./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label55.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 b72ce2b63fc45ad9e7a0a19d4e53676fd1965a82647477e906aa1505ccdd455f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:30:47,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:30:47,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:30:47,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:30:47,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:30:47,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:30:47,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:30:47,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:30:47,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:30:47,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:30:47,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:30:47,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:30:47,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:30:47,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:30:47,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:30:47,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:30:47,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:30:47,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:30:47,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:30:47,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:30:47,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:30:47,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:30:47,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:30:47,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:30:47,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:30:47,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:30:47,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:30:47,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:30:47,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:30:47,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:30:47,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:30:47,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:30:47,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:30:47,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:30:47,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:30:47,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:30:47,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:30:47,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:30:47,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:30:47,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:30:47,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:30:47,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:30:47,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:30:47,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:30:47,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:30:47,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:30:47,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:30:47,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:30:47,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:30:47,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:30:47,868 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:30:47,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:30:47,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:30:47,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:30:47,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:30:47,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:30:47,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:30:47,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:30:47,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:30:47,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:30:47,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:30:47,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:30:47,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:30:47,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:30:47,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:30:47,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:30:47,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:30:47,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:30:47,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:30:47,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:30:47,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:30:47,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b72ce2b63fc45ad9e7a0a19d4e53676fd1965a82647477e906aa1505ccdd455f [2021-12-22 09:30:48,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:30:48,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:30:48,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:30:48,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:30:48,115 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:30:48,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label55.c [2021-12-22 09:30:48,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c595f52e/b01669dd673b454985bc3d5c6fedbd02/FLAG01c9297ee [2021-12-22 09:30:48,630 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:30:48,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label55.c [2021-12-22 09:30:48,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c595f52e/b01669dd673b454985bc3d5c6fedbd02/FLAG01c9297ee [2021-12-22 09:30:48,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c595f52e/b01669dd673b454985bc3d5c6fedbd02 [2021-12-22 09:30:48,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:30:48,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:30:48,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:30:48,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:30:48,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:30:48,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:30:48" (1/1) ... [2021-12-22 09:30:48,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713ecc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:48, skipping insertion in model container [2021-12-22 09:30:48,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:30:48" (1/1) ... [2021-12-22 09:30:48,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:30:48,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:30:49,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label55.c[6938,6951] [2021-12-22 09:30:49,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:30:49,433 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:30:49,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label55.c[6938,6951] [2021-12-22 09:30:49,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:30:49,587 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:30:49,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49 WrapperNode [2021-12-22 09:30:49,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:30:49,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:30:49,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:30:49,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:30:49,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,789 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:30:49,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:30:49,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:30:49,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:30:49,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:30:49,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:30:49,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:30:49,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:30:49,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:30:49,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (1/1) ... [2021-12-22 09:30:49,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:30:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:49,966 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) [2021-12-22 09:30:50,037 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 [2021-12-22 09:30:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:30:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:30:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:30:50,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:30:50,098 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:30:50,099 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:30:51,981 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:30:51,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:30:51,987 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:30:51,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:30:51 BoogieIcfgContainer [2021-12-22 09:30:51,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:30:51,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:30:51,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:30:51,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:30:51,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:30:48" (1/3) ... [2021-12-22 09:30:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d0a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:30:51, skipping insertion in model container [2021-12-22 09:30:51,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:30:49" (2/3) ... [2021-12-22 09:30:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301d0a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:30:51, skipping insertion in model container [2021-12-22 09:30:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:30:51" (3/3) ... [2021-12-22 09:30:51,994 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2021-12-22 09:30:51,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:30:51,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:30:52,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:30:52,033 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 [2021-12-22 09:30:52,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:30:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 09:30:52,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:52,059 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] [2021-12-22 09:30:52,059 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:52,063 INFO L85 PathProgramCache]: Analyzing trace with hash -66916295, now seen corresponding path program 1 times [2021-12-22 09:30:52,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:52,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930384029] [2021-12-22 09:30:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:52,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:52,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930384029] [2021-12-22 09:30:52,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930384029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:52,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:52,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:52,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623311055] [2021-12-22 09:30:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:52,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:52,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:52,309 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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) [2021-12-22 09:30:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:53,653 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-22 09:30:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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 [2021-12-22 09:30:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:53,672 INFO L225 Difference]: With dead ends: 1155 [2021-12-22 09:30:53,678 INFO L226 Difference]: Without dead ends: 667 [2021-12-22 09:30:53,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:53,702 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 287 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:53,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:30:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-22 09:30:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-22 09:30:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-22 09:30:53,805 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 57 [2021-12-22 09:30:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:53,823 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-22 09:30:53,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 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) [2021-12-22 09:30:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-22 09:30:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-22 09:30:53,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:53,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:53,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:30:53,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash -664289441, now seen corresponding path program 1 times [2021-12-22 09:30:53,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285157614] [2021-12-22 09:30:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:53,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:54,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:54,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285157614] [2021-12-22 09:30:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285157614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:54,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:54,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575838118] [2021-12-22 09:30:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:54,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:54,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:54,013 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:55,672 INFO L93 Difference]: Finished difference Result 1953 states and 2893 transitions. [2021-12-22 09:30:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-22 09:30:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:55,678 INFO L225 Difference]: With dead ends: 1953 [2021-12-22 09:30:55,678 INFO L226 Difference]: Without dead ends: 1290 [2021-12-22 09:30:55,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:55,680 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 257 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:55,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 325 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:30:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-12-22 09:30:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1282. [2021-12-22 09:30:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3989071038251366) internal successors, (1792), 1281 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1792 transitions. [2021-12-22 09:30:55,727 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1792 transitions. Word has length 132 [2021-12-22 09:30:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1792 transitions. [2021-12-22 09:30:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1792 transitions. [2021-12-22 09:30:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 09:30:55,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:55,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:55,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:30:55,732 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 22508777, now seen corresponding path program 1 times [2021-12-22 09:30:55,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:55,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096741047] [2021-12-22 09:30:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:55,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:30:55,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096741047] [2021-12-22 09:30:55,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096741047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:55,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:55,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:55,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999908445] [2021-12-22 09:30:55,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:55,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:55,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:55,816 INFO L87 Difference]: Start difference. First operand 1282 states and 1792 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:57,417 INFO L93 Difference]: Finished difference Result 3764 states and 5263 transitions. [2021-12-22 09:30:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-22 09:30:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:57,424 INFO L225 Difference]: With dead ends: 3764 [2021-12-22 09:30:57,424 INFO L226 Difference]: Without dead ends: 2484 [2021-12-22 09:30:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:57,433 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:30:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-12-22 09:30:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2021-12-22 09:30:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2815222375057314) internal successors, (2795), 2181 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2795 transitions. [2021-12-22 09:30:57,512 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2795 transitions. Word has length 136 [2021-12-22 09:30:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2795 transitions. [2021-12-22 09:30:57,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2795 transitions. [2021-12-22 09:30:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-22 09:30:57,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:57,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:57,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:30:57,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1359144620, now seen corresponding path program 1 times [2021-12-22 09:30:57,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:57,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427697395] [2021-12-22 09:30:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:57,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:30:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427697395] [2021-12-22 09:30:57,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427697395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:57,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:57,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789659775] [2021-12-22 09:30:57,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:57,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:57,617 INFO L87 Difference]: Start difference. First operand 2182 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:58,750 INFO L93 Difference]: Finished difference Result 6166 states and 7961 transitions. [2021-12-22 09:30:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 227 [2021-12-22 09:30:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:58,762 INFO L225 Difference]: With dead ends: 6166 [2021-12-22 09:30:58,763 INFO L226 Difference]: Without dead ends: 3986 [2021-12-22 09:30:58,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:58,771 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:58,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:30:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-22 09:30:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2021-12-22 09:30:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2200488997555012) internal successors, (4491), 3681 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4491 transitions. [2021-12-22 09:30:58,822 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4491 transitions. Word has length 227 [2021-12-22 09:30:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:58,823 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4491 transitions. [2021-12-22 09:30:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:30:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4491 transitions. [2021-12-22 09:30:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-22 09:30:58,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:58,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:58,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:30:58,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -764479700, now seen corresponding path program 1 times [2021-12-22 09:30:58,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:58,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148168200] [2021-12-22 09:30:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:58,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 09:30:58,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148168200] [2021-12-22 09:30:58,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148168200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:58,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:58,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:30:58,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844051716] [2021-12-22 09:30:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:58,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:30:58,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:30:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:30:58,977 INFO L87 Difference]: Start difference. First operand 3682 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:00,088 INFO L93 Difference]: Finished difference Result 7661 states and 9291 transitions. [2021-12-22 09:31:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 329 [2021-12-22 09:31:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:00,113 INFO L225 Difference]: With dead ends: 7661 [2021-12-22 09:31:00,113 INFO L226 Difference]: Without dead ends: 3981 [2021-12-22 09:31:00,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:00,117 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:31:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-12-22 09:31:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2021-12-22 09:31:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2050251256281408) internal successors, (4796), 3980 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4796 transitions. [2021-12-22 09:31:00,162 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4796 transitions. Word has length 329 [2021-12-22 09:31:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4796 transitions. [2021-12-22 09:31:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4796 transitions. [2021-12-22 09:31:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-22 09:31:00,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:00,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:00,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:31:00,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1396325859, now seen corresponding path program 1 times [2021-12-22 09:31:00,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:00,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920076375] [2021-12-22 09:31:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:00,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:31:00,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920076375] [2021-12-22 09:31:00,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920076375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:00,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:00,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:00,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036203985] [2021-12-22 09:31:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:00,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:00,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:00,353 INFO L87 Difference]: Start difference. First operand 3981 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:01,696 INFO L93 Difference]: Finished difference Result 9465 states and 11674 transitions. [2021-12-22 09:31:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 344 [2021-12-22 09:31:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:01,711 INFO L225 Difference]: With dead ends: 9465 [2021-12-22 09:31:01,711 INFO L226 Difference]: Without dead ends: 5785 [2021-12-22 09:31:01,716 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 [2021-12-22 09:31:01,716 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 259 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:01,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:31:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2021-12-22 09:31:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2021-12-22 09:31:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1675890695261155) internal successors, (6751), 5782 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6751 transitions. [2021-12-22 09:31:01,783 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6751 transitions. Word has length 344 [2021-12-22 09:31:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6751 transitions. [2021-12-22 09:31:01,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6751 transitions. [2021-12-22 09:31:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-22 09:31:01,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:01,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:31:01,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1074223962, now seen corresponding path program 1 times [2021-12-22 09:31:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649984550] [2021-12-22 09:31:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:01,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-22 09:31:01,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:01,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649984550] [2021-12-22 09:31:01,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649984550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:01,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:01,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:01,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394598041] [2021-12-22 09:31:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:01,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:01,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:01,944 INFO L87 Difference]: Start difference. First operand 5783 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:03,249 INFO L93 Difference]: Finished difference Result 13364 states and 15910 transitions. [2021-12-22 09:31:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 403 [2021-12-22 09:31:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:03,282 INFO L225 Difference]: With dead ends: 13364 [2021-12-22 09:31:03,282 INFO L226 Difference]: Without dead ends: 7882 [2021-12-22 09:31:03,288 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 [2021-12-22 09:31:03,289 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 270 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:03,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 635 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2021-12-22 09:31:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 7284. [2021-12-22 09:31:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7284 states, 7283 states have (on average 1.148702457778388) internal successors, (8366), 7283 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 8366 transitions. [2021-12-22 09:31:03,373 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 8366 transitions. Word has length 403 [2021-12-22 09:31:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:03,374 INFO L470 AbstractCegarLoop]: Abstraction has 7284 states and 8366 transitions. [2021-12-22 09:31:03,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 8366 transitions. [2021-12-22 09:31:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-12-22 09:31:03,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:03,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:03,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:31:03,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1496156917, now seen corresponding path program 1 times [2021-12-22 09:31:03,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783351392] [2021-12-22 09:31:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:03,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:31:03,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783351392] [2021-12-22 09:31:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783351392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:03,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:03,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:03,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900453802] [2021-12-22 09:31:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:03,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:03,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:03,542 INFO L87 Difference]: Start difference. First operand 7284 states and 8366 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:04,852 INFO L93 Difference]: Finished difference Result 16064 states and 18802 transitions. [2021-12-22 09:31:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 418 [2021-12-22 09:31:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:04,886 INFO L225 Difference]: With dead ends: 16064 [2021-12-22 09:31:04,886 INFO L226 Difference]: Without dead ends: 9081 [2021-12-22 09:31:04,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:04,894 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 334 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:04,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 156 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2021-12-22 09:31:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 9081. [2021-12-22 09:31:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 9080 states have (on average 1.1708149779735684) internal successors, (10631), 9080 states have internal predecessors, (10631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 10631 transitions. [2021-12-22 09:31:04,998 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 10631 transitions. Word has length 418 [2021-12-22 09:31:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:04,999 INFO L470 AbstractCegarLoop]: Abstraction has 9081 states and 10631 transitions. [2021-12-22 09:31:05,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 10631 transitions. [2021-12-22 09:31:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-12-22 09:31:05,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:05,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:05,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:31:05,008 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1494481576, now seen corresponding path program 1 times [2021-12-22 09:31:05,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:05,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226188575] [2021-12-22 09:31:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:05,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-22 09:31:05,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226188575] [2021-12-22 09:31:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226188575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:05,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:05,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322404734] [2021-12-22 09:31:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:05,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:05,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:05,157 INFO L87 Difference]: Start difference. First operand 9081 states and 10631 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:06,706 INFO L93 Difference]: Finished difference Result 22955 states and 26976 transitions. [2021-12-22 09:31:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 493 [2021-12-22 09:31:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:06,723 INFO L225 Difference]: With dead ends: 22955 [2021-12-22 09:31:06,723 INFO L226 Difference]: Without dead ends: 11484 [2021-12-22 09:31:06,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:06,733 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 285 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:06,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 680 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:31:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11484 states. [2021-12-22 09:31:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11484 to 11484. [2021-12-22 09:31:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 1.1284507532874684) internal successors, (12958), 11483 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 12958 transitions. [2021-12-22 09:31:06,829 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 12958 transitions. Word has length 493 [2021-12-22 09:31:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:06,830 INFO L470 AbstractCegarLoop]: Abstraction has 11484 states and 12958 transitions. [2021-12-22 09:31:06,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 12958 transitions. [2021-12-22 09:31:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-12-22 09:31:06,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:06,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:06,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:31:06,838 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 921753906, now seen corresponding path program 1 times [2021-12-22 09:31:06,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:06,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718653238] [2021-12-22 09:31:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:06,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 258 proven. 79 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 09:31:07,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:07,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718653238] [2021-12-22 09:31:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718653238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252986738] [2021-12-22 09:31:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:07,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:07,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:07,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:31:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:31:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-22 09:31:08,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:08,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252986738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:08,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:08,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:31:08,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021879671] [2021-12-22 09:31:08,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:08,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:08,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:08,015 INFO L87 Difference]: Start difference. First operand 11484 states and 12958 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:09,263 INFO L93 Difference]: Finished difference Result 25656 states and 29285 transitions. [2021-12-22 09:31:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 496 [2021-12-22 09:31:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:09,283 INFO L225 Difference]: With dead ends: 25656 [2021-12-22 09:31:09,283 INFO L226 Difference]: Without dead ends: 14473 [2021-12-22 09:31:09,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:09,293 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 365 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:09,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 451 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-12-22 09:31:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 14174. [2021-12-22 09:31:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14174 states, 14173 states have (on average 1.1343399421435123) internal successors, (16077), 14173 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14174 states to 14174 states and 16077 transitions. [2021-12-22 09:31:09,480 INFO L78 Accepts]: Start accepts. Automaton has 14174 states and 16077 transitions. Word has length 496 [2021-12-22 09:31:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:09,481 INFO L470 AbstractCegarLoop]: Abstraction has 14174 states and 16077 transitions. [2021-12-22 09:31:09,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14174 states and 16077 transitions. [2021-12-22 09:31:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-12-22 09:31:09,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:09,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:09,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 09:31:09,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 09:31:09,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash -536888608, now seen corresponding path program 1 times [2021-12-22 09:31:09,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:09,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887794479] [2021-12-22 09:31:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:09,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 270 proven. 79 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 09:31:09,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887794479] [2021-12-22 09:31:09,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887794479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:09,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761535015] [2021-12-22 09:31:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:09,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:09,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:09,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:31:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:31:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 09:31:10,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:10,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761535015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:10,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:10,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:31:10,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198573592] [2021-12-22 09:31:10,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:10,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:10,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:10,746 INFO L87 Difference]: Start difference. First operand 14174 states and 16077 transitions. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:11,811 INFO L93 Difference]: Finished difference Result 28051 states and 31856 transitions. [2021-12-22 09:31:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 503 [2021-12-22 09:31:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:11,846 INFO L225 Difference]: With dead ends: 28051 [2021-12-22 09:31:11,846 INFO L226 Difference]: Without dead ends: 14178 [2021-12-22 09:31:11,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:11,858 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 266 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:11,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 248 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:31:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14178 states. [2021-12-22 09:31:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14178 to 13575. [2021-12-22 09:31:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13575 states, 13574 states have (on average 1.1149992632974806) internal successors, (15135), 13574 states have internal predecessors, (15135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13575 states to 13575 states and 15135 transitions. [2021-12-22 09:31:11,987 INFO L78 Accepts]: Start accepts. Automaton has 13575 states and 15135 transitions. Word has length 503 [2021-12-22 09:31:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:11,987 INFO L470 AbstractCegarLoop]: Abstraction has 13575 states and 15135 transitions. [2021-12-22 09:31:11,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 13575 states and 15135 transitions. [2021-12-22 09:31:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-22 09:31:11,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:11,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:12,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 09:31:12,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 09:31:12,225 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1478191957, now seen corresponding path program 1 times [2021-12-22 09:31:12,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:12,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652135769] [2021-12-22 09:31:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:12,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 09:31:12,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652135769] [2021-12-22 09:31:12,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652135769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:12,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:12,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:12,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496462778] [2021-12-22 09:31:12,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:12,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:12,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:12,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:12,357 INFO L87 Difference]: Start difference. First operand 13575 states and 15135 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:13,697 INFO L93 Difference]: Finished difference Result 29540 states and 33128 transitions. [2021-12-22 09:31:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 508 [2021-12-22 09:31:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:13,712 INFO L225 Difference]: With dead ends: 29540 [2021-12-22 09:31:13,713 INFO L226 Difference]: Without dead ends: 16266 [2021-12-22 09:31:13,719 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 [2021-12-22 09:31:13,719 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 148 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:13,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 283 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16266 states. [2021-12-22 09:31:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16266 to 12373. [2021-12-22 09:31:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 1.117846750727449) internal successors, (13830), 12372 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 13830 transitions. [2021-12-22 09:31:13,835 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 13830 transitions. Word has length 508 [2021-12-22 09:31:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:13,836 INFO L470 AbstractCegarLoop]: Abstraction has 12373 states and 13830 transitions. [2021-12-22 09:31:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 13830 transitions. [2021-12-22 09:31:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-12-22 09:31:13,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:13,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:13,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:31:13,842 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1172702752, now seen corresponding path program 1 times [2021-12-22 09:31:13,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:13,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985996657] [2021-12-22 09:31:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:13,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 464 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-22 09:31:13,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:13,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985996657] [2021-12-22 09:31:13,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985996657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:13,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:13,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:13,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193930762] [2021-12-22 09:31:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:13,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:13,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:13,983 INFO L87 Difference]: Start difference. First operand 12373 states and 13830 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:15,383 INFO L93 Difference]: Finished difference Result 30143 states and 33904 transitions. [2021-12-22 09:31:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:15,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 548 [2021-12-22 09:31:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:15,403 INFO L225 Difference]: With dead ends: 30143 [2021-12-22 09:31:15,403 INFO L226 Difference]: Without dead ends: 18071 [2021-12-22 09:31:15,410 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 [2021-12-22 09:31:15,411 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 242 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:15,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 595 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18071 states. [2021-12-22 09:31:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18071 to 17161. [2021-12-22 09:31:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17161 states, 17160 states have (on average 1.1059440559440559) internal successors, (18978), 17160 states have internal predecessors, (18978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17161 states to 17161 states and 18978 transitions. [2021-12-22 09:31:15,595 INFO L78 Accepts]: Start accepts. Automaton has 17161 states and 18978 transitions. Word has length 548 [2021-12-22 09:31:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:15,595 INFO L470 AbstractCegarLoop]: Abstraction has 17161 states and 18978 transitions. [2021-12-22 09:31:15,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17161 states and 18978 transitions. [2021-12-22 09:31:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2021-12-22 09:31:15,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:15,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:15,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:31:15,606 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 579596335, now seen corresponding path program 1 times [2021-12-22 09:31:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:15,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691437115] [2021-12-22 09:31:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:15,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 383 proven. 271 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 09:31:15,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691437115] [2021-12-22 09:31:15,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691437115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224596895] [2021-12-22 09:31:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:15,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:15,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:31:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:31:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 464 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-22 09:31:16,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:16,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224596895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:16,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:16,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:31:16,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492156343] [2021-12-22 09:31:16,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:16,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:16,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:16,860 INFO L87 Difference]: Start difference. First operand 17161 states and 18978 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:18,069 INFO L93 Difference]: Finished difference Result 33725 states and 37344 transitions. [2021-12-22 09:31:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 603 [2021-12-22 09:31:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:18,086 INFO L225 Difference]: With dead ends: 33725 [2021-12-22 09:31:18,086 INFO L226 Difference]: Without dead ends: 16865 [2021-12-22 09:31:18,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:18,095 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 305 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:18,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 438 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:31:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16865 states. [2021-12-22 09:31:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16865 to 16859. [2021-12-22 09:31:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16859 states, 16858 states have (on average 1.0965713607782654) internal successors, (18486), 16858 states have internal predecessors, (18486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16859 states to 16859 states and 18486 transitions. [2021-12-22 09:31:18,225 INFO L78 Accepts]: Start accepts. Automaton has 16859 states and 18486 transitions. Word has length 603 [2021-12-22 09:31:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:18,225 INFO L470 AbstractCegarLoop]: Abstraction has 16859 states and 18486 transitions. [2021-12-22 09:31:18,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16859 states and 18486 transitions. [2021-12-22 09:31:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-22 09:31:18,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:18,233 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:18,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:18,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:18,448 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -347178889, now seen corresponding path program 1 times [2021-12-22 09:31:18,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405835698] [2021-12-22 09:31:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:18,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 634 proven. 39 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-22 09:31:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405835698] [2021-12-22 09:31:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405835698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078183534] [2021-12-22 09:31:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:18,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:18,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:31:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:31:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 634 proven. 39 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-22 09:31:19,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:31:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 634 proven. 39 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-22 09:31:20,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078183534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:31:20,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:31:20,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:31:20,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162548178] [2021-12-22 09:31:20,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:31:20,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:31:20,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:31:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:31:20,907 INFO L87 Difference]: Start difference. First operand 16859 states and 18486 transitions. Second operand has 9 states, 9 states have (on average 83.88888888888889) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:25,777 INFO L93 Difference]: Finished difference Result 41752 states and 45661 transitions. [2021-12-22 09:31:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:31:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.88888888888889) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 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 640 [2021-12-22 09:31:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:25,797 INFO L225 Difference]: With dead ends: 41752 [2021-12-22 09:31:25,797 INFO L226 Difference]: Without dead ends: 18954 [2021-12-22 09:31:25,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1289 GetRequests, 1274 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:31:25,809 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 2855 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5902 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2855 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 6425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 5902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:25,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2855 Valid, 260 Invalid, 6425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 5902 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-22 09:31:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18954 states. [2021-12-22 09:31:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18954 to 15063. [2021-12-22 09:31:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15063 states, 15062 states have (on average 1.0533793652901342) internal successors, (15866), 15062 states have internal predecessors, (15866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15063 states to 15063 states and 15866 transitions. [2021-12-22 09:31:25,946 INFO L78 Accepts]: Start accepts. Automaton has 15063 states and 15866 transitions. Word has length 640 [2021-12-22 09:31:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:25,946 INFO L470 AbstractCegarLoop]: Abstraction has 15063 states and 15866 transitions. [2021-12-22 09:31:25,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.88888888888889) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 15063 states and 15866 transitions. [2021-12-22 09:31:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-12-22 09:31:25,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:25,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:25,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:26,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 09:31:26,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1914023780, now seen corresponding path program 1 times [2021-12-22 09:31:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:26,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714516070] [2021-12-22 09:31:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:26,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-12-22 09:31:26,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714516070] [2021-12-22 09:31:26,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714516070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:26,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:26,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:26,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498336116] [2021-12-22 09:31:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:26,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:26,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:26,618 INFO L87 Difference]: Start difference. First operand 15063 states and 15866 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:27,594 INFO L93 Difference]: Finished difference Result 33411 states and 35265 transitions. [2021-12-22 09:31:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 658 [2021-12-22 09:31:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:27,611 INFO L225 Difference]: With dead ends: 33411 [2021-12-22 09:31:27,611 INFO L226 Difference]: Without dead ends: 18350 [2021-12-22 09:31:27,621 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 [2021-12-22 09:31:27,622 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 255 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:27,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 538 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18350 states. [2021-12-22 09:31:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18350 to 15348. [2021-12-22 09:31:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15348 states, 15347 states have (on average 1.0513455398449207) internal successors, (16135), 15347 states have internal predecessors, (16135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15348 states to 15348 states and 16135 transitions. [2021-12-22 09:31:27,778 INFO L78 Accepts]: Start accepts. Automaton has 15348 states and 16135 transitions. Word has length 658 [2021-12-22 09:31:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:27,779 INFO L470 AbstractCegarLoop]: Abstraction has 15348 states and 16135 transitions. [2021-12-22 09:31:27,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15348 states and 16135 transitions. [2021-12-22 09:31:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2021-12-22 09:31:27,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:27,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:27,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:31:27,798 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1275389892, now seen corresponding path program 1 times [2021-12-22 09:31:27,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122245772] [2021-12-22 09:31:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:27,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 09:31:28,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122245772] [2021-12-22 09:31:28,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122245772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:28,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:28,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:31:28,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152891952] [2021-12-22 09:31:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:28,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:31:28,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:31:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:31:28,183 INFO L87 Difference]: Start difference. First operand 15348 states and 16135 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:29,712 INFO L93 Difference]: Finished difference Result 34580 states and 36450 transitions. [2021-12-22 09:31:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:31:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 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 682 [2021-12-22 09:31:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:29,730 INFO L225 Difference]: With dead ends: 34580 [2021-12-22 09:31:29,730 INFO L226 Difference]: Without dead ends: 19234 [2021-12-22 09:31:29,737 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 [2021-12-22 09:31:29,739 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 639 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:29,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 440 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:31:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19234 states. [2021-12-22 09:31:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19234 to 18337. [2021-12-22 09:31:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 1.0457024432809774) internal successors, (19174), 18336 states have internal predecessors, (19174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 19174 transitions. [2021-12-22 09:31:29,890 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 19174 transitions. Word has length 682 [2021-12-22 09:31:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:29,890 INFO L470 AbstractCegarLoop]: Abstraction has 18337 states and 19174 transitions. [2021-12-22 09:31:29,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 19174 transitions. [2021-12-22 09:31:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-22 09:31:29,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:29,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:29,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:31:29,904 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -402468340, now seen corresponding path program 1 times [2021-12-22 09:31:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:29,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968312569] [2021-12-22 09:31:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:29,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 547 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-12-22 09:31:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968312569] [2021-12-22 09:31:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968312569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:30,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:30,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:30,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364918982] [2021-12-22 09:31:30,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:30,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:30,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:30,228 INFO L87 Difference]: Start difference. First operand 18337 states and 19174 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:31,120 INFO L93 Difference]: Finished difference Result 36669 states and 38352 transitions. [2021-12-22 09:31:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:31,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 713 [2021-12-22 09:31:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:31,136 INFO L225 Difference]: With dead ends: 36669 [2021-12-22 09:31:31,136 INFO L226 Difference]: Without dead ends: 18633 [2021-12-22 09:31:31,144 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 [2021-12-22 09:31:31,145 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 436 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:31,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 68 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:31:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18633 states. [2021-12-22 09:31:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18633 to 18333. [2021-12-22 09:31:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 1.0455487671830679) internal successors, (19167), 18332 states have internal predecessors, (19167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 19167 transitions. [2021-12-22 09:31:31,280 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 19167 transitions. Word has length 713 [2021-12-22 09:31:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 18333 states and 19167 transitions. [2021-12-22 09:31:31,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 19167 transitions. [2021-12-22 09:31:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2021-12-22 09:31:31,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:31,356 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:31,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 09:31:31,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1638431091, now seen corresponding path program 1 times [2021-12-22 09:31:31,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:31,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384799797] [2021-12-22 09:31:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:31,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 728 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-12-22 09:31:31,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384799797] [2021-12-22 09:31:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384799797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:31,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:31,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:31,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559277525] [2021-12-22 09:31:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:31,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:31,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:31,549 INFO L87 Difference]: Start difference. First operand 18333 states and 19167 transitions. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:32,472 INFO L93 Difference]: Finished difference Result 39053 states and 40884 transitions. [2021-12-22 09:31:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 784 [2021-12-22 09:31:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:32,492 INFO L225 Difference]: With dead ends: 39053 [2021-12-22 09:31:32,492 INFO L226 Difference]: Without dead ends: 21021 [2021-12-22 09:31:32,503 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 [2021-12-22 09:31:32,503 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 184 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:32,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 166 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:31:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21021 states. [2021-12-22 09:31:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21021 to 19825. [2021-12-22 09:31:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 1.0431799838579499) internal successors, (20680), 19824 states have internal predecessors, (20680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 20680 transitions. [2021-12-22 09:31:32,666 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 20680 transitions. Word has length 784 [2021-12-22 09:31:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 19825 states and 20680 transitions. [2021-12-22 09:31:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 20680 transitions. [2021-12-22 09:31:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2021-12-22 09:31:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:32,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:31:32,679 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash -523331930, now seen corresponding path program 1 times [2021-12-22 09:31:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:32,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739497331] [2021-12-22 09:31:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:32,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 749 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-12-22 09:31:32,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739497331] [2021-12-22 09:31:32,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739497331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:32,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:32,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:32,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810227054] [2021-12-22 09:31:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:32,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:32,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:32,992 INFO L87 Difference]: Start difference. First operand 19825 states and 20680 transitions. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:33,922 INFO L93 Difference]: Finished difference Result 42037 states and 43888 transitions. [2021-12-22 09:31:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 805 [2021-12-22 09:31:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:33,946 INFO L225 Difference]: With dead ends: 42037 [2021-12-22 09:31:33,947 INFO L226 Difference]: Without dead ends: 22214 [2021-12-22 09:31:33,958 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 [2021-12-22 09:31:33,959 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 164 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:33,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 459 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:31:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22214 states. [2021-12-22 09:31:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22214 to 17126. [2021-12-22 09:31:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 17125 states have (on average 1.0384817518248175) internal successors, (17784), 17125 states have internal predecessors, (17784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 17784 transitions. [2021-12-22 09:31:34,114 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 17784 transitions. Word has length 805 [2021-12-22 09:31:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:34,114 INFO L470 AbstractCegarLoop]: Abstraction has 17126 states and 17784 transitions. [2021-12-22 09:31:34,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 17784 transitions. [2021-12-22 09:31:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2021-12-22 09:31:34,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:34,125 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:34,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 09:31:34,125 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1479206236, now seen corresponding path program 1 times [2021-12-22 09:31:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:34,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522681698] [2021-12-22 09:31:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:34,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-12-22 09:31:34,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522681698] [2021-12-22 09:31:34,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522681698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:34,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:34,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:34,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41261933] [2021-12-22 09:31:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:34,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:34,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:34,322 INFO L87 Difference]: Start difference. First operand 17126 states and 17784 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:35,199 INFO L93 Difference]: Finished difference Result 36043 states and 37480 transitions. [2021-12-22 09:31:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 842 [2021-12-22 09:31:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:35,228 INFO L225 Difference]: With dead ends: 36043 [2021-12-22 09:31:35,235 INFO L226 Difference]: Without dead ends: 19218 [2021-12-22 09:31:35,246 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 [2021-12-22 09:31:35,246 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 311 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:35,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 503 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:31:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19218 states. [2021-12-22 09:31:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19218 to 18321. [2021-12-22 09:31:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18321 states, 18320 states have (on average 1.0375) internal successors, (19007), 18320 states have internal predecessors, (19007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18321 states to 18321 states and 19007 transitions. [2021-12-22 09:31:35,434 INFO L78 Accepts]: Start accepts. Automaton has 18321 states and 19007 transitions. Word has length 842 [2021-12-22 09:31:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:35,434 INFO L470 AbstractCegarLoop]: Abstraction has 18321 states and 19007 transitions. [2021-12-22 09:31:35,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 18321 states and 19007 transitions. [2021-12-22 09:31:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2021-12-22 09:31:35,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:35,448 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:35,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:31:35,448 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -537887034, now seen corresponding path program 1 times [2021-12-22 09:31:35,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:35,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049346187] [2021-12-22 09:31:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:35,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 629 proven. 269 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-22 09:31:35,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049346187] [2021-12-22 09:31:35,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049346187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504980426] [2021-12-22 09:31:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:35,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:35,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:35,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:35,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:31:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:31:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-12-22 09:31:36,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504980426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:36,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:36,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:31:36,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307828086] [2021-12-22 09:31:36,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:36,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:36,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:36,978 INFO L87 Difference]: Start difference. First operand 18321 states and 19007 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:37,967 INFO L93 Difference]: Finished difference Result 41144 states and 42673 transitions. [2021-12-22 09:31:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 863 [2021-12-22 09:31:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:38,087 INFO L225 Difference]: With dead ends: 41144 [2021-12-22 09:31:38,088 INFO L226 Difference]: Without dead ends: 22825 [2021-12-22 09:31:38,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:38,092 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 276 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:38,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 497 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22825 states. [2021-12-22 09:31:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22825 to 21323. [2021-12-22 09:31:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21323 states, 21322 states have (on average 1.0374261326329612) internal successors, (22120), 21322 states have internal predecessors, (22120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21323 states to 21323 states and 22120 transitions. [2021-12-22 09:31:38,256 INFO L78 Accepts]: Start accepts. Automaton has 21323 states and 22120 transitions. Word has length 863 [2021-12-22 09:31:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:38,257 INFO L470 AbstractCegarLoop]: Abstraction has 21323 states and 22120 transitions. [2021-12-22 09:31:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21323 states and 22120 transitions. [2021-12-22 09:31:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-12-22 09:31:38,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:38,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:38,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:38,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 09:31:38,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 943867835, now seen corresponding path program 1 times [2021-12-22 09:31:38,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:38,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188258192] [2021-12-22 09:31:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:38,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 703 proven. 269 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-22 09:31:38,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188258192] [2021-12-22 09:31:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188258192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026273710] [2021-12-22 09:31:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:38,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:38,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:31:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:31:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:31:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates...