./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.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 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:13:14,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:13:14,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:13:14,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:13:14,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:13:14,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:13:14,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:13:14,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:13:14,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:13:14,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:13:14,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:13:14,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:13:14,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:13:14,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:13:14,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:13:14,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:13:14,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:13:14,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:13:14,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:13:14,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:13:14,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:13:14,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:13:14,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:13:14,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:13:14,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:13:14,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:13:14,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:13:14,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:13:14,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:13:14,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:13:14,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:13:14,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:13:14,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:13:14,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:13:14,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:13:14,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:13:14,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:13:14,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:13:14,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:13:14,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:13:14,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:13:14,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:13:14,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:13:14,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:13:14,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:13:14,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:13:14,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:13:14,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:13:14,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:13:14,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:13:14,937 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:13:14,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:13:14,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:13:14,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:13:14,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:13:14,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:13:14,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:13:14,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:13:14,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:13:14,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:13:14,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:13:14,940 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:13:14,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:13:14,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:13:14,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:13:14,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 [2021-12-15 11:13:15,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:13:15,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:13:15,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:13:15,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:13:15,152 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:13:15,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:13:15,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8fba1f/d496cb13b25040e28dd601406758cc02/FLAG7effc8766 [2021-12-15 11:13:15,572 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:13:15,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:13:15,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8fba1f/d496cb13b25040e28dd601406758cc02/FLAG7effc8766 [2021-12-15 11:13:15,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8fba1f/d496cb13b25040e28dd601406758cc02 [2021-12-15 11:13:15,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:13:15,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:13:15,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:13:15,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:13:15,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:13:15,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241cd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15, skipping insertion in model container [2021-12-15 11:13:15,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:13:15,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:13:15,846 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-15 11:13:15,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:13:15,854 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:13:15,886 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-15 11:13:15,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:13:15,896 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:13:15,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15 WrapperNode [2021-12-15 11:13:15,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:13:15,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:13:15,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:13:15,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:13:15,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,956 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 429 [2021-12-15 11:13:15,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:13:15,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:13:15,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:13:15,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:13:15,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:15,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:13:15,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:13:15,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:13:15,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:13:15,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (1/1) ... [2021-12-15 11:13:16,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:13:16,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:13:16,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:13:16,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:13:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:13:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:13:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:13:16,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:13:16,141 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:13:16,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:13:16,476 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:13:16,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:13:16,482 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:13:16,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:13:16 BoogieIcfgContainer [2021-12-15 11:13:16,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:13:16,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:13:16,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:13:16,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:13:16,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:13:15" (1/3) ... [2021-12-15 11:13:16,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da03312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:13:16, skipping insertion in model container [2021-12-15 11:13:16,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:13:15" (2/3) ... [2021-12-15 11:13:16,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da03312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:13:16, skipping insertion in model container [2021-12-15 11:13:16,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:13:16" (3/3) ... [2021-12-15 11:13:16,491 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:13:16,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:13:16,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:13:16,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:13:16,529 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:13:16,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:13:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:13:16,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:16,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:16,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:16,556 INFO L85 PathProgramCache]: Analyzing trace with hash 632685314, now seen corresponding path program 1 times [2021-12-15 11:13:16,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:16,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179768657] [2021-12-15 11:13:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:16,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:16,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179768657] [2021-12-15 11:13:16,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179768657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:16,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:16,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:13:16,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949664499] [2021-12-15 11:13:16,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:16,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:13:16,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:13:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:13:16,758 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:16,791 INFO L93 Difference]: Finished difference Result 200 states and 340 transitions. [2021-12-15 11:13:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:13:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:13:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:16,802 INFO L225 Difference]: With dead ends: 200 [2021-12-15 11:13:16,802 INFO L226 Difference]: Without dead ends: 121 [2021-12-15 11:13:16,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:13:16,808 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-15 11:13:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-15 11:13:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7333333333333334) internal successors, (208), 120 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 208 transitions. [2021-12-15 11:13:16,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 208 transitions. Word has length 37 [2021-12-15 11:13:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:16,839 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 208 transitions. [2021-12-15 11:13:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 208 transitions. [2021-12-15 11:13:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:13:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:16,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:13:16,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash -184963136, now seen corresponding path program 1 times [2021-12-15 11:13:16,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016950594] [2021-12-15 11:13:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:16,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:16,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:16,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016950594] [2021-12-15 11:13:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016950594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:16,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:16,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096944713] [2021-12-15 11:13:16,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:16,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:16,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:16,967 INFO L87 Difference]: Start difference. First operand 121 states and 208 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,047 INFO L93 Difference]: Finished difference Result 265 states and 448 transitions. [2021-12-15 11:13:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:13:17,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:13:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,051 INFO L225 Difference]: With dead ends: 265 [2021-12-15 11:13:17,051 INFO L226 Difference]: Without dead ends: 191 [2021-12-15 11:13:17,052 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 [2021-12-15 11:13:17,053 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 120 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 790 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-15 11:13:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2021-12-15 11:13:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5583333333333333) internal successors, (187), 120 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 187 transitions. [2021-12-15 11:13:17,066 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 187 transitions. Word has length 37 [2021-12-15 11:13:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,066 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 187 transitions. [2021-12-15 11:13:17,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 187 transitions. [2021-12-15 11:13:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 11:13:17,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:13:17,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1843152740, now seen corresponding path program 1 times [2021-12-15 11:13:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128656290] [2021-12-15 11:13:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128656290] [2021-12-15 11:13:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128656290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168094455] [2021-12-15 11:13:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:17,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,133 INFO L87 Difference]: Start difference. First operand 121 states and 187 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,167 INFO L93 Difference]: Finished difference Result 252 states and 406 transitions. [2021-12-15 11:13:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-15 11:13:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,169 INFO L225 Difference]: With dead ends: 252 [2021-12-15 11:13:17,169 INFO L226 Difference]: Without dead ends: 182 [2021-12-15 11:13:17,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,170 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-15 11:13:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-12-15 11:13:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2021-12-15 11:13:17,181 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 57 [2021-12-15 11:13:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,181 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2021-12-15 11:13:17,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2021-12-15 11:13:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 11:13:17,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:13:17,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 700379209, now seen corresponding path program 1 times [2021-12-15 11:13:17,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778663062] [2021-12-15 11:13:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778663062] [2021-12-15 11:13:17,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778663062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:17,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257161050] [2021-12-15 11:13:17,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:17,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,280 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,296 INFO L93 Difference]: Finished difference Result 307 states and 495 transitions. [2021-12-15 11:13:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-15 11:13:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,299 INFO L225 Difference]: With dead ends: 307 [2021-12-15 11:13:17,299 INFO L226 Difference]: Without dead ends: 237 [2021-12-15 11:13:17,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,300 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 429 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-15 11:13:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2021-12-15 11:13:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5982905982905984) internal successors, (374), 234 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 374 transitions. [2021-12-15 11:13:17,309 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 374 transitions. Word has length 59 [2021-12-15 11:13:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 374 transitions. [2021-12-15 11:13:17,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 374 transitions. [2021-12-15 11:13:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 11:13:17,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:13:17,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1943315629, now seen corresponding path program 1 times [2021-12-15 11:13:17,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639798440] [2021-12-15 11:13:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639798440] [2021-12-15 11:13:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639798440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905667448] [2021-12-15 11:13:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:17,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,375 INFO L87 Difference]: Start difference. First operand 235 states and 374 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,399 INFO L93 Difference]: Finished difference Result 578 states and 941 transitions. [2021-12-15 11:13:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-15 11:13:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,402 INFO L225 Difference]: With dead ends: 578 [2021-12-15 11:13:17,402 INFO L226 Difference]: Without dead ends: 396 [2021-12-15 11:13:17,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,408 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 422 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-15 11:13:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2021-12-15 11:13:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.61323155216285) internal successors, (634), 393 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 634 transitions. [2021-12-15 11:13:17,426 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 634 transitions. Word has length 59 [2021-12-15 11:13:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,426 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 634 transitions. [2021-12-15 11:13:17,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 634 transitions. [2021-12-15 11:13:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:13:17,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:13:17,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1342077512, now seen corresponding path program 1 times [2021-12-15 11:13:17,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492522278] [2021-12-15 11:13:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492522278] [2021-12-15 11:13:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492522278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:17,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491512603] [2021-12-15 11:13:17,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:17,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,458 INFO L87 Difference]: Start difference. First operand 394 states and 634 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,477 INFO L93 Difference]: Finished difference Result 723 states and 1177 transitions. [2021-12-15 11:13:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-12-15 11:13:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,480 INFO L225 Difference]: With dead ends: 723 [2021-12-15 11:13:17,480 INFO L226 Difference]: Without dead ends: 541 [2021-12-15 11:13:17,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,483 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 96 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-15 11:13:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-12-15 11:13:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.6152416356877324) internal successors, (869), 538 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 869 transitions. [2021-12-15 11:13:17,495 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 869 transitions. Word has length 61 [2021-12-15 11:13:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,495 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 869 transitions. [2021-12-15 11:13:17,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 869 transitions. [2021-12-15 11:13:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:13:17,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:13:17,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash -308214334, now seen corresponding path program 1 times [2021-12-15 11:13:17,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736505412] [2021-12-15 11:13:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736505412] [2021-12-15 11:13:17,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736505412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:17,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351914423] [2021-12-15 11:13:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:17,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,551 INFO L87 Difference]: Start difference. First operand 539 states and 869 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,576 INFO L93 Difference]: Finished difference Result 1428 states and 2320 transitions. [2021-12-15 11:13:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-12-15 11:13:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,580 INFO L225 Difference]: With dead ends: 1428 [2021-12-15 11:13:17,580 INFO L226 Difference]: Without dead ends: 952 [2021-12-15 11:13:17,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:17,581 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 358 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-15 11:13:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 950. [2021-12-15 11:13:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.608008429926238) internal successors, (1526), 949 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1526 transitions. [2021-12-15 11:13:17,601 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1526 transitions. Word has length 61 [2021-12-15 11:13:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,602 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1526 transitions. [2021-12-15 11:13:17,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1526 transitions. [2021-12-15 11:13:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:13:17,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:13:17,604 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 349619889, now seen corresponding path program 1 times [2021-12-15 11:13:17,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409749155] [2021-12-15 11:13:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409749155] [2021-12-15 11:13:17,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409749155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:17,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119650478] [2021-12-15 11:13:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:17,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:17,646 INFO L87 Difference]: Start difference. First operand 950 states and 1526 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:17,781 INFO L93 Difference]: Finished difference Result 4661 states and 7632 transitions. [2021-12-15 11:13:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:13:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 11:13:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:17,793 INFO L225 Difference]: With dead ends: 4661 [2021-12-15 11:13:17,794 INFO L226 Difference]: Without dead ends: 3774 [2021-12-15 11:13:17,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:13:17,796 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 865 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:17,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 906 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:13:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-12-15 11:13:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1770. [2021-12-15 11:13:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.607687959299039) internal successors, (2844), 1769 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2844 transitions. [2021-12-15 11:13:17,852 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2844 transitions. Word has length 63 [2021-12-15 11:13:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:17,852 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2844 transitions. [2021-12-15 11:13:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2844 transitions. [2021-12-15 11:13:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:13:17,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:17,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:17,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:13:17,857 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash 325449286, now seen corresponding path program 1 times [2021-12-15 11:13:17,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:17,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036944565] [2021-12-15 11:13:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:17,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:17,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036944565] [2021-12-15 11:13:17,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036944565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:17,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:17,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:17,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860556040] [2021-12-15 11:13:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:17,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:17,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:17,910 INFO L87 Difference]: Start difference. First operand 1770 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:18,011 INFO L93 Difference]: Finished difference Result 5679 states and 9231 transitions. [2021-12-15 11:13:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:13:18,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 11:13:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:18,022 INFO L225 Difference]: With dead ends: 5679 [2021-12-15 11:13:18,022 INFO L226 Difference]: Without dead ends: 3972 [2021-12-15 11:13:18,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:18,027 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 338 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:18,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-12-15 11:13:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2858. [2021-12-15 11:13:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 1.6107805390269514) internal successors, (4602), 2857 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4602 transitions. [2021-12-15 11:13:18,113 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4602 transitions. Word has length 64 [2021-12-15 11:13:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:18,113 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 4602 transitions. [2021-12-15 11:13:18,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4602 transitions. [2021-12-15 11:13:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:13:18,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:18,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:18,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:13:18,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 905685231, now seen corresponding path program 1 times [2021-12-15 11:13:18,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:18,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464621884] [2021-12-15 11:13:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:18,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:18,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:18,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464621884] [2021-12-15 11:13:18,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464621884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:18,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:18,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:18,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390023327] [2021-12-15 11:13:18,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:18,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:18,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:18,147 INFO L87 Difference]: Start difference. First operand 2858 states and 4602 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:18,205 INFO L93 Difference]: Finished difference Result 5558 states and 8983 transitions. [2021-12-15 11:13:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 11:13:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:18,217 INFO L225 Difference]: With dead ends: 5558 [2021-12-15 11:13:18,217 INFO L226 Difference]: Without dead ends: 3988 [2021-12-15 11:13:18,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:18,221 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 90 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:18,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 407 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2021-12-15 11:13:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3986. [2021-12-15 11:13:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3985 states have (on average 1.6005018820577164) internal successors, (6378), 3985 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 6378 transitions. [2021-12-15 11:13:18,325 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 6378 transitions. Word has length 64 [2021-12-15 11:13:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:18,325 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 6378 transitions. [2021-12-15 11:13:18,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 6378 transitions. [2021-12-15 11:13:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:13:18,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:18,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:18,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:13:18,326 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -254835064, now seen corresponding path program 1 times [2021-12-15 11:13:18,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:18,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280848815] [2021-12-15 11:13:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:18,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:18,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280848815] [2021-12-15 11:13:18,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280848815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:18,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:18,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:18,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797210935] [2021-12-15 11:13:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:18,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:18,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:18,368 INFO L87 Difference]: Start difference. First operand 3986 states and 6378 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:18,587 INFO L93 Difference]: Finished difference Result 12749 states and 20489 transitions. [2021-12-15 11:13:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:13:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 11:13:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:18,632 INFO L225 Difference]: With dead ends: 12749 [2021-12-15 11:13:18,632 INFO L226 Difference]: Without dead ends: 8836 [2021-12-15 11:13:18,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:18,640 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 336 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 562 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-12-15 11:13:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6382. [2021-12-15 11:13:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.5919134931828867) internal successors, (10158), 6381 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10158 transitions. [2021-12-15 11:13:18,827 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10158 transitions. Word has length 65 [2021-12-15 11:13:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:18,827 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 10158 transitions. [2021-12-15 11:13:18,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10158 transitions. [2021-12-15 11:13:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:13:18,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:18,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:18,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:13:18,848 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -894776387, now seen corresponding path program 1 times [2021-12-15 11:13:18,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643938012] [2021-12-15 11:13:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:18,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:18,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643938012] [2021-12-15 11:13:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643938012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:18,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:18,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606270169] [2021-12-15 11:13:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:18,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:18,894 INFO L87 Difference]: Start difference. First operand 6382 states and 10158 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:19,216 INFO L93 Difference]: Finished difference Result 20041 states and 32013 transitions. [2021-12-15 11:13:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:13:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 11:13:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:19,243 INFO L225 Difference]: With dead ends: 20041 [2021-12-15 11:13:19,244 INFO L226 Difference]: Without dead ends: 13732 [2021-12-15 11:13:19,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:19,254 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 334 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 612 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-12-15 11:13:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 10014. [2021-12-15 11:13:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.582942175172276) internal successors, (15850), 10013 states have internal predecessors, (15850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15850 transitions. [2021-12-15 11:13:19,576 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15850 transitions. Word has length 66 [2021-12-15 11:13:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:19,576 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15850 transitions. [2021-12-15 11:13:19,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15850 transitions. [2021-12-15 11:13:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:13:19,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:19,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:13:19,578 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1280795893, now seen corresponding path program 1 times [2021-12-15 11:13:19,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037731498] [2021-12-15 11:13:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:19,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:19,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037731498] [2021-12-15 11:13:19,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037731498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:19,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:19,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:19,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106891812] [2021-12-15 11:13:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:19,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:19,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:19,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:19,677 INFO L87 Difference]: Start difference. First operand 10014 states and 15850 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) [2021-12-15 11:13:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:19,947 INFO L93 Difference]: Finished difference Result 19957 states and 31602 transitions. [2021-12-15 11:13:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:19,948 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 68 [2021-12-15 11:13:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:19,964 INFO L225 Difference]: With dead ends: 19957 [2021-12-15 11:13:19,964 INFO L226 Difference]: Without dead ends: 10016 [2021-12-15 11:13:19,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:13:19,976 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 247 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:19,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 495 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-12-15 11:13:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 10014. [2021-12-15 11:13:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.570458404074703) internal successors, (15725), 10013 states have internal predecessors, (15725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15725 transitions. [2021-12-15 11:13:20,222 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15725 transitions. Word has length 68 [2021-12-15 11:13:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15725 transitions. [2021-12-15 11:13:20,222 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) [2021-12-15 11:13:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15725 transitions. [2021-12-15 11:13:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:13:20,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:20,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:20,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:13:20,223 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1403896683, now seen corresponding path program 1 times [2021-12-15 11:13:20,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:20,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730829454] [2021-12-15 11:13:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:20,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:20,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730829454] [2021-12-15 11:13:20,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730829454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:20,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:20,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:20,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653141240] [2021-12-15 11:13:20,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:20,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:20,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:20,291 INFO L87 Difference]: Start difference. First operand 10014 states and 15725 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2021-12-15 11:13:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:20,691 INFO L93 Difference]: Finished difference Result 28683 states and 45188 transitions. [2021-12-15 11:13:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 [2021-12-15 11:13:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:20,724 INFO L225 Difference]: With dead ends: 28683 [2021-12-15 11:13:20,724 INFO L226 Difference]: Without dead ends: 18742 [2021-12-15 11:13:20,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:13:20,742 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 157 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:20,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 664 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18742 states. [2021-12-15 11:13:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18742 to 18740. [2021-12-15 11:13:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18740 states, 18739 states have (on average 1.5567532952665564) internal successors, (29172), 18739 states have internal predecessors, (29172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18740 states to 18740 states and 29172 transitions. [2021-12-15 11:13:21,152 INFO L78 Accepts]: Start accepts. Automaton has 18740 states and 29172 transitions. Word has length 71 [2021-12-15 11:13:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:21,152 INFO L470 AbstractCegarLoop]: Abstraction has 18740 states and 29172 transitions. [2021-12-15 11:13:21,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2021-12-15 11:13:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 18740 states and 29172 transitions. [2021-12-15 11:13:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:13:21,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:21,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:21,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:13:21,153 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash 142548510, now seen corresponding path program 1 times [2021-12-15 11:13:21,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:21,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330686697] [2021-12-15 11:13:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:21,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:13:21,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330686697] [2021-12-15 11:13:21,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330686697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:21,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:21,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:21,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346863047] [2021-12-15 11:13:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:21,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:21,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:21,222 INFO L87 Difference]: Start difference. First operand 18740 states and 29172 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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) [2021-12-15 11:13:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:21,803 INFO L93 Difference]: Finished difference Result 36832 states and 56655 transitions. [2021-12-15 11:13:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:13:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 [2021-12-15 11:13:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:21,863 INFO L225 Difference]: With dead ends: 36832 [2021-12-15 11:13:21,863 INFO L226 Difference]: Without dead ends: 36830 [2021-12-15 11:13:21,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:13:21,875 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 296 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:21,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 803 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2021-12-15 11:13:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 19826. [2021-12-15 11:13:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19826 states, 19825 states have (on average 1.5258007566204288) internal successors, (30249), 19825 states have internal predecessors, (30249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19826 states to 19826 states and 30249 transitions. [2021-12-15 11:13:22,521 INFO L78 Accepts]: Start accepts. Automaton has 19826 states and 30249 transitions. Word has length 72 [2021-12-15 11:13:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:22,521 INFO L470 AbstractCegarLoop]: Abstraction has 19826 states and 30249 transitions. [2021-12-15 11:13:22,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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) [2021-12-15 11:13:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 19826 states and 30249 transitions. [2021-12-15 11:13:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 11:13:22,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:22,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:13:22,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash -561021637, now seen corresponding path program 1 times [2021-12-15 11:13:22,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:22,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773293613] [2021-12-15 11:13:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:22,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:13:22,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773293613] [2021-12-15 11:13:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773293613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:22,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:22,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:22,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572937034] [2021-12-15 11:13:22,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:22,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:22,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:22,573 INFO L87 Difference]: Start difference. First operand 19826 states and 30249 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:23,412 INFO L93 Difference]: Finished difference Result 48524 states and 74305 transitions. [2021-12-15 11:13:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 97 [2021-12-15 11:13:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:23,464 INFO L225 Difference]: With dead ends: 48524 [2021-12-15 11:13:23,464 INFO L226 Difference]: Without dead ends: 39122 [2021-12-15 11:13:23,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:13:23,479 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 422 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:23,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 751 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39122 states. [2021-12-15 11:13:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39122 to 30494. [2021-12-15 11:13:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30494 states, 30493 states have (on average 1.5242514675499295) internal successors, (46479), 30493 states have internal predecessors, (46479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30494 states to 30494 states and 46479 transitions. [2021-12-15 11:13:24,321 INFO L78 Accepts]: Start accepts. Automaton has 30494 states and 46479 transitions. Word has length 97 [2021-12-15 11:13:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:24,321 INFO L470 AbstractCegarLoop]: Abstraction has 30494 states and 46479 transitions. [2021-12-15 11:13:24,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30494 states and 46479 transitions. [2021-12-15 11:13:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 11:13:24,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:24,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:24,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:13:24,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1328546247, now seen corresponding path program 1 times [2021-12-15 11:13:24,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701996371] [2021-12-15 11:13:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:24,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:13:24,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701996371] [2021-12-15 11:13:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701996371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:24,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:24,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:24,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931963360] [2021-12-15 11:13:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:24,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:24,370 INFO L87 Difference]: Start difference. First operand 30494 states and 46479 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:25,069 INFO L93 Difference]: Finished difference Result 52292 states and 80089 transitions. [2021-12-15 11:13:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 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 97 [2021-12-15 11:13:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:25,330 INFO L225 Difference]: With dead ends: 52292 [2021-12-15 11:13:25,330 INFO L226 Difference]: Without dead ends: 42890 [2021-12-15 11:13:25,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:13:25,346 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 415 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:25,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 811 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42890 states. [2021-12-15 11:13:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42890 to 41332. [2021-12-15 11:13:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41332 states, 41331 states have (on average 1.5250296387699305) internal successors, (63031), 41331 states have internal predecessors, (63031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41332 states to 41332 states and 63031 transitions. [2021-12-15 11:13:26,423 INFO L78 Accepts]: Start accepts. Automaton has 41332 states and 63031 transitions. Word has length 97 [2021-12-15 11:13:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 41332 states and 63031 transitions. [2021-12-15 11:13:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 41332 states and 63031 transitions. [2021-12-15 11:13:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 11:13:26,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:26,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:26,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:13:26,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 425698093, now seen corresponding path program 1 times [2021-12-15 11:13:26,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:26,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772261022] [2021-12-15 11:13:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:26,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:13:26,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:26,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772261022] [2021-12-15 11:13:26,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772261022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:26,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:26,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:13:26,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831921897] [2021-12-15 11:13:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:26,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:13:26,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:13:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:26,470 INFO L87 Difference]: Start difference. First operand 41332 states and 63031 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:27,585 INFO L93 Difference]: Finished difference Result 58744 states and 90139 transitions. [2021-12-15 11:13:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 97 [2021-12-15 11:13:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:27,651 INFO L225 Difference]: With dead ends: 58744 [2021-12-15 11:13:27,651 INFO L226 Difference]: Without dead ends: 49082 [2021-12-15 11:13:27,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:13:27,673 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 418 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 864 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49082 states. [2021-12-15 11:13:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49082 to 47524. [2021-12-15 11:13:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47524 states, 47523 states have (on average 1.5279128001178377) internal successors, (72611), 47523 states have internal predecessors, (72611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47524 states to 47524 states and 72611 transitions. [2021-12-15 11:13:28,894 INFO L78 Accepts]: Start accepts. Automaton has 47524 states and 72611 transitions. Word has length 97 [2021-12-15 11:13:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:28,895 INFO L470 AbstractCegarLoop]: Abstraction has 47524 states and 72611 transitions. [2021-12-15 11:13:28,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 47524 states and 72611 transitions. [2021-12-15 11:13:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:13:28,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:28,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:28,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:13:28,898 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 422142567, now seen corresponding path program 1 times [2021-12-15 11:13:28,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:28,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279370213] [2021-12-15 11:13:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:28,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:13:28,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279370213] [2021-12-15 11:13:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279370213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:28,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:28,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:28,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91862620] [2021-12-15 11:13:28,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:28,986 INFO L87 Difference]: Start difference. First operand 47524 states and 72611 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:30,916 INFO L93 Difference]: Finished difference Result 113833 states and 174640 transitions. [2021-12-15 11:13:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 98 [2021-12-15 11:13:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:31,058 INFO L225 Difference]: With dead ends: 113833 [2021-12-15 11:13:31,058 INFO L226 Difference]: Without dead ends: 85953 [2021-12-15 11:13:31,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:31,088 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 326 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:31,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 528 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85953 states. [2021-12-15 11:13:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85953 to 73627. [2021-12-15 11:13:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73627 states, 73626 states have (on average 1.5296498519544726) internal successors, (112622), 73626 states have internal predecessors, (112622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73627 states to 73627 states and 112622 transitions. [2021-12-15 11:13:33,328 INFO L78 Accepts]: Start accepts. Automaton has 73627 states and 112622 transitions. Word has length 98 [2021-12-15 11:13:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 73627 states and 112622 transitions. [2021-12-15 11:13:33,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 73627 states and 112622 transitions. [2021-12-15 11:13:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:13:33,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:33,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:33,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:13:33,330 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1611093686, now seen corresponding path program 1 times [2021-12-15 11:13:33,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153410803] [2021-12-15 11:13:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:33,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:13:33,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153410803] [2021-12-15 11:13:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153410803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:33,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:33,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:33,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929298285] [2021-12-15 11:13:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:33,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:33,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:33,368 INFO L87 Difference]: Start difference. First operand 73627 states and 112622 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:35,470 INFO L93 Difference]: Finished difference Result 118456 states and 182269 transitions. [2021-12-15 11:13:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:13:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 98 [2021-12-15 11:13:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:35,623 INFO L225 Difference]: With dead ends: 118456 [2021-12-15 11:13:35,623 INFO L226 Difference]: Without dead ends: 95260 [2021-12-15 11:13:35,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:35,664 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 189 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:35,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 559 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95260 states. [2021-12-15 11:13:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95260 to 92238. [2021-12-15 11:13:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92238 states, 92237 states have (on average 1.5303836855058166) internal successors, (141158), 92237 states have internal predecessors, (141158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92238 states to 92238 states and 141158 transitions. [2021-12-15 11:13:38,481 INFO L78 Accepts]: Start accepts. Automaton has 92238 states and 141158 transitions. Word has length 98 [2021-12-15 11:13:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 92238 states and 141158 transitions. [2021-12-15 11:13:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 92238 states and 141158 transitions. [2021-12-15 11:13:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:13:38,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:38,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:13:38,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1030857741, now seen corresponding path program 1 times [2021-12-15 11:13:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402672694] [2021-12-15 11:13:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:13:38,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402672694] [2021-12-15 11:13:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402672694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:38,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:38,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962232469] [2021-12-15 11:13:38,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:38,561 INFO L87 Difference]: Start difference. First operand 92238 states and 141158 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:42,474 INFO L93 Difference]: Finished difference Result 212458 states and 326818 transitions. [2021-12-15 11:13:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 98 [2021-12-15 11:13:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:42,769 INFO L225 Difference]: With dead ends: 212458 [2021-12-15 11:13:42,770 INFO L226 Difference]: Without dead ends: 162861 [2021-12-15 11:13:42,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:42,842 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 337 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:42,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 506 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162861 states. [2021-12-15 11:13:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162861 to 140793. [2021-12-15 11:13:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140793 states, 140792 states have (on average 1.53378743110404) internal successors, (215945), 140792 states have internal predecessors, (215945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140793 states to 140793 states and 215945 transitions. [2021-12-15 11:13:47,771 INFO L78 Accepts]: Start accepts. Automaton has 140793 states and 215945 transitions. Word has length 98 [2021-12-15 11:13:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:47,771 INFO L470 AbstractCegarLoop]: Abstraction has 140793 states and 215945 transitions. [2021-12-15 11:13:47,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 140793 states and 215945 transitions. [2021-12-15 11:13:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 11:13:47,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:47,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:47,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 11:13:47,773 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1188391860, now seen corresponding path program 1 times [2021-12-15 11:13:47,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:47,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821814830] [2021-12-15 11:13:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:47,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:13:47,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:47,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821814830] [2021-12-15 11:13:47,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821814830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:47,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:47,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:47,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926226490] [2021-12-15 11:13:47,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:47,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:47,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:47,800 INFO L87 Difference]: Start difference. First operand 140793 states and 215945 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)