./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.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 cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:59:52,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:59:52,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:59:52,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:59:52,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:59:52,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:59:52,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:59:52,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:59:52,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:59:52,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:59:52,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:59:52,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:59:52,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:59:52,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:59:52,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:59:52,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:59:52,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:59:52,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:59:52,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:59:52,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:59:52,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:59:52,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:59:52,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:59:52,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:59:52,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:59:52,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:59:52,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:59:52,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:59:52,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:59:52,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:59:52,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:59:52,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:59:52,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:59:52,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:59:52,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:59:52,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:59:52,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:59:52,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:59:52,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:59:52,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:59:52,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:59:52,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:59:52,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:59:52,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:59:52,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:59:52,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:59:52,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:59:52,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:59:52,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:59:52,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:59:52,831 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:59:52,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:59:52,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:59:52,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:59:52,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:59:52,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:59:52,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:59:52,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:59:52,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:59:52,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:59:52,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:59:52,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:59:52,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:59:52,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:59:52,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:59:52,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:59:52,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:59:52,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:59:52,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:59:52,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:59:52,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:59:52,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 [2021-12-15 21:59:53,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:59:53,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:59:53,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:59:53,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:59:53,084 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:59:53,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-12-15 21:59:53,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e66749519/5a115aa156c94311ad8c2fd24c0f8eb6/FLAG589513a10 [2021-12-15 21:59:53,614 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:59:53,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-12-15 21:59:53,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e66749519/5a115aa156c94311ad8c2fd24c0f8eb6/FLAG589513a10 [2021-12-15 21:59:53,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e66749519/5a115aa156c94311ad8c2fd24c0f8eb6 [2021-12-15 21:59:53,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:59:53,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:59:53,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:59:53,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:59:53,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:59:53,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:53" (1/1) ... [2021-12-15 21:59:53,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e6a01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:53, skipping insertion in model container [2021-12-15 21:59:53,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:53" (1/1) ... [2021-12-15 21:59:53,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:59:54,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:59:54,372 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/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-12-15 21:59:54,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:59:54,405 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:59:54,482 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/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-12-15 21:59:54,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:59:54,499 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:59:54,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54 WrapperNode [2021-12-15 21:59:54,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:59:54,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:59:54,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:59:54,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:59:54,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,578 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-12-15 21:59:54,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:59:54,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:59:54,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:59:54,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:59:54,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:59:54,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:59:54,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:59:54,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:59:54,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (1/1) ... [2021-12-15 21:59:54,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:59:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:59:54,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:59:54,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:59:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:59:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:59:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:59:54,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:59:54,940 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:59:54,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:59:54,964 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:59:57,820 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-12-15 21:59:57,821 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-12-15 21:59:57,821 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:59:57,829 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:59:57,830 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 21:59:57,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:57 BoogieIcfgContainer [2021-12-15 21:59:57,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:59:57,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:59:57,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:59:57,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:59:57,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:59:53" (1/3) ... [2021-12-15 21:59:57,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19afa33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:57, skipping insertion in model container [2021-12-15 21:59:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:54" (2/3) ... [2021-12-15 21:59:57,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19afa33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:57, skipping insertion in model container [2021-12-15 21:59:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:57" (3/3) ... [2021-12-15 21:59:57,839 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-1.c [2021-12-15 21:59:57,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:59:57,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:59:57,880 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:59:57,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:59:57,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:59:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:59:57,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:57,918 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] [2021-12-15 21:59:57,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-12-15 21:59:57,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727426781] [2021-12-15 21:59:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:57,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:59:58,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:58,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727426781] [2021-12-15 21:59:58,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727426781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:58,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:58,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:58,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688305191] [2021-12-15 21:59:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:58,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:58,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:58,561 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:00,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:01,048 INFO L93 Difference]: Finished difference Result 360 states and 608 transitions. [2021-12-15 22:00:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-15 22:00:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:01,061 INFO L225 Difference]: With dead ends: 360 [2021-12-15 22:00:01,062 INFO L226 Difference]: Without dead ends: 205 [2021-12-15 22:00:01,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:01,077 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:01,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 378 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:00:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-15 22:00:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-12-15 22:00:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5629629629629629) internal successors, (211), 135 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 211 transitions. [2021-12-15 22:00:01,135 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 211 transitions. Word has length 24 [2021-12-15 22:00:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:01,140 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 211 transitions. [2021-12-15 22:00:01,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 211 transitions. [2021-12-15 22:00:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 22:00:01,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:01,142 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] [2021-12-15 22:00:01,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:00:01,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2051408280, now seen corresponding path program 1 times [2021-12-15 22:00:01,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040787542] [2021-12-15 22:00:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:01,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:00:01,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040787542] [2021-12-15 22:00:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040787542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:01,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:01,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767354390] [2021-12-15 22:00:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:01,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:01,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:01,439 INFO L87 Difference]: Start difference. First operand 136 states and 211 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:03,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:03,654 INFO L93 Difference]: Finished difference Result 269 states and 416 transitions. [2021-12-15 22:00:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 22:00:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:03,657 INFO L225 Difference]: With dead ends: 269 [2021-12-15 22:00:03,657 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 22:00:03,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:03,659 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 7 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:03,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:00:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 22:00:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-15 22:00:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2021-12-15 22:00:03,677 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 25 [2021-12-15 22:00:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:03,678 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2021-12-15 22:00:03,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2021-12-15 22:00:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 22:00:03,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:03,685 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:00:03,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:00:03,685 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 992174912, now seen corresponding path program 1 times [2021-12-15 22:00:03,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:03,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579119710] [2021-12-15 22:00:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:03,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 22:00:03,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579119710] [2021-12-15 22:00:03,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579119710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:03,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:03,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:00:03,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756608653] [2021-12-15 22:00:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:03,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:00:03,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:00:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:00:03,969 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:04,019 INFO L93 Difference]: Finished difference Result 392 states and 608 transitions. [2021-12-15 22:00:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:00:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 22:00:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:04,024 INFO L225 Difference]: With dead ends: 392 [2021-12-15 22:00:04,024 INFO L226 Difference]: Without dead ends: 263 [2021-12-15 22:00:04,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:00:04,031 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 122 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:04,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 311 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 22:00:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-15 22:00:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-15 22:00:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.5381679389312977) internal successors, (403), 262 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 403 transitions. [2021-12-15 22:00:04,054 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 403 transitions. Word has length 39 [2021-12-15 22:00:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:04,054 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 403 transitions. [2021-12-15 22:00:04,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 403 transitions. [2021-12-15 22:00:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 22:00:04,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:04,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-15 22:00:04,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:00:04,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 834080616, now seen corresponding path program 1 times [2021-12-15 22:00:04,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618407612] [2021-12-15 22:00:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:04,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 22:00:04,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618407612] [2021-12-15 22:00:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618407612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:04,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:04,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:00:04,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56998631] [2021-12-15 22:00:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:04,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:00:04,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:00:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:00:04,305 INFO L87 Difference]: Start difference. First operand 263 states and 403 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:06,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:06,358 INFO L93 Difference]: Finished difference Result 516 states and 798 transitions. [2021-12-15 22:00:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:00:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 54 [2021-12-15 22:00:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:06,361 INFO L225 Difference]: With dead ends: 516 [2021-12-15 22:00:06,361 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 22:00:06,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:00:06,363 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 123 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:06,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:00:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 22:00:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-12-15 22:00:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5336787564766838) internal successors, (592), 386 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 592 transitions. [2021-12-15 22:00:06,379 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 592 transitions. Word has length 54 [2021-12-15 22:00:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:06,380 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 592 transitions. [2021-12-15 22:00:06,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 592 transitions. [2021-12-15 22:00:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 22:00:06,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:06,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-15 22:00:06,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:00:06,384 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -114315255, now seen corresponding path program 1 times [2021-12-15 22:00:06,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553300084] [2021-12-15 22:00:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:06,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:06,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:06,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553300084] [2021-12-15 22:00:06,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553300084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:06,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:06,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:06,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495489402] [2021-12-15 22:00:06,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:06,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:06,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:06,588 INFO L87 Difference]: Start difference. First operand 387 states and 592 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:08,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:10,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:10,983 INFO L93 Difference]: Finished difference Result 941 states and 1438 transitions. [2021-12-15 22:00:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 22:00:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:10,987 INFO L225 Difference]: With dead ends: 941 [2021-12-15 22:00:10,987 INFO L226 Difference]: Without dead ends: 564 [2021-12-15 22:00:10,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:10,989 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 91 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:10,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 22:00:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-15 22:00:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 439. [2021-12-15 22:00:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2021-12-15 22:00:11,003 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 72 [2021-12-15 22:00:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:11,003 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2021-12-15 22:00:11,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2021-12-15 22:00:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 22:00:11,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:11,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-15 22:00:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:00:11,007 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 26233355, now seen corresponding path program 1 times [2021-12-15 22:00:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:11,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193514767] [2021-12-15 22:00:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:11,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:11,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193514767] [2021-12-15 22:00:11,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193514767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:11,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:11,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:11,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700537046] [2021-12-15 22:00:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:11,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:11,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:11,234 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:13,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:13,592 INFO L93 Difference]: Finished difference Result 1139 states and 1753 transitions. [2021-12-15 22:00:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 22:00:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:13,605 INFO L225 Difference]: With dead ends: 1139 [2021-12-15 22:00:13,605 INFO L226 Difference]: Without dead ends: 710 [2021-12-15 22:00:13,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:13,608 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:13,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-15 22:00:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 462. [2021-12-15 22:00:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5704989154013016) internal successors, (724), 461 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2021-12-15 22:00:13,627 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 72 [2021-12-15 22:00:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:13,629 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2021-12-15 22:00:13,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2021-12-15 22:00:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 22:00:13,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:13,631 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-15 22:00:13,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:00:13,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1848863885, now seen corresponding path program 1 times [2021-12-15 22:00:13,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980415302] [2021-12-15 22:00:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:13,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:13,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980415302] [2021-12-15 22:00:13,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980415302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:13,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:13,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:13,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992839384] [2021-12-15 22:00:13,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:13,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:13,906 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:15,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:17,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:18,274 INFO L93 Difference]: Finished difference Result 1091 states and 1700 transitions. [2021-12-15 22:00:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 92 [2021-12-15 22:00:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:18,278 INFO L225 Difference]: With dead ends: 1091 [2021-12-15 22:00:18,278 INFO L226 Difference]: Without dead ends: 639 [2021-12-15 22:00:18,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:18,279 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 93 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:18,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-15 22:00:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 508. [2021-12-15 22:00:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.581854043392505) internal successors, (802), 507 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 802 transitions. [2021-12-15 22:00:18,293 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 802 transitions. Word has length 92 [2021-12-15 22:00:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 802 transitions. [2021-12-15 22:00:18,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 802 transitions. [2021-12-15 22:00:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 22:00:18,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:18,297 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-15 22:00:18,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:00:18,297 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1552617073, now seen corresponding path program 1 times [2021-12-15 22:00:18,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047462805] [2021-12-15 22:00:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:18,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 22:00:18,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047462805] [2021-12-15 22:00:18,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047462805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:18,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:18,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:18,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227201884] [2021-12-15 22:00:18,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:18,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:18,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:18,530 INFO L87 Difference]: Start difference. First operand 508 states and 802 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:20,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:22,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:22,824 INFO L93 Difference]: Finished difference Result 1091 states and 1717 transitions. [2021-12-15 22:00:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 92 [2021-12-15 22:00:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:22,831 INFO L225 Difference]: With dead ends: 1091 [2021-12-15 22:00:22,832 INFO L226 Difference]: Without dead ends: 593 [2021-12-15 22:00:22,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:22,833 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:22,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-15 22:00:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 548. [2021-12-15 22:00:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5904936014625228) internal successors, (870), 547 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 870 transitions. [2021-12-15 22:00:22,847 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 870 transitions. Word has length 92 [2021-12-15 22:00:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:22,847 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 870 transitions. [2021-12-15 22:00:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 870 transitions. [2021-12-15 22:00:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 22:00:22,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:22,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 22:00:22,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:00:22,854 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1859686006, now seen corresponding path program 1 times [2021-12-15 22:00:22,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:22,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374193731] [2021-12-15 22:00:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:22,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:23,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374193731] [2021-12-15 22:00:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374193731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:23,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:23,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:23,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391151389] [2021-12-15 22:00:23,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:23,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:23,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:23,074 INFO L87 Difference]: Start difference. First operand 548 states and 870 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:25,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:27,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:27,435 INFO L93 Difference]: Finished difference Result 1211 states and 1905 transitions. [2021-12-15 22:00:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 93 [2021-12-15 22:00:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:27,438 INFO L225 Difference]: With dead ends: 1211 [2021-12-15 22:00:27,438 INFO L226 Difference]: Without dead ends: 673 [2021-12-15 22:00:27,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:27,440 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 88 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:27,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 542 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-15 22:00:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 550. [2021-12-15 22:00:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5883424408014573) internal successors, (872), 549 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 872 transitions. [2021-12-15 22:00:27,453 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 872 transitions. Word has length 93 [2021-12-15 22:00:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:27,454 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 872 transitions. [2021-12-15 22:00:27,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 872 transitions. [2021-12-15 22:00:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:00:27,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:27,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:27,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:00:27,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash 500641909, now seen corresponding path program 2 times [2021-12-15 22:00:27,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:27,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590378918] [2021-12-15 22:00:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:27,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:27,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590378918] [2021-12-15 22:00:27,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590378918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:27,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:27,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:27,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636263795] [2021-12-15 22:00:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:27,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:27,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:27,668 INFO L87 Difference]: Start difference. First operand 550 states and 872 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:29,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:31,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:31,974 INFO L93 Difference]: Finished difference Result 1283 states and 1999 transitions. [2021-12-15 22:00:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 106 [2021-12-15 22:00:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:31,979 INFO L225 Difference]: With dead ends: 1283 [2021-12-15 22:00:31,979 INFO L226 Difference]: Without dead ends: 743 [2021-12-15 22:00:31,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:31,980 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 112 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:31,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-12-15 22:00:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 550. [2021-12-15 22:00:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.570127504553734) internal successors, (862), 549 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 862 transitions. [2021-12-15 22:00:31,997 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 862 transitions. Word has length 106 [2021-12-15 22:00:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:31,997 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 862 transitions. [2021-12-15 22:00:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 862 transitions. [2021-12-15 22:00:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:00:31,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:31,999 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:32,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:00:32,000 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1117113491, now seen corresponding path program 1 times [2021-12-15 22:00:32,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:32,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362350416] [2021-12-15 22:00:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:32,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362350416] [2021-12-15 22:00:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362350416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:32,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:32,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:32,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585440310] [2021-12-15 22:00:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:32,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:32,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:32,232 INFO L87 Difference]: Start difference. First operand 550 states and 862 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:34,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:36,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:36,527 INFO L93 Difference]: Finished difference Result 1211 states and 1883 transitions. [2021-12-15 22:00:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 106 [2021-12-15 22:00:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:36,529 INFO L225 Difference]: With dead ends: 1211 [2021-12-15 22:00:36,529 INFO L226 Difference]: Without dead ends: 671 [2021-12-15 22:00:36,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:36,531 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:36,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 538 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-15 22:00:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 550. [2021-12-15 22:00:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5664845173041895) internal successors, (860), 549 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-12-15 22:00:36,542 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 106 [2021-12-15 22:00:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:36,543 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-12-15 22:00:36,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-12-15 22:00:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:00:36,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:36,545 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:36,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:00:36,545 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1677813269, now seen corresponding path program 1 times [2021-12-15 22:00:36,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502365302] [2021-12-15 22:00:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:36,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:36,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502365302] [2021-12-15 22:00:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502365302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:36,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:36,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:36,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327971634] [2021-12-15 22:00:36,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:36,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:36,766 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:38,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:39,053 INFO L93 Difference]: Finished difference Result 1284 states and 1976 transitions. [2021-12-15 22:00:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 106 [2021-12-15 22:00:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:39,056 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 22:00:39,056 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 22:00:39,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:39,057 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 119 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:39,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 22:00:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 22:00:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5519125683060109) internal successors, (852), 549 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 852 transitions. [2021-12-15 22:00:39,071 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 852 transitions. Word has length 106 [2021-12-15 22:00:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:39,071 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 852 transitions. [2021-12-15 22:00:39,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 852 transitions. [2021-12-15 22:00:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 22:00:39,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:39,073 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:39,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:00:39,074 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash -602992740, now seen corresponding path program 1 times [2021-12-15 22:00:39,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880763269] [2021-12-15 22:00:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:39,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:39,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880763269] [2021-12-15 22:00:39,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880763269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:39,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:39,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:39,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894504769] [2021-12-15 22:00:39,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:39,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:39,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:39,269 INFO L87 Difference]: Start difference. First operand 550 states and 852 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:41,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:41,562 INFO L93 Difference]: Finished difference Result 1284 states and 1960 transitions. [2021-12-15 22:00:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 22:00:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:41,565 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 22:00:41,565 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 22:00:41,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:41,567 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:41,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 290 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 22:00:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 22:00:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5336976320582878) internal successors, (842), 549 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 842 transitions. [2021-12-15 22:00:41,582 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 842 transitions. Word has length 107 [2021-12-15 22:00:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 842 transitions. [2021-12-15 22:00:41,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 842 transitions. [2021-12-15 22:00:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 22:00:41,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:41,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-15 22:00:41,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:00:41,585 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1332849040, now seen corresponding path program 1 times [2021-12-15 22:00:41,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917534504] [2021-12-15 22:00:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:41,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:41,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917534504] [2021-12-15 22:00:41,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917534504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:41,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:41,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:41,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262009469] [2021-12-15 22:00:41,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:41,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:41,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:41,795 INFO L87 Difference]: Start difference. First operand 550 states and 842 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:43,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:44,074 INFO L93 Difference]: Finished difference Result 1365 states and 2066 transitions. [2021-12-15 22:00:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 22:00:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:44,077 INFO L225 Difference]: With dead ends: 1365 [2021-12-15 22:00:44,077 INFO L226 Difference]: Without dead ends: 825 [2021-12-15 22:00:44,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:44,079 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:44,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-15 22:00:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 664. [2021-12-15 22:00:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.555052790346908) internal successors, (1031), 663 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1031 transitions. [2021-12-15 22:00:44,093 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1031 transitions. Word has length 107 [2021-12-15 22:00:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:44,093 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1031 transitions. [2021-12-15 22:00:44,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1031 transitions. [2021-12-15 22:00:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:44,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:44,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:44,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:00:44,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:44,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1015692680, now seen corresponding path program 1 times [2021-12-15 22:00:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936505786] [2021-12-15 22:00:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:44,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:44,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936505786] [2021-12-15 22:00:44,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936505786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:44,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:44,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:44,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584218496] [2021-12-15 22:00:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:44,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:44,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:44,277 INFO L87 Difference]: Start difference. First operand 664 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:46,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:48,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:48,638 INFO L93 Difference]: Finished difference Result 1439 states and 2219 transitions. [2021-12-15 22:00:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:48,642 INFO L225 Difference]: With dead ends: 1439 [2021-12-15 22:00:48,642 INFO L226 Difference]: Without dead ends: 785 [2021-12-15 22:00:48,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:48,643 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 92 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:48,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 532 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-15 22:00:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 664. [2021-12-15 22:00:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.5520361990950227) internal successors, (1029), 663 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1029 transitions. [2021-12-15 22:00:48,679 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1029 transitions. Word has length 108 [2021-12-15 22:00:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:48,680 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1029 transitions. [2021-12-15 22:00:48,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1029 transitions. [2021-12-15 22:00:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:48,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:48,682 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:48,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:00:48,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -805941339, now seen corresponding path program 1 times [2021-12-15 22:00:48,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896127070] [2021-12-15 22:00:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:48,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:48,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896127070] [2021-12-15 22:00:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896127070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:48,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:48,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196309080] [2021-12-15 22:00:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:48,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:48,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:48,858 INFO L87 Difference]: Start difference. First operand 664 states and 1029 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:50,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:51,226 INFO L93 Difference]: Finished difference Result 1391 states and 2142 transitions. [2021-12-15 22:00:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:51,230 INFO L225 Difference]: With dead ends: 1391 [2021-12-15 22:00:51,231 INFO L226 Difference]: Without dead ends: 966 [2021-12-15 22:00:51,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:51,232 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 113 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:51,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 488 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-15 22:00:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 712. [2021-12-15 22:00:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.530239099859353) internal successors, (1088), 711 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1088 transitions. [2021-12-15 22:00:51,251 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1088 transitions. Word has length 108 [2021-12-15 22:00:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:51,252 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1088 transitions. [2021-12-15 22:00:51,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1088 transitions. [2021-12-15 22:00:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:51,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:51,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:51,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:00:51,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -82572025, now seen corresponding path program 1 times [2021-12-15 22:00:51,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:51,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011548719] [2021-12-15 22:00:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:51,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:51,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:51,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011548719] [2021-12-15 22:00:51,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011548719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:51,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:51,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:51,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947184102] [2021-12-15 22:00:51,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:51,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:51,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:51,433 INFO L87 Difference]: Start difference. First operand 712 states and 1088 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:53,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:55,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:55,783 INFO L93 Difference]: Finished difference Result 1531 states and 2329 transitions. [2021-12-15 22:00:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:55,786 INFO L225 Difference]: With dead ends: 1531 [2021-12-15 22:00:55,786 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 22:00:55,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:55,788 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 66 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:55,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 526 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 22:00:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 740. [2021-12-15 22:00:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.537212449255751) internal successors, (1136), 739 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1136 transitions. [2021-12-15 22:00:55,804 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1136 transitions. Word has length 108 [2021-12-15 22:00:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1136 transitions. [2021-12-15 22:00:55,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1136 transitions. [2021-12-15 22:00:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:55,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:55,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:00:55,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 803875412, now seen corresponding path program 1 times [2021-12-15 22:00:55,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475167200] [2021-12-15 22:00:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:55,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:56,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:56,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475167200] [2021-12-15 22:00:56,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475167200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:56,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:56,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314155794] [2021-12-15 22:00:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:56,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:56,002 INFO L87 Difference]: Start difference. First operand 740 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:58,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:58,304 INFO L93 Difference]: Finished difference Result 1664 states and 2528 transitions. [2021-12-15 22:00:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:58,308 INFO L225 Difference]: With dead ends: 1664 [2021-12-15 22:00:58,308 INFO L226 Difference]: Without dead ends: 934 [2021-12-15 22:00:58,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:58,310 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 91 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:58,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-12-15 22:00:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 779. [2021-12-15 22:00:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 1.556555269922879) internal successors, (1211), 778 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1211 transitions. [2021-12-15 22:00:58,329 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1211 transitions. Word has length 108 [2021-12-15 22:00:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:58,329 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1211 transitions. [2021-12-15 22:00:58,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1211 transitions. [2021-12-15 22:00:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:58,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:58,332 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:58,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:00:58,332 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash 945881978, now seen corresponding path program 1 times [2021-12-15 22:00:58,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188861038] [2021-12-15 22:00:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:58,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:58,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:58,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188861038] [2021-12-15 22:00:58,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188861038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:58,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:58,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:58,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149036630] [2021-12-15 22:00:58,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:58,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:58,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:58,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:58,513 INFO L87 Difference]: Start difference. First operand 779 states and 1211 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)