./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.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/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.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 e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:58:16,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:58:16,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:58:16,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:58:16,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:58:16,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:58:16,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:58:16,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:58:16,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:58:16,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:58:16,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:58:16,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:58:16,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:58:16,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:58:16,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:58:16,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:58:16,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:58:16,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:58:16,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:58:16,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:58:16,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:58:16,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:58:16,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:58:16,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:58:16,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:58:16,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:58:16,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:58:16,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:58:16,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:58:16,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:58:16,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:58:16,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:58:16,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:58:16,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:58:16,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:58:16,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:58:16,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:58:16,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:58:16,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:58:16,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:58:16,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:58:16,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:58:16,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:58:16,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:58:16,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:58:16,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:58:16,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:58:16,914 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:58:16,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:58:16,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:58:16,915 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:58:16,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:58:16,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:58:16,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:58:16,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:58:16,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:58:16,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:58:16,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:58:16,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:58:16,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:58:16,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:58:16,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:58:16,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:58:16,919 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:58:16,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:58:16,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:58:16,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 [2021-12-14 14:58:17,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:58:17,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:58:17,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:58:17,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:58:17,149 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:58:17,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-14 14:58:17,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/456f1aa2b/e8a2553a4b3c4de3afa0bd090c888aa3/FLAG86297cbea [2021-12-14 14:58:17,600 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:58:17,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-14 14:58:17,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/456f1aa2b/e8a2553a4b3c4de3afa0bd090c888aa3/FLAG86297cbea [2021-12-14 14:58:17,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/456f1aa2b/e8a2553a4b3c4de3afa0bd090c888aa3 [2021-12-14 14:58:17,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:58:17,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:58:17,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:58:17,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:58:17,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:58:17,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143a5682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17, skipping insertion in model container [2021-12-14 14:58:17,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:58:17,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:58:17,821 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/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-12-14 14:58:17,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:58:17,828 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:58:17,853 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/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-12-14 14:58:17,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:58:17,863 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:58:17,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17 WrapperNode [2021-12-14 14:58:17,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:58:17,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:58:17,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:58:17,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:58:17,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,898 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 252 [2021-12-14 14:58:17,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:58:17,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:58:17,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:58:17,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:58:17,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:58:17,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:58:17,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:58:17,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:58:17,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (1/1) ... [2021-12-14 14:58:17,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:58:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:58:17,965 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 14:58:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:58:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:58:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:58:17,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:58:17,981 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 14:58:18,061 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:58:18,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:58:18,340 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:58:18,345 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:58:18,345 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:58:18,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:58:18 BoogieIcfgContainer [2021-12-14 14:58:18,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:58:18,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:58:18,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:58:18,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:58:18,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:58:17" (1/3) ... [2021-12-14 14:58:18,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655631a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:58:18, skipping insertion in model container [2021-12-14 14:58:18,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:58:17" (2/3) ... [2021-12-14 14:58:18,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655631a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:58:18, skipping insertion in model container [2021-12-14 14:58:18,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:58:18" (3/3) ... [2021-12-14 14:58:18,357 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-14 14:58:18,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:58:18,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:58:18,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:58:18,401 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 14:58:18,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:58:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 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 14:58:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 14:58:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:18,428 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] [2021-12-14 14:58:18,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2021-12-14 14:58:18,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077381575] [2021-12-14 14:58:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:18,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:18,633 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 14:58:18,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077381575] [2021-12-14 14:58:18,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077381575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:18,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:18,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:18,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671953699] [2021-12-14 14:58:18,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:18,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:18,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:18,666 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:58:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:18,745 INFO L93 Difference]: Finished difference Result 139 states and 225 transitions. [2021-12-14 14:58:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 14:58:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:18,753 INFO L225 Difference]: With dead ends: 139 [2021-12-14 14:58:18,753 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 14:58:18,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:58:18,758 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:18,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 14:58:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-14 14:58:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 76 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 14:58:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2021-12-14 14:58:18,797 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 26 [2021-12-14 14:58:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:18,797 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2021-12-14 14:58:18,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:58:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2021-12-14 14:58:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 14:58:18,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:18,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:18,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:58:18,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2021-12-14 14:58:18,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898758705] [2021-12-14 14:58:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:18,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:18,905 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 14:58:18,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:18,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898758705] [2021-12-14 14:58:18,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898758705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:18,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:18,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:18,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437223975] [2021-12-14 14:58:18,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:18,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:18,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:18,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:18,910 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:18,942 INFO L93 Difference]: Finished difference Result 173 states and 258 transitions. [2021-12-14 14:58:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-14 14:58:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:18,944 INFO L225 Difference]: With dead ends: 173 [2021-12-14 14:58:18,946 INFO L226 Difference]: Without dead ends: 119 [2021-12-14 14:58:18,946 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 14:58:18,947 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 223 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 14:58:18,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 223 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-14 14:58:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-14 14:58:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 0 states have call successors, (0), 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 14:58:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2021-12-14 14:58:18,965 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 42 [2021-12-14 14:58:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:18,966 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2021-12-14 14:58:18,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2021-12-14 14:58:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 14:58:18,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:18,971 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] [2021-12-14 14:58:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:58:18,975 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2021-12-14 14:58:18,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661987295] [2021-12-14 14:58:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:18,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,036 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 14:58:19,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661987295] [2021-12-14 14:58:19,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661987295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:19,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024935193] [2021-12-14 14:58:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:19,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:19,039 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 14:58:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:19,053 INFO L93 Difference]: Finished difference Result 281 states and 427 transitions. [2021-12-14 14:58:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 14:58:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:19,055 INFO L225 Difference]: With dead ends: 281 [2021-12-14 14:58:19,055 INFO L226 Difference]: Without dead ends: 187 [2021-12-14 14:58:19,055 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 14:58:19,056 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 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 14:58:19,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-14 14:58:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-12-14 14:58:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5) internal successors, (276), 184 states have internal predecessors, (276), 0 states have call successors, (0), 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 14:58:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2021-12-14 14:58:19,070 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 43 [2021-12-14 14:58:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2021-12-14 14:58:19,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 14:58:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2021-12-14 14:58:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 14:58:19,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:19,072 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] [2021-12-14 14:58:19,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:58:19,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2021-12-14 14:58:19,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:19,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637964742] [2021-12-14 14:58:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:19,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,147 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 14:58:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637964742] [2021-12-14 14:58:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637964742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:19,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386123156] [2021-12-14 14:58:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:19,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:19,149 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:58:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:19,226 INFO L93 Difference]: Finished difference Result 833 states and 1288 transitions. [2021-12-14 14:58:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-14 14:58:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:19,233 INFO L225 Difference]: With dead ends: 833 [2021-12-14 14:58:19,233 INFO L226 Difference]: Without dead ends: 671 [2021-12-14 14:58:19,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:58:19,235 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 427 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:19,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 588 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-14 14:58:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 345. [2021-12-14 14:58:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.5116279069767442) internal successors, (520), 344 states have internal predecessors, (520), 0 states have call successors, (0), 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 14:58:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 520 transitions. [2021-12-14 14:58:19,264 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 520 transitions. Word has length 44 [2021-12-14 14:58:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:19,264 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 520 transitions. [2021-12-14 14:58:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:58:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 520 transitions. [2021-12-14 14:58:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 14:58:19,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:19,265 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] [2021-12-14 14:58:19,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:58:19,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -829863502, now seen corresponding path program 1 times [2021-12-14 14:58:19,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536249808] [2021-12-14 14:58:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:19,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,328 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 14:58:19,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536249808] [2021-12-14 14:58:19,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536249808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:19,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763812522] [2021-12-14 14:58:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:19,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:19,331 INFO L87 Difference]: Start difference. First operand 345 states and 520 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:58:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:19,381 INFO L93 Difference]: Finished difference Result 1215 states and 1847 transitions. [2021-12-14 14:58:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-14 14:58:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:19,388 INFO L225 Difference]: With dead ends: 1215 [2021-12-14 14:58:19,388 INFO L226 Difference]: Without dead ends: 893 [2021-12-14 14:58:19,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:19,390 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 248 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:19,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 364 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-14 14:58:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 889. [2021-12-14 14:58:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.509009009009009) internal successors, (1340), 888 states have internal predecessors, (1340), 0 states have call successors, (0), 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 14:58:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1340 transitions. [2021-12-14 14:58:19,430 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1340 transitions. Word has length 45 [2021-12-14 14:58:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:19,430 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1340 transitions. [2021-12-14 14:58:19,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:58:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1340 transitions. [2021-12-14 14:58:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 14:58:19,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:19,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:19,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:58:19,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1485202410, now seen corresponding path program 1 times [2021-12-14 14:58:19,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:19,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787154751] [2021-12-14 14:58:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:19,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,458 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 14:58:19,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787154751] [2021-12-14 14:58:19,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787154751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:19,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325881696] [2021-12-14 14:58:19,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:19,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:19,460 INFO L87 Difference]: Start difference. First operand 889 states and 1340 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:19,493 INFO L93 Difference]: Finished difference Result 2309 states and 3462 transitions. [2021-12-14 14:58:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-14 14:58:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:19,497 INFO L225 Difference]: With dead ends: 2309 [2021-12-14 14:58:19,497 INFO L226 Difference]: Without dead ends: 1443 [2021-12-14 14:58:19,498 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 14:58:19,498 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 242 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 14:58:19,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-12-14 14:58:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1441. [2021-12-14 14:58:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 1.4722222222222223) internal successors, (2120), 1440 states have internal predecessors, (2120), 0 states have call successors, (0), 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 14:58:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2120 transitions. [2021-12-14 14:58:19,551 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2120 transitions. Word has length 46 [2021-12-14 14:58:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:19,552 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2120 transitions. [2021-12-14 14:58:19,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2120 transitions. [2021-12-14 14:58:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 14:58:19,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:19,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:19,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:58:19,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2021-12-14 14:58:19,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270841424] [2021-12-14 14:58:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:19,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,626 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 14:58:19,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270841424] [2021-12-14 14:58:19,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270841424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:58:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238072440] [2021-12-14 14:58:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:58:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:58:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:58:19,629 INFO L87 Difference]: Start difference. First operand 1441 states and 2120 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:19,808 INFO L93 Difference]: Finished difference Result 3051 states and 4409 transitions. [2021-12-14 14:58:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:58:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-14 14:58:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:19,817 INFO L225 Difference]: With dead ends: 3051 [2021-12-14 14:58:19,818 INFO L226 Difference]: Without dead ends: 3049 [2021-12-14 14:58:19,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:58:19,821 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 615 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 509 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-12-14 14:58:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1585. [2021-12-14 14:58:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.4292929292929293) internal successors, (2264), 1584 states have internal predecessors, (2264), 0 states have call successors, (0), 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 14:58:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2264 transitions. [2021-12-14 14:58:19,884 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2264 transitions. Word has length 46 [2021-12-14 14:58:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:19,885 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2264 transitions. [2021-12-14 14:58:19,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2264 transitions. [2021-12-14 14:58:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 14:58:19,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:19,898 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] [2021-12-14 14:58:19,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:58:19,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2021-12-14 14:58:19,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:19,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779663027] [2021-12-14 14:58:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:19,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:19,955 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 14:58:19,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779663027] [2021-12-14 14:58:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779663027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:19,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:19,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:19,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191163512] [2021-12-14 14:58:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:19,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:19,957 INFO L87 Difference]: Start difference. First operand 1585 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 14:58:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:20,032 INFO L93 Difference]: Finished difference Result 3787 states and 5424 transitions. [2021-12-14 14:58:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-14 14:58:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:20,041 INFO L225 Difference]: With dead ends: 3787 [2021-12-14 14:58:20,041 INFO L226 Difference]: Without dead ends: 2225 [2021-12-14 14:58:20,043 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 14:58:20,044 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:20,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 187 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-12-14 14:58:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2203. [2021-12-14 14:58:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 1.4178019981834695) internal successors, (3122), 2202 states have internal predecessors, (3122), 0 states have call successors, (0), 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 14:58:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3122 transitions. [2021-12-14 14:58:20,135 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3122 transitions. Word has length 47 [2021-12-14 14:58:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:20,137 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3122 transitions. [2021-12-14 14:58:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 14:58:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3122 transitions. [2021-12-14 14:58:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 14:58:20,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:20,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:58:20,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 613343109, now seen corresponding path program 1 times [2021-12-14 14:58:20,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:20,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473494092] [2021-12-14 14:58:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:20,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:20,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:20,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473494092] [2021-12-14 14:58:20,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473494092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:58:20,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13653978] [2021-12-14 14:58:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:20,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:58:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:58:20,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:58:20,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:58:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 14:58:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:58:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:58:20,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:58:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:58:20,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13653978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:58:20,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:58:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-14 14:58:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928275552] [2021-12-14 14:58:20,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:58:20,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 14:58:20,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 14:58:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:58:20,819 INFO L87 Difference]: Start difference. First operand 2203 states and 3122 transitions. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 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 14:58:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:23,875 INFO L93 Difference]: Finished difference Result 23583 states and 33190 transitions. [2021-12-14 14:58:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 14:58:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 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 68 [2021-12-14 14:58:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:23,937 INFO L225 Difference]: With dead ends: 23583 [2021-12-14 14:58:23,938 INFO L226 Difference]: Without dead ends: 21405 [2021-12-14 14:58:23,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 14:58:23,947 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 3325 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:23,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3325 Valid, 2622 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 14:58:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21405 states. [2021-12-14 14:58:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21405 to 11491. [2021-12-14 14:58:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 1.3942558746736293) internal successors, (16020), 11490 states have internal predecessors, (16020), 0 states have call successors, (0), 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 14:58:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 16020 transitions. [2021-12-14 14:58:24,526 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 16020 transitions. Word has length 68 [2021-12-14 14:58:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:24,526 INFO L470 AbstractCegarLoop]: Abstraction has 11491 states and 16020 transitions. [2021-12-14 14:58:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 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 14:58:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 16020 transitions. [2021-12-14 14:58:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 14:58:24,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:24,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:24,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 14:58:24,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:58:24,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 717525894, now seen corresponding path program 1 times [2021-12-14 14:58:24,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:24,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50025289] [2021-12-14 14:58:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:24,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:24,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50025289] [2021-12-14 14:58:24,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50025289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:24,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:24,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:24,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032327421] [2021-12-14 14:58:24,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:24,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:24,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:24,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:24,781 INFO L87 Difference]: Start difference. First operand 11491 states and 16020 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:25,264 INFO L93 Difference]: Finished difference Result 25344 states and 35256 transitions. [2021-12-14 14:58:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 14:58:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:25,291 INFO L225 Difference]: With dead ends: 25344 [2021-12-14 14:58:25,291 INFO L226 Difference]: Without dead ends: 17126 [2021-12-14 14:58:25,301 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 14:58:25,302 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:25,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 247 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17126 states. [2021-12-14 14:58:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17126 to 17124. [2021-12-14 14:58:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17124 states, 17123 states have (on average 1.3662325527068855) internal successors, (23394), 17123 states have internal predecessors, (23394), 0 states have call successors, (0), 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 14:58:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17124 states to 17124 states and 23394 transitions. [2021-12-14 14:58:25,886 INFO L78 Accepts]: Start accepts. Automaton has 17124 states and 23394 transitions. Word has length 68 [2021-12-14 14:58:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:25,886 INFO L470 AbstractCegarLoop]: Abstraction has 17124 states and 23394 transitions. [2021-12-14 14:58:25,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17124 states and 23394 transitions. [2021-12-14 14:58:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 14:58:25,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:25,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:25,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:58:25,890 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -55467066, now seen corresponding path program 1 times [2021-12-14 14:58:25,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417073983] [2021-12-14 14:58:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:25,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:25,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417073983] [2021-12-14 14:58:25,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417073983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:25,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:25,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:25,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618893746] [2021-12-14 14:58:25,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:25,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:25,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:25,915 INFO L87 Difference]: Start difference. First operand 17124 states and 23394 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:26,618 INFO L93 Difference]: Finished difference Result 34411 states and 46718 transitions. [2021-12-14 14:58:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 14:58:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:26,656 INFO L225 Difference]: With dead ends: 34411 [2021-12-14 14:58:26,657 INFO L226 Difference]: Without dead ends: 23489 [2021-12-14 14:58:26,671 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 14:58:26,671 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:26,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 219 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23489 states. [2021-12-14 14:58:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23489 to 23487. [2021-12-14 14:58:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23487 states, 23486 states have (on average 1.3409690879672997) internal successors, (31494), 23486 states have internal predecessors, (31494), 0 states have call successors, (0), 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 14:58:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23487 states to 23487 states and 31494 transitions. [2021-12-14 14:58:27,630 INFO L78 Accepts]: Start accepts. Automaton has 23487 states and 31494 transitions. Word has length 68 [2021-12-14 14:58:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 23487 states and 31494 transitions. [2021-12-14 14:58:27,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 23487 states and 31494 transitions. [2021-12-14 14:58:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 14:58:27,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:27,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:27,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:58:27,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 371878998, now seen corresponding path program 1 times [2021-12-14 14:58:27,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:27,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239325084] [2021-12-14 14:58:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:27,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:58:27,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:27,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239325084] [2021-12-14 14:58:27,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239325084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:27,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:27,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:27,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892340894] [2021-12-14 14:58:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:27,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:27,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:27,678 INFO L87 Difference]: Start difference. First operand 23487 states and 31494 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:28,538 INFO L93 Difference]: Finished difference Result 41713 states and 56042 transitions. [2021-12-14 14:58:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 14:58:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:28,580 INFO L225 Difference]: With dead ends: 41713 [2021-12-14 14:58:28,581 INFO L226 Difference]: Without dead ends: 34619 [2021-12-14 14:58:28,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:58:28,593 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 298 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:28,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 470 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34619 states. [2021-12-14 14:58:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34619 to 30111. [2021-12-14 14:58:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30111 states, 30110 states have (on average 1.3350381932912654) internal successors, (40198), 30110 states have internal predecessors, (40198), 0 states have call successors, (0), 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 14:58:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30111 states to 30111 states and 40198 transitions. [2021-12-14 14:58:29,704 INFO L78 Accepts]: Start accepts. Automaton has 30111 states and 40198 transitions. Word has length 68 [2021-12-14 14:58:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:29,704 INFO L470 AbstractCegarLoop]: Abstraction has 30111 states and 40198 transitions. [2021-12-14 14:58:29,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:58:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30111 states and 40198 transitions. [2021-12-14 14:58:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 14:58:29,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:29,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:29,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:58:29,709 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -846517202, now seen corresponding path program 1 times [2021-12-14 14:58:29,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:29,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232526417] [2021-12-14 14:58:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:29,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 14:58:29,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232526417] [2021-12-14 14:58:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232526417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:29,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:29,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:29,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562527807] [2021-12-14 14:58:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:29,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:29,756 INFO L87 Difference]: Start difference. First operand 30111 states and 40198 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 14:58:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:30,960 INFO L93 Difference]: Finished difference Result 51615 states and 69310 transitions. [2021-12-14 14:58:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 68 [2021-12-14 14:58:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:31,016 INFO L225 Difference]: With dead ends: 51615 [2021-12-14 14:58:31,016 INFO L226 Difference]: Without dead ends: 41009 [2021-12-14 14:58:31,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:58:31,032 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 296 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:31,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 499 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41009 states. [2021-12-14 14:58:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41009 to 37991. [2021-12-14 14:58:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37991 states, 37990 states have (on average 1.3299289286654383) internal successors, (50524), 37990 states have internal predecessors, (50524), 0 states have call successors, (0), 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 14:58:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37991 states to 37991 states and 50524 transitions. [2021-12-14 14:58:32,457 INFO L78 Accepts]: Start accepts. Automaton has 37991 states and 50524 transitions. Word has length 68 [2021-12-14 14:58:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:32,458 INFO L470 AbstractCegarLoop]: Abstraction has 37991 states and 50524 transitions. [2021-12-14 14:58:32,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 14:58:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 37991 states and 50524 transitions. [2021-12-14 14:58:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 14:58:32,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:32,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:58:32,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1063519862, now seen corresponding path program 1 times [2021-12-14 14:58:32,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:32,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107944398] [2021-12-14 14:58:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:32,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:58:32,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107944398] [2021-12-14 14:58:32,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107944398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:32,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:32,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:32,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048701728] [2021-12-14 14:58:32,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:32,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:58:32,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:58:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:58:32,496 INFO L87 Difference]: Start difference. First operand 37991 states and 50524 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:33,744 INFO L93 Difference]: Finished difference Result 50811 states and 67742 transitions. [2021-12-14 14:58:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:58:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 69 [2021-12-14 14:58:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:33,803 INFO L225 Difference]: With dead ends: 50811 [2021-12-14 14:58:33,803 INFO L226 Difference]: Without dead ends: 45175 [2021-12-14 14:58:33,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:58:33,818 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 285 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:33,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 471 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45175 states. [2021-12-14 14:58:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45175 to 42157. [2021-12-14 14:58:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42157 states, 42156 states have (on average 1.327355536578423) internal successors, (55956), 42156 states have internal predecessors, (55956), 0 states have call successors, (0), 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 14:58:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42157 states to 42157 states and 55956 transitions. [2021-12-14 14:58:35,635 INFO L78 Accepts]: Start accepts. Automaton has 42157 states and 55956 transitions. Word has length 69 [2021-12-14 14:58:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:35,635 INFO L470 AbstractCegarLoop]: Abstraction has 42157 states and 55956 transitions. [2021-12-14 14:58:35,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42157 states and 55956 transitions. [2021-12-14 14:58:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 14:58:35,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:35,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:35,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:58:35,641 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1024312551, now seen corresponding path program 1 times [2021-12-14 14:58:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:35,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9827400] [2021-12-14 14:58:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:35,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:35,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:35,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9827400] [2021-12-14 14:58:35,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9827400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:35,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:35,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:35,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223124408] [2021-12-14 14:58:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:35,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:35,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:35,664 INFO L87 Difference]: Start difference. First operand 42157 states and 55956 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 14:58:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:36,927 INFO L93 Difference]: Finished difference Result 77153 states and 101929 transitions. [2021-12-14 14:58:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-14 14:58:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:36,985 INFO L225 Difference]: With dead ends: 77153 [2021-12-14 14:58:36,986 INFO L226 Difference]: Without dead ends: 43070 [2021-12-14 14:58:37,013 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 14:58:37,014 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 51 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:37,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 245 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43070 states. [2021-12-14 14:58:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43070 to 42234. [2021-12-14 14:58:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42234 states, 42233 states have (on average 1.3113678876707788) internal successors, (55383), 42233 states have internal predecessors, (55383), 0 states have call successors, (0), 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 14:58:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42234 states to 42234 states and 55383 transitions. [2021-12-14 14:58:38,880 INFO L78 Accepts]: Start accepts. Automaton has 42234 states and 55383 transitions. Word has length 71 [2021-12-14 14:58:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:38,880 INFO L470 AbstractCegarLoop]: Abstraction has 42234 states and 55383 transitions. [2021-12-14 14:58:38,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 14:58:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42234 states and 55383 transitions. [2021-12-14 14:58:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 14:58:38,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:38,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:38,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 14:58:38,901 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1831633139, now seen corresponding path program 1 times [2021-12-14 14:58:38,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:38,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933414303] [2021-12-14 14:58:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:38,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:38,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933414303] [2021-12-14 14:58:38,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933414303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:38,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:38,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:58:38,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427878626] [2021-12-14 14:58:38,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:38,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:58:38,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:58:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:58:38,947 INFO L87 Difference]: Start difference. First operand 42234 states and 55383 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:58:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:40,200 INFO L93 Difference]: Finished difference Result 66730 states and 87286 transitions. [2021-12-14 14:58:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:58:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-14 14:58:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:40,252 INFO L225 Difference]: With dead ends: 66730 [2021-12-14 14:58:40,252 INFO L226 Difference]: Without dead ends: 42252 [2021-12-14 14:58:40,274 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 14:58:40,274 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:40,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 228 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:58:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42252 states. [2021-12-14 14:58:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42252 to 35602. [2021-12-14 14:58:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35602 states, 35601 states have (on average 1.299485969495239) internal successors, (46263), 35601 states have internal predecessors, (46263), 0 states have call successors, (0), 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 14:58:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35602 states to 35602 states and 46263 transitions. [2021-12-14 14:58:41,712 INFO L78 Accepts]: Start accepts. Automaton has 35602 states and 46263 transitions. Word has length 72 [2021-12-14 14:58:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:41,712 INFO L470 AbstractCegarLoop]: Abstraction has 35602 states and 46263 transitions. [2021-12-14 14:58:41,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:58:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35602 states and 46263 transitions. [2021-12-14 14:58:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 14:58:41,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:41,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:41,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 14:58:41,717 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -689106483, now seen corresponding path program 1 times [2021-12-14 14:58:41,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151315615] [2021-12-14 14:58:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:41,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 14:58:41,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151315615] [2021-12-14 14:58:41,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151315615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:41,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:41,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:41,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137533744] [2021-12-14 14:58:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:41,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:58:41,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:58:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:58:41,755 INFO L87 Difference]: Start difference. First operand 35602 states and 46263 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:43,553 INFO L93 Difference]: Finished difference Result 88760 states and 115042 transitions. [2021-12-14 14:58:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:58:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 72 [2021-12-14 14:58:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:43,633 INFO L225 Difference]: With dead ends: 88760 [2021-12-14 14:58:43,633 INFO L226 Difference]: Without dead ends: 53209 [2021-12-14 14:58:43,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:58:43,671 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 477 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:43,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 210 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:58:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53209 states. [2021-12-14 14:58:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53209 to 50467. [2021-12-14 14:58:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 1.2836959537114097) internal successors, (64783), 50466 states have internal predecessors, (64783), 0 states have call successors, (0), 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 14:58:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 64783 transitions. [2021-12-14 14:58:45,812 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 64783 transitions. Word has length 72 [2021-12-14 14:58:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:45,812 INFO L470 AbstractCegarLoop]: Abstraction has 50467 states and 64783 transitions. [2021-12-14 14:58:45,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:58:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 64783 transitions. [2021-12-14 14:58:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 14:58:45,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:45,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 14:58:45,818 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1112753205, now seen corresponding path program 1 times [2021-12-14 14:58:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325158749] [2021-12-14 14:58:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:45,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:45,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325158749] [2021-12-14 14:58:45,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325158749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:58:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917290898] [2021-12-14 14:58:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:45,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:58:45,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:58:45,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:58:45,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:58:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:45,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:58:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:58:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:46,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:58:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:46,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917290898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:58:46,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:58:46,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 14:58:46,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546393373] [2021-12-14 14:58:46,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:58:46,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:58:46,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:58:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:58:46,311 INFO L87 Difference]: Start difference. First operand 50467 states and 64783 transitions. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 14:58:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:49,747 INFO L93 Difference]: Finished difference Result 128004 states and 164337 transitions. [2021-12-14 14:58:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:58:49,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 72 [2021-12-14 14:58:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:49,865 INFO L225 Difference]: With dead ends: 128004 [2021-12-14 14:58:49,866 INFO L226 Difference]: Without dead ends: 90229 [2021-12-14 14:58:49,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-14 14:58:49,903 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1318 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:49,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 400 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:58:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90229 states. [2021-12-14 14:58:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90229 to 54063. [2021-12-14 14:58:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54063 states, 54062 states have (on average 1.285893973585883) internal successors, (69518), 54062 states have internal predecessors, (69518), 0 states have call successors, (0), 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 14:58:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54063 states to 54063 states and 69518 transitions. [2021-12-14 14:58:52,528 INFO L78 Accepts]: Start accepts. Automaton has 54063 states and 69518 transitions. Word has length 72 [2021-12-14 14:58:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:52,528 INFO L470 AbstractCegarLoop]: Abstraction has 54063 states and 69518 transitions. [2021-12-14 14:58:52,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 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 14:58:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 54063 states and 69518 transitions. [2021-12-14 14:58:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 14:58:52,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:52,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:52,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:58:52,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 14:58:52,748 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash -688109363, now seen corresponding path program 1 times [2021-12-14 14:58:52,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877510939] [2021-12-14 14:58:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:52,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:52,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877510939] [2021-12-14 14:58:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877510939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:58:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237010281] [2021-12-14 14:58:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:52,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:58:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:58:52,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:58:52,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:58:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:58:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:58:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:53,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:58:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:58:53,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237010281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:58:53,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:58:53,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 14:58:53,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632659851] [2021-12-14 14:58:53,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:58:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:58:53,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:58:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:58:53,287 INFO L87 Difference]: Start difference. First operand 54063 states and 69518 transitions. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 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 14:58:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:58:56,345 INFO L93 Difference]: Finished difference Result 98402 states and 125814 transitions. [2021-12-14 14:58:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:58:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 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 73 [2021-12-14 14:58:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:58:56,450 INFO L225 Difference]: With dead ends: 98402 [2021-12-14 14:58:56,450 INFO L226 Difference]: Without dead ends: 74838 [2021-12-14 14:58:56,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-14 14:58:56,477 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1003 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:58:56,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 325 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:58:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74838 states. [2021-12-14 14:58:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74838 to 55188. [2021-12-14 14:58:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55188 states, 55187 states have (on average 1.2737963650859805) internal successors, (70297), 55187 states have internal predecessors, (70297), 0 states have call successors, (0), 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 14:58:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55188 states to 55188 states and 70297 transitions. [2021-12-14 14:58:59,035 INFO L78 Accepts]: Start accepts. Automaton has 55188 states and 70297 transitions. Word has length 73 [2021-12-14 14:58:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:58:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 55188 states and 70297 transitions. [2021-12-14 14:58:59,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 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 14:58:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 55188 states and 70297 transitions. [2021-12-14 14:58:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 14:58:59,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:58:59,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:58:59,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 14:58:59,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:58:59,258 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:58:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:58:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1239769223, now seen corresponding path program 1 times [2021-12-14 14:58:59,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:58:59,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782931342] [2021-12-14 14:58:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:58:59,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:58:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:58:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:58:59,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:58:59,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782931342] [2021-12-14 14:58:59,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782931342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:58:59,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:58:59,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:58:59,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172100907] [2021-12-14 14:58:59,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:58:59,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:58:59,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:58:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:58:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:58:59,463 INFO L87 Difference]: Start difference. First operand 55188 states and 70297 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 14:59:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:02,114 INFO L93 Difference]: Finished difference Result 114042 states and 145743 transitions. [2021-12-14 14:59:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:02,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 73 [2021-12-14 14:59:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:02,199 INFO L225 Difference]: With dead ends: 114042 [2021-12-14 14:59:02,199 INFO L226 Difference]: Without dead ends: 58911 [2021-12-14 14:59:02,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:59:02,219 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 540 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:02,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 205 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:59:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58911 states. [2021-12-14 14:59:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58911 to 55411. [2021-12-14 14:59:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55411 states, 55410 states have (on average 1.2610359140949288) internal successors, (69874), 55410 states have internal predecessors, (69874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)