./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b4e579e156345915e1fde26fcd53bce80a36e2067cd5c9341971cdf8691491e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:08:25,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:08:25,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:08:25,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:08:25,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:08:25,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:08:25,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:08:25,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:08:25,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:08:25,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:08:25,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:08:25,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:08:25,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:08:25,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:08:25,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:08:25,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:08:25,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:08:25,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:08:25,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:08:25,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:08:25,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:08:25,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:08:25,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:08:25,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:08:25,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:08:25,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:08:25,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:08:25,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:08:25,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:08:25,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:08:25,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:08:25,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:08:25,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:08:25,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:08:25,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:08:25,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:08:25,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:08:25,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:08:25,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:08:25,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:08:25,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:08:25,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:08:25,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:08:25,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:08:25,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:08:25,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:08:25,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:08:25,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:08:25,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:08:25,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:08:25,839 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:08:25,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:08:25,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:08:25,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:08:25,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:08:25,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:08:25,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:08:25,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:08:25,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:08:25,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:08:25,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:08:25,843 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:08:25,843 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:08:25,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:08:25,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:08:25,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4e579e156345915e1fde26fcd53bce80a36e2067cd5c9341971cdf8691491e [2021-12-14 15:08:26,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:08:26,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:08:26,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:08:26,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:08:26,054 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:08:26,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:08:26,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf584107f/5fd7687e70fc47f1bf10f9b01f1bec02/FLAGef89483a2 [2021-12-14 15:08:26,457 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:08:26,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:08:26,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf584107f/5fd7687e70fc47f1bf10f9b01f1bec02/FLAGef89483a2 [2021-12-14 15:08:26,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf584107f/5fd7687e70fc47f1bf10f9b01f1bec02 [2021-12-14 15:08:26,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:08:26,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:08:26,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:08:26,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:08:26,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:08:26,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:26" (1/1) ... [2021-12-14 15:08:26,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6249f3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:26, skipping insertion in model container [2021-12-14 15:08:26,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:26" (1/1) ... [2021-12-14 15:08:26,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:08:26,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:08:27,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2021-12-14 15:08:27,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:08:27,157 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:08:27,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2021-12-14 15:08:27,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:08:27,267 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:08:27,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27 WrapperNode [2021-12-14 15:08:27,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:08:27,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:08:27,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:08:27,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:08:27,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,326 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1256 [2021-12-14 15:08:27,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:08:27,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:08:27,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:08:27,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:08:27,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:08:27,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:08:27,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:08:27,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:08:27,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (1/1) ... [2021-12-14 15:08:27,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:08:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:08:27,415 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) [2021-12-14 15:08:27,437 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 [2021-12-14 15:08:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:08:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:08:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:08:27,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:08:27,587 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:08:27,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:08:28,150 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:08:28,167 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:08:28,167 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:08:28,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:28 BoogieIcfgContainer [2021-12-14 15:08:28,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:08:28,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:08:28,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:08:28,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:08:28,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:08:26" (1/3) ... [2021-12-14 15:08:28,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d355204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:28, skipping insertion in model container [2021-12-14 15:08:28,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:27" (2/3) ... [2021-12-14 15:08:28,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d355204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:28, skipping insertion in model container [2021-12-14 15:08:28,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:28" (3/3) ... [2021-12-14 15:08:28,182 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:08:28,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:08:28,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:08:28,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:08:28,223 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 [2021-12-14 15:08:28,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:08:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 1.79672131147541) internal successors, (548), 306 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 15:08:28,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:28,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:28,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 103029560, now seen corresponding path program 1 times [2021-12-14 15:08:28,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149540592] [2021-12-14 15:08:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:28,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:28,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149540592] [2021-12-14 15:08:28,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149540592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:28,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:28,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:28,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836502859] [2021-12-14 15:08:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:28,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:28,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:28,577 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 1.79672131147541) internal successors, (548), 306 states have internal predecessors, (548), 0 states have call successors, (0), 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 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:28,684 INFO L93 Difference]: Finished difference Result 556 states and 967 transitions. [2021-12-14 15:08:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-14 15:08:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:28,701 INFO L225 Difference]: With dead ends: 556 [2021-12-14 15:08:28,701 INFO L226 Difference]: Without dead ends: 420 [2021-12-14 15:08:28,704 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 [2021-12-14 15:08:28,706 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 210 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:28,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1038 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-14 15:08:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2021-12-14 15:08:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.683453237410072) internal successors, (702), 417 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 702 transitions. [2021-12-14 15:08:28,770 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 702 transitions. Word has length 99 [2021-12-14 15:08:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:28,771 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 702 transitions. [2021-12-14 15:08:28,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 702 transitions. [2021-12-14 15:08:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:08:28,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:28,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:28,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:08:28,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1521112466, now seen corresponding path program 1 times [2021-12-14 15:08:28,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:28,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924788835] [2021-12-14 15:08:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:28,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924788835] [2021-12-14 15:08:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924788835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:28,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:28,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:28,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253963694] [2021-12-14 15:08:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:28,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:28,869 INFO L87 Difference]: Start difference. First operand 418 states and 702 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:28,908 INFO L93 Difference]: Finished difference Result 882 states and 1478 transitions. [2021-12-14 15:08:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-12-14 15:08:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:28,912 INFO L225 Difference]: With dead ends: 882 [2021-12-14 15:08:28,912 INFO L226 Difference]: Without dead ends: 641 [2021-12-14 15:08:28,913 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 [2021-12-14 15:08:28,914 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 189 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:28,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 997 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-14 15:08:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2021-12-14 15:08:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.677115987460815) internal successors, (1070), 638 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1070 transitions. [2021-12-14 15:08:28,989 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1070 transitions. Word has length 102 [2021-12-14 15:08:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:28,989 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1070 transitions. [2021-12-14 15:08:28,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1070 transitions. [2021-12-14 15:08:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 15:08:28,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:28,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:28,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:08:28,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2035930850, now seen corresponding path program 1 times [2021-12-14 15:08:28,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:28,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497701076] [2021-12-14 15:08:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:28,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:29,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497701076] [2021-12-14 15:08:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497701076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:29,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:29,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040023283] [2021-12-14 15:08:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:29,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:29,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:29,122 INFO L87 Difference]: Start difference. First operand 639 states and 1070 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:29,154 INFO L93 Difference]: Finished difference Result 1527 states and 2548 transitions. [2021-12-14 15:08:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-14 15:08:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:29,158 INFO L225 Difference]: With dead ends: 1527 [2021-12-14 15:08:29,159 INFO L226 Difference]: Without dead ends: 1065 [2021-12-14 15:08:29,161 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 [2021-12-14 15:08:29,162 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 183 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:29,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1077 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-12-14 15:08:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1063. [2021-12-14 15:08:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 1.6666666666666667) internal successors, (1770), 1062 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1770 transitions. [2021-12-14 15:08:29,192 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1770 transitions. Word has length 105 [2021-12-14 15:08:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:29,193 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1770 transitions. [2021-12-14 15:08:29,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1770 transitions. [2021-12-14 15:08:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 15:08:29,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:29,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:08:29,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 467943166, now seen corresponding path program 1 times [2021-12-14 15:08:29,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:29,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301950715] [2021-12-14 15:08:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:29,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:29,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301950715] [2021-12-14 15:08:29,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301950715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:29,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:29,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:29,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016091423] [2021-12-14 15:08:29,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:29,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:29,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:29,302 INFO L87 Difference]: Start difference. First operand 1063 states and 1770 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:29,360 INFO L93 Difference]: Finished difference Result 1969 states and 3284 transitions. [2021-12-14 15:08:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-14 15:08:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:29,367 INFO L225 Difference]: With dead ends: 1969 [2021-12-14 15:08:29,367 INFO L226 Difference]: Without dead ends: 1507 [2021-12-14 15:08:29,370 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 [2021-12-14 15:08:29,372 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 184 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:29,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1069 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-12-14 15:08:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2021-12-14 15:08:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.663563829787234) internal successors, (2502), 1504 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2502 transitions. [2021-12-14 15:08:29,415 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2502 transitions. Word has length 108 [2021-12-14 15:08:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:29,415 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 2502 transitions. [2021-12-14 15:08:29,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2502 transitions. [2021-12-14 15:08:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 15:08:29,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:29,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:29,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:08:29,418 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -315451476, now seen corresponding path program 1 times [2021-12-14 15:08:29,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:29,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139748269] [2021-12-14 15:08:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:29,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:29,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139748269] [2021-12-14 15:08:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139748269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:29,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:29,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:29,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952926997] [2021-12-14 15:08:29,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:29,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:29,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:29,509 INFO L87 Difference]: Start difference. First operand 1505 states and 2502 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:29,572 INFO L93 Difference]: Finished difference Result 3881 states and 6428 transitions. [2021-12-14 15:08:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-14 15:08:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:29,582 INFO L225 Difference]: With dead ends: 3881 [2021-12-14 15:08:29,582 INFO L226 Difference]: Without dead ends: 2639 [2021-12-14 15:08:29,584 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 [2021-12-14 15:08:29,590 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 177 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:29,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1051 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-12-14 15:08:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2637. [2021-12-14 15:08:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.650227617602428) internal successors, (4350), 2636 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 4350 transitions. [2021-12-14 15:08:29,659 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 4350 transitions. Word has length 108 [2021-12-14 15:08:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:29,660 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 4350 transitions. [2021-12-14 15:08:29,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 4350 transitions. [2021-12-14 15:08:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 15:08:29,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:29,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:29,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:08:29,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 933596114, now seen corresponding path program 1 times [2021-12-14 15:08:29,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723346556] [2021-12-14 15:08:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:29,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:29,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:29,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723346556] [2021-12-14 15:08:29,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723346556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:29,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:29,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:29,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107174476] [2021-12-14 15:08:29,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:29,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:29,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:29,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:29,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:29,736 INFO L87 Difference]: Start difference. First operand 2637 states and 4350 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:29,820 INFO L93 Difference]: Finished difference Result 4881 states and 8064 transitions. [2021-12-14 15:08:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-14 15:08:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:29,832 INFO L225 Difference]: With dead ends: 4881 [2021-12-14 15:08:29,832 INFO L226 Difference]: Without dead ends: 3639 [2021-12-14 15:08:29,835 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 [2021-12-14 15:08:29,837 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 178 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:29,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1042 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-12-14 15:08:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3637. [2021-12-14 15:08:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 1.6452145214521452) internal successors, (5982), 3636 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 5982 transitions. [2021-12-14 15:08:29,981 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 5982 transitions. Word has length 111 [2021-12-14 15:08:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:29,981 INFO L470 AbstractCegarLoop]: Abstraction has 3637 states and 5982 transitions. [2021-12-14 15:08:29,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 5982 transitions. [2021-12-14 15:08:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 15:08:29,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:29,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:29,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:08:29,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1374875396, now seen corresponding path program 1 times [2021-12-14 15:08:29,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:29,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386938500] [2021-12-14 15:08:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:29,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:30,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:30,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386938500] [2021-12-14 15:08:30,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386938500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:30,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:30,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:08:30,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441121445] [2021-12-14 15:08:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:30,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:08:30,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:08:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:08:30,061 INFO L87 Difference]: Start difference. First operand 3637 states and 5982 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:30,687 INFO L93 Difference]: Finished difference Result 20391 states and 33849 transitions. [2021-12-14 15:08:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 15:08:30,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-14 15:08:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:30,754 INFO L225 Difference]: With dead ends: 20391 [2021-12-14 15:08:30,754 INFO L226 Difference]: Without dead ends: 17089 [2021-12-14 15:08:30,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:08:30,765 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1812 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 4435 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:30,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 4435 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:08:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17089 states. [2021-12-14 15:08:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17089 to 6868. [2021-12-14 15:08:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6868 states, 6867 states have (on average 1.6419105868647152) internal successors, (11275), 6867 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6868 states to 6868 states and 11275 transitions. [2021-12-14 15:08:31,148 INFO L78 Accepts]: Start accepts. Automaton has 6868 states and 11275 transitions. Word has length 111 [2021-12-14 15:08:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 6868 states and 11275 transitions. [2021-12-14 15:08:31,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6868 states and 11275 transitions. [2021-12-14 15:08:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 15:08:31,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:31,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:31,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:08:31,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash -395597751, now seen corresponding path program 1 times [2021-12-14 15:08:31,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:31,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760038472] [2021-12-14 15:08:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:31,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:31,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760038472] [2021-12-14 15:08:31,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760038472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:31,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:31,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:08:31,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030389695] [2021-12-14 15:08:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:31,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:08:31,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:08:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:08:31,207 INFO L87 Difference]: Start difference. First operand 6868 states and 11275 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:31,684 INFO L93 Difference]: Finished difference Result 20225 states and 33450 transitions. [2021-12-14 15:08:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:08:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-14 15:08:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:31,713 INFO L225 Difference]: With dead ends: 20225 [2021-12-14 15:08:31,713 INFO L226 Difference]: Without dead ends: 13778 [2021-12-14 15:08:31,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:08:31,726 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 624 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:31,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1721 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:08:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2021-12-14 15:08:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 10319. [2021-12-14 15:08:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 1.6449893390191899) internal successors, (16973), 10318 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 16973 transitions. [2021-12-14 15:08:32,176 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 16973 transitions. Word has length 112 [2021-12-14 15:08:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:32,176 INFO L470 AbstractCegarLoop]: Abstraction has 10319 states and 16973 transitions. [2021-12-14 15:08:32,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 16973 transitions. [2021-12-14 15:08:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 15:08:32,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:32,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:32,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:08:32,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash 454247534, now seen corresponding path program 1 times [2021-12-14 15:08:32,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:32,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672330191] [2021-12-14 15:08:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:32,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672330191] [2021-12-14 15:08:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672330191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:32,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:32,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:32,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6001682] [2021-12-14 15:08:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:32,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:32,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:32,232 INFO L87 Difference]: Start difference. First operand 10319 states and 16973 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:32,692 INFO L93 Difference]: Finished difference Result 19395 states and 32023 transitions. [2021-12-14 15:08:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-14 15:08:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:32,721 INFO L225 Difference]: With dead ends: 19395 [2021-12-14 15:08:32,721 INFO L226 Difference]: Without dead ends: 14003 [2021-12-14 15:08:32,732 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 [2021-12-14 15:08:32,733 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 190 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:32,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1113 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2021-12-14 15:08:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 14001. [2021-12-14 15:08:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14001 states, 14000 states have (on average 1.6437857142857142) internal successors, (23013), 14000 states have internal predecessors, (23013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14001 states to 14001 states and 23013 transitions. [2021-12-14 15:08:33,211 INFO L78 Accepts]: Start accepts. Automaton has 14001 states and 23013 transitions. Word has length 112 [2021-12-14 15:08:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:33,211 INFO L470 AbstractCegarLoop]: Abstraction has 14001 states and 23013 transitions. [2021-12-14 15:08:33,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14001 states and 23013 transitions. [2021-12-14 15:08:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 15:08:33,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:33,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:33,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:08:33,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1896648670, now seen corresponding path program 1 times [2021-12-14 15:08:33,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042566419] [2021-12-14 15:08:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:33,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:33,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:33,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042566419] [2021-12-14 15:08:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042566419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:33,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:33,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:08:33,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115172459] [2021-12-14 15:08:33,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:08:33,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:08:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:08:33,270 INFO L87 Difference]: Start difference. First operand 14001 states and 23013 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:33,902 INFO L93 Difference]: Finished difference Result 30414 states and 50389 transitions. [2021-12-14 15:08:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:08:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-14 15:08:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:33,947 INFO L225 Difference]: With dead ends: 30414 [2021-12-14 15:08:33,947 INFO L226 Difference]: Without dead ends: 20721 [2021-12-14 15:08:33,962 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 [2021-12-14 15:08:33,963 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 196 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:33,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1148 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2021-12-14 15:08:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20719. [2021-12-14 15:08:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 1.6462496379959455) internal successors, (34107), 20718 states have internal predecessors, (34107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 34107 transitions. [2021-12-14 15:08:34,767 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 34107 transitions. Word has length 112 [2021-12-14 15:08:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 20719 states and 34107 transitions. [2021-12-14 15:08:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 34107 transitions. [2021-12-14 15:08:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 15:08:34,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:34,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:34,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:08:34,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 558867563, now seen corresponding path program 1 times [2021-12-14 15:08:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:34,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648050734] [2021-12-14 15:08:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:34,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:34,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648050734] [2021-12-14 15:08:34,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648050734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:34,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:34,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:08:34,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207492481] [2021-12-14 15:08:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:34,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:08:34,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:08:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:08:34,817 INFO L87 Difference]: Start difference. First operand 20719 states and 34107 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:36,126 INFO L93 Difference]: Finished difference Result 67417 states and 111246 transitions. [2021-12-14 15:08:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:08:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-14 15:08:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:36,223 INFO L225 Difference]: With dead ends: 67417 [2021-12-14 15:08:36,224 INFO L226 Difference]: Without dead ends: 46931 [2021-12-14 15:08:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:08:36,262 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 622 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:36,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1575 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46931 states. [2021-12-14 15:08:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46931 to 33736. [2021-12-14 15:08:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33736 states, 33735 states have (on average 1.6415295686971987) internal successors, (55377), 33735 states have internal predecessors, (55377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33736 states to 33736 states and 55377 transitions. [2021-12-14 15:08:37,675 INFO L78 Accepts]: Start accepts. Automaton has 33736 states and 55377 transitions. Word has length 113 [2021-12-14 15:08:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:37,676 INFO L470 AbstractCegarLoop]: Abstraction has 33736 states and 55377 transitions. [2021-12-14 15:08:37,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33736 states and 55377 transitions. [2021-12-14 15:08:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 15:08:37,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:37,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:37,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:08:37,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 87079248, now seen corresponding path program 1 times [2021-12-14 15:08:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:37,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888727604] [2021-12-14 15:08:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:37,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888727604] [2021-12-14 15:08:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888727604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:37,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:37,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:08:37,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198995173] [2021-12-14 15:08:37,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:37,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:08:37,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:08:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:08:37,728 INFO L87 Difference]: Start difference. First operand 33736 states and 55377 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:40,303 INFO L93 Difference]: Finished difference Result 109311 states and 179862 transitions. [2021-12-14 15:08:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:08:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-14 15:08:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:40,641 INFO L225 Difference]: With dead ends: 109311 [2021-12-14 15:08:40,641 INFO L226 Difference]: Without dead ends: 75808 [2021-12-14 15:08:40,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:08:40,690 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 620 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:40,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1622 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75808 states. [2021-12-14 15:08:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75808 to 54629. [2021-12-14 15:08:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54629 states, 54628 states have (on average 1.6367979790583584) internal successors, (89415), 54628 states have internal predecessors, (89415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54629 states to 54629 states and 89415 transitions. [2021-12-14 15:08:43,224 INFO L78 Accepts]: Start accepts. Automaton has 54629 states and 89415 transitions. Word has length 114 [2021-12-14 15:08:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 54629 states and 89415 transitions. [2021-12-14 15:08:43,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 54629 states and 89415 transitions. [2021-12-14 15:08:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 15:08:43,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:43,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:08:43,227 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1648898606, now seen corresponding path program 1 times [2021-12-14 15:08:43,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153432411] [2021-12-14 15:08:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:43,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:43,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153432411] [2021-12-14 15:08:43,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153432411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:43,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:43,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:08:43,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755897478] [2021-12-14 15:08:43,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:43,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:08:43,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:43,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:08:43,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:08:43,274 INFO L87 Difference]: Start difference. First operand 54629 states and 89415 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:47,869 INFO L93 Difference]: Finished difference Result 175037 states and 287174 transitions. [2021-12-14 15:08:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:08:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-12-14 15:08:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:48,138 INFO L225 Difference]: With dead ends: 175037 [2021-12-14 15:08:48,138 INFO L226 Difference]: Without dead ends: 120641 [2021-12-14 15:08:48,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:08:48,212 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 618 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:48,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1687 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120641 states. [2021-12-14 15:08:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120641 to 87410. [2021-12-14 15:08:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87410 states, 87409 states have (on average 1.6321088217460444) internal successors, (142661), 87409 states have internal predecessors, (142661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87410 states to 87410 states and 142661 transitions. [2021-12-14 15:08:52,501 INFO L78 Accepts]: Start accepts. Automaton has 87410 states and 142661 transitions. Word has length 115 [2021-12-14 15:08:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:08:52,501 INFO L470 AbstractCegarLoop]: Abstraction has 87410 states and 142661 transitions. [2021-12-14 15:08:52,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 87410 states and 142661 transitions. [2021-12-14 15:08:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 15:08:52,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:08:52,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:08:52,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:08:52,502 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:08:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:08:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1265934813, now seen corresponding path program 1 times [2021-12-14 15:08:52,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:08:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315141643] [2021-12-14 15:08:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:08:52,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:08:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:08:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:08:52,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:08:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315141643] [2021-12-14 15:08:52,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315141643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:08:52,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:08:52,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:08:52,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105136982] [2021-12-14 15:08:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:08:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:08:52,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:08:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:08:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:08:52,649 INFO L87 Difference]: Start difference. First operand 87410 states and 142661 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:08:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:08:56,737 INFO L93 Difference]: Finished difference Result 174589 states and 284943 transitions. [2021-12-14 15:08:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:08:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-14 15:08:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:08:56,942 INFO L225 Difference]: With dead ends: 174589 [2021-12-14 15:08:56,942 INFO L226 Difference]: Without dead ends: 87412 [2021-12-14 15:08:57,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:08:57,013 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 837 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:08:57,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1945 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:08:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87412 states. [2021-12-14 15:09:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87412 to 87410. [2021-12-14 15:09:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87410 states, 87409 states have (on average 1.6249585282980012) internal successors, (142036), 87409 states have internal predecessors, (142036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:09:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87410 states to 87410 states and 142036 transitions. [2021-12-14 15:09:01,082 INFO L78 Accepts]: Start accepts. Automaton has 87410 states and 142036 transitions. Word has length 117 [2021-12-14 15:09:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:09:01,082 INFO L470 AbstractCegarLoop]: Abstraction has 87410 states and 142036 transitions. [2021-12-14 15:09:01,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:09:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 87410 states and 142036 transitions. [2021-12-14 15:09:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 15:09:01,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:09:01,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:09:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:09:01,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:09:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:09:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1404593150, now seen corresponding path program 1 times [2021-12-14 15:09:01,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:09:01,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322199662] [2021-12-14 15:09:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:09:01,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:09:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:09:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:09:01,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:09:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322199662] [2021-12-14 15:09:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322199662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:09:01,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:09:01,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:09:01,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990859271] [2021-12-14 15:09:01,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:09:01,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:09:01,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:09:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:09:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:09:01,180 INFO L87 Difference]: Start difference. First operand 87410 states and 142036 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)