0496015730104522) internal successors, (202846), 193260 states have internal predecessors, (202846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193261 states to 193261 states and 202846 transitions. [2021-12-17 04:37:15,821 INFO L78 Accepts]: Start accepts. Automaton has 193261 states and 202846 transitions. Word has length 533 [2021-12-17 04:37:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:15,821 INFO L470 AbstractCegarLoop]: Abstraction has 193261 states and 202846 transitions. [2021-12-17 04:37:15,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 193261 states and 202846 transitions. [2021-12-17 04:37:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-17 04:37:15,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:15,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:15,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:37:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:16,043 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -238806934, now seen corresponding path program 1 times [2021-12-17 04:37:16,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:16,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525546371] [2021-12-17 04:37:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:16,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 601 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 04:37:16,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525546371] [2021-12-17 04:37:16,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525546371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:16,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:16,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:16,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677656268] [2021-12-17 04:37:16,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:16,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:16,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:16,194 INFO L87 Difference]: Start difference. First operand 193261 states and 202846 transitions. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:19,763 INFO L93 Difference]: Finished difference Result 368435 states and 387202 transitions. [2021-12-17 04:37:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:19,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 593 [2021-12-17 04:37:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:19,997 INFO L225 Difference]: With dead ends: 368435 [2021-12-17 04:37:19,997 INFO L226 Difference]: Without dead ends: 193276 [2021-12-17 04:37:20,077 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 [2021-12-17 04:37:20,078 INFO L933 BasicCegarLoop]: 1676 mSDtfsCounter, 769 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:20,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1815 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:37:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193276 states.