./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_srvr.blast.14.i.cil-2.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 adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:41:40,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:41:40,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:41:40,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:41:40,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:41:40,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:41:40,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:41:40,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:41:40,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:41:40,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:41:40,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:41:40,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:41:40,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:41:40,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:41:40,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:41:40,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:41:40,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:41:40,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:41:40,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:41:40,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:41:40,782 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:41:40,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:41:40,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:41:40,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:41:40,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:41:40,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:41:40,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:41:40,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:41:40,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:41:40,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:41:40,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:41:40,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:41:40,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:41:40,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:41:40,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:41:40,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:41:40,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:41:40,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:41:40,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:41:40,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:41:40,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:41:40,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:41:40,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:41:40,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:41:40,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:41:40,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:41:40,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:41:40,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:41:40,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:41:40,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:41:40,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:41:40,825 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:41:40,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:41:40,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:41:40,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:41:40,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:41:40,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:41:40,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:41:40,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:41:40,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:41:40,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:41:40,828 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:41:40,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:41:40,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:41:40,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2022-07-13 11:41:41,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:41:41,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:41:41,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:41:41,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:41:41,045 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:41:41,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:41:41,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/852cb099c/f37eff4c2f1446bdb04431e51d0dd47d/FLAG2c5f8f5c2 [2022-07-13 11:41:41,520 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:41:41,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:41:41,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/852cb099c/f37eff4c2f1446bdb04431e51d0dd47d/FLAG2c5f8f5c2 [2022-07-13 11:41:41,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/852cb099c/f37eff4c2f1446bdb04431e51d0dd47d [2022-07-13 11:41:41,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:41:41,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:41:41,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:41:41,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:41:41,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:41:41,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:41:41" (1/1) ... [2022-07-13 11:41:41,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b015995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:41, skipping insertion in model container [2022-07-13 11:41:41,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:41:41" (1/1) ... [2022-07-13 11:41:41,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:41:41,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:41:42,205 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_srvr.blast.14.i.cil-2.c[76259,76272] [2022-07-13 11:41:42,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:41:42,225 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:41:42,316 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_srvr.blast.14.i.cil-2.c[76259,76272] [2022-07-13 11:41:42,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:41:42,339 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:41:42,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42 WrapperNode [2022-07-13 11:41:42,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:41:42,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:41:42,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:41:42,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:41:42,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,399 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 803 [2022-07-13 11:41:42,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:41:42,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:41:42,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:41:42,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:41:42,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:41:42,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:41:42,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:41:42,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:41:42,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (1/1) ... [2022-07-13 11:41:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:41:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:41:42,553 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) [2022-07-13 11:41:42,555 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 [2022-07-13 11:41:42,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:41:42,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:41:42,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:41:42,745 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:41:42,746 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:41:42,755 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:41:45,038 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-13 11:41:45,038 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-13 11:41:45,038 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:41:45,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:41:45,043 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:41:45,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:41:45 BoogieIcfgContainer [2022-07-13 11:41:45,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:41:45,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:41:45,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:41:45,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:41:45,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:41:41" (1/3) ... [2022-07-13 11:41:45,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2c997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:41:45, skipping insertion in model container [2022-07-13 11:41:45,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:41:42" (2/3) ... [2022-07-13 11:41:45,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2c997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:41:45, skipping insertion in model container [2022-07-13 11:41:45,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:41:45" (3/3) ... [2022-07-13 11:41:45,054 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:41:45,064 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:41:45,064 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:41:45,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:41:45,114 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@307f8699, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51360bb2 [2022-07-13 11:41:45,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:41:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:41:45,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:45,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:45,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2022-07-13 11:41:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:45,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064222859] [2022-07-13 11:41:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:45,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064222859] [2022-07-13 11:41:45,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064222859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:45,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:45,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612231268] [2022-07-13 11:41:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:45,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:45,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:45,571 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 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 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:46,323 INFO L93 Difference]: Finished difference Result 436 states and 746 transitions. [2022-07-13 11:41:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 11:41:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:46,332 INFO L225 Difference]: With dead ends: 436 [2022-07-13 11:41:46,333 INFO L226 Difference]: Without dead ends: 266 [2022-07-13 11:41:46,335 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:46,337 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 166 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:46,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 471 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:41:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-13 11:41:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 182. [2022-07-13 11:41:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.6187845303867403) internal successors, (293), 181 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 293 transitions. [2022-07-13 11:41:46,369 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 293 transitions. Word has length 44 [2022-07-13 11:41:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:46,369 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 293 transitions. [2022-07-13 11:41:46,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 293 transitions. [2022-07-13 11:41:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:41:46,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:46,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:41:46,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1831970003, now seen corresponding path program 1 times [2022-07-13 11:41:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:46,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635336028] [2022-07-13 11:41:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:46,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635336028] [2022-07-13 11:41:46,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635336028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:46,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:46,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536559467] [2022-07-13 11:41:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:46,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:46,510 INFO L87 Difference]: Start difference. First operand 182 states and 293 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:46,997 INFO L93 Difference]: Finished difference Result 382 states and 613 transitions. [2022-07-13 11:41:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-13 11:41:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:46,999 INFO L225 Difference]: With dead ends: 382 [2022-07-13 11:41:46,999 INFO L226 Difference]: Without dead ends: 210 [2022-07-13 11:41:47,000 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:47,001 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 22 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:47,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 499 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:41:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-13 11:41:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2022-07-13 11:41:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.625) internal successors, (312), 192 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 312 transitions. [2022-07-13 11:41:47,010 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 312 transitions. Word has length 45 [2022-07-13 11:41:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:47,012 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 312 transitions. [2022-07-13 11:41:47,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 312 transitions. [2022-07-13 11:41:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:41:47,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:47,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:41:47,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2074377750, now seen corresponding path program 1 times [2022-07-13 11:41:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094618666] [2022-07-13 11:41:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:47,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:47,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:47,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094618666] [2022-07-13 11:41:47,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094618666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:47,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:47,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:47,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145946580] [2022-07-13 11:41:47,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:47,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:47,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:47,136 INFO L87 Difference]: Start difference. First operand 193 states and 312 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:48,342 INFO L93 Difference]: Finished difference Result 527 states and 857 transitions. [2022-07-13 11:41:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 11:41:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:48,344 INFO L225 Difference]: With dead ends: 527 [2022-07-13 11:41:48,344 INFO L226 Difference]: Without dead ends: 355 [2022-07-13 11:41:48,345 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:48,346 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 155 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:48,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 668 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:41:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-13 11:41:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 225. [2022-07-13 11:41:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6205357142857142) internal successors, (363), 224 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 363 transitions. [2022-07-13 11:41:48,355 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 363 transitions. Word has length 58 [2022-07-13 11:41:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:48,356 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 363 transitions. [2022-07-13 11:41:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 363 transitions. [2022-07-13 11:41:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:41:48,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:48,357 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:48,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:41:48,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash -634430425, now seen corresponding path program 1 times [2022-07-13 11:41:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:48,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50638119] [2022-07-13 11:41:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:48,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50638119] [2022-07-13 11:41:48,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50638119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:48,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:48,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985156834] [2022-07-13 11:41:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:48,463 INFO L87 Difference]: Start difference. First operand 225 states and 363 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:49,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:41:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:50,134 INFO L93 Difference]: Finished difference Result 535 states and 860 transitions. [2022-07-13 11:41:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 11:41:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:50,136 INFO L225 Difference]: With dead ends: 535 [2022-07-13 11:41:50,136 INFO L226 Difference]: Without dead ends: 331 [2022-07-13 11:41:50,136 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:50,137 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 160 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:50,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 364 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 11:41:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-13 11:41:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 225. [2022-07-13 11:41:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6026785714285714) internal successors, (359), 224 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 359 transitions. [2022-07-13 11:41:50,144 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 359 transitions. Word has length 59 [2022-07-13 11:41:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:50,145 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 359 transitions. [2022-07-13 11:41:50,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 359 transitions. [2022-07-13 11:41:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:41:50,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:50,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:50,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:41:50,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1252473019, now seen corresponding path program 1 times [2022-07-13 11:41:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501692185] [2022-07-13 11:41:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501692185] [2022-07-13 11:41:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501692185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:50,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:50,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:50,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011125843] [2022-07-13 11:41:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:50,263 INFO L87 Difference]: Start difference. First operand 225 states and 359 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:52,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:41:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:52,384 INFO L93 Difference]: Finished difference Result 445 states and 707 transitions. [2022-07-13 11:41:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 11:41:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:52,386 INFO L225 Difference]: With dead ends: 445 [2022-07-13 11:41:52,386 INFO L226 Difference]: Without dead ends: 241 [2022-07-13 11:41:52,386 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:52,387 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 26 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:52,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 503 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:41:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-13 11:41:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2022-07-13 11:41:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5982142857142858) internal successors, (358), 224 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 358 transitions. [2022-07-13 11:41:52,393 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 358 transitions. Word has length 59 [2022-07-13 11:41:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:52,393 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 358 transitions. [2022-07-13 11:41:52,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 358 transitions. [2022-07-13 11:41:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:41:52,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:52,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:52,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:41:52,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 400356242, now seen corresponding path program 1 times [2022-07-13 11:41:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:52,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149779582] [2022-07-13 11:41:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:52,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:52,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149779582] [2022-07-13 11:41:52,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149779582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:52,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:52,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651512090] [2022-07-13 11:41:52,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:52,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:52,504 INFO L87 Difference]: Start difference. First operand 225 states and 358 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:53,534 INFO L93 Difference]: Finished difference Result 444 states and 705 transitions. [2022-07-13 11:41:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 11:41:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:53,536 INFO L225 Difference]: With dead ends: 444 [2022-07-13 11:41:53,536 INFO L226 Difference]: Without dead ends: 240 [2022-07-13 11:41:53,537 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:53,537 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 19 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 505 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 11:41:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-13 11:41:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 225. [2022-07-13 11:41:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.59375) internal successors, (357), 224 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 357 transitions. [2022-07-13 11:41:53,574 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 357 transitions. Word has length 59 [2022-07-13 11:41:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:53,575 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 357 transitions. [2022-07-13 11:41:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 357 transitions. [2022-07-13 11:41:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:41:53,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:53,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:41:53,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1602864046, now seen corresponding path program 1 times [2022-07-13 11:41:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341717060] [2022-07-13 11:41:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:53,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341717060] [2022-07-13 11:41:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341717060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:53,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:53,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079215940] [2022-07-13 11:41:53,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:53,692 INFO L87 Difference]: Start difference. First operand 225 states and 357 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:55,699 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 [] [2022-07-13 11:41:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:56,056 INFO L93 Difference]: Finished difference Result 535 states and 851 transitions. [2022-07-13 11:41:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 11:41:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:56,059 INFO L225 Difference]: With dead ends: 535 [2022-07-13 11:41:56,059 INFO L226 Difference]: Without dead ends: 331 [2022-07-13 11:41:56,059 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:56,060 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 153 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:56,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 364 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:41:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-13 11:41:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 226. [2022-07-13 11:41:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5822222222222222) internal successors, (356), 225 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 356 transitions. [2022-07-13 11:41:56,065 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 356 transitions. Word has length 59 [2022-07-13 11:41:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:56,065 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 356 transitions. [2022-07-13 11:41:56,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 356 transitions. [2022-07-13 11:41:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:41:56,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:56,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:41:56,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash -760317761, now seen corresponding path program 1 times [2022-07-13 11:41:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630450158] [2022-07-13 11:41:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:56,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:56,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630450158] [2022-07-13 11:41:56,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630450158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:56,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:56,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:56,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90165113] [2022-07-13 11:41:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:56,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:56,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:56,159 INFO L87 Difference]: Start difference. First operand 226 states and 356 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) [2022-07-13 11:41:57,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:41:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:58,017 INFO L93 Difference]: Finished difference Result 444 states and 701 transitions. [2022-07-13 11:41:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:58,017 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 60 [2022-07-13 11:41:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:58,019 INFO L225 Difference]: With dead ends: 444 [2022-07-13 11:41:58,019 INFO L226 Difference]: Without dead ends: 239 [2022-07-13 11:41:58,019 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:58,020 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 22 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:58,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 509 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:41:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-13 11:41:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2022-07-13 11:41:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5777777777777777) internal successors, (355), 225 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 355 transitions. [2022-07-13 11:41:58,027 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 355 transitions. Word has length 60 [2022-07-13 11:41:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:58,027 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 355 transitions. [2022-07-13 11:41:58,028 INFO L496 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) [2022-07-13 11:41:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 355 transitions. [2022-07-13 11:41:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 11:41:58,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:58,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:41:58,029 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1762527104, now seen corresponding path program 1 times [2022-07-13 11:41:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:58,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305225811] [2022-07-13 11:41:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:58,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305225811] [2022-07-13 11:41:58,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305225811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:58,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:58,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:58,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023879741] [2022-07-13 11:41:58,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:58,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:58,113 INFO L87 Difference]: Start difference. First operand 226 states and 355 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:59,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:41:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:41:59,899 INFO L93 Difference]: Finished difference Result 444 states and 700 transitions. [2022-07-13 11:41:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:41:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 11:41:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:41:59,900 INFO L225 Difference]: With dead ends: 444 [2022-07-13 11:41:59,900 INFO L226 Difference]: Without dead ends: 239 [2022-07-13 11:41:59,900 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:41:59,901 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 20 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:41:59,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 509 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:41:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-13 11:41:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2022-07-13 11:41:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5733333333333333) internal successors, (354), 225 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 354 transitions. [2022-07-13 11:41:59,905 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 354 transitions. Word has length 61 [2022-07-13 11:41:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:41:59,905 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 354 transitions. [2022-07-13 11:41:59,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:41:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 354 transitions. [2022-07-13 11:41:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:41:59,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:41:59,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:41:59,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:41:59,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:41:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:41:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1501482972, now seen corresponding path program 1 times [2022-07-13 11:41:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:41:59,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771533650] [2022-07-13 11:41:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:41:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:41:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:41:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:41:59,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:41:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771533650] [2022-07-13 11:41:59,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771533650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:41:59,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:41:59,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:41:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219751687] [2022-07-13 11:41:59,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:41:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:41:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:41:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:41:59,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:41:59,984 INFO L87 Difference]: Start difference. First operand 226 states and 354 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:01,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:01,786 INFO L93 Difference]: Finished difference Result 434 states and 686 transitions. [2022-07-13 11:42:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 11:42:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:01,788 INFO L225 Difference]: With dead ends: 434 [2022-07-13 11:42:01,788 INFO L226 Difference]: Without dead ends: 229 [2022-07-13 11:42:01,788 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:01,788 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 11 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:01,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 523 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:42:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-13 11:42:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-07-13 11:42:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.568888888888889) internal successors, (353), 225 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 353 transitions. [2022-07-13 11:42:01,792 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 353 transitions. Word has length 62 [2022-07-13 11:42:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:01,793 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 353 transitions. [2022-07-13 11:42:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 353 transitions. [2022-07-13 11:42:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:42:01,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:01,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:42:01,794 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2113356404, now seen corresponding path program 1 times [2022-07-13 11:42:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:01,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875616672] [2022-07-13 11:42:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:01,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875616672] [2022-07-13 11:42:01,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875616672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:01,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:01,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895418398] [2022-07-13 11:42:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:01,884 INFO L87 Difference]: Start difference. First operand 226 states and 353 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:03,901 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 [] [2022-07-13 11:42:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:04,133 INFO L93 Difference]: Finished difference Result 471 states and 741 transitions. [2022-07-13 11:42:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:04,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 11:42:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:04,135 INFO L225 Difference]: With dead ends: 471 [2022-07-13 11:42:04,135 INFO L226 Difference]: Without dead ends: 266 [2022-07-13 11:42:04,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:04,136 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 31 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:04,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 527 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:42:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-13 11:42:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 248. [2022-07-13 11:42:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5708502024291497) internal successors, (388), 247 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 388 transitions. [2022-07-13 11:42:04,142 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 388 transitions. Word has length 62 [2022-07-13 11:42:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:04,142 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 388 transitions. [2022-07-13 11:42:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 388 transitions. [2022-07-13 11:42:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 11:42:04,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:04,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:42:04,144 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1668974810, now seen corresponding path program 1 times [2022-07-13 11:42:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570493515] [2022-07-13 11:42:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570493515] [2022-07-13 11:42:04,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570493515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:04,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:04,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:04,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935919944] [2022-07-13 11:42:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:04,246 INFO L87 Difference]: Start difference. First operand 248 states and 388 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:04,957 INFO L93 Difference]: Finished difference Result 580 states and 915 transitions. [2022-07-13 11:42:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2022-07-13 11:42:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:04,960 INFO L225 Difference]: With dead ends: 580 [2022-07-13 11:42:04,960 INFO L226 Difference]: Without dead ends: 353 [2022-07-13 11:42:04,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:04,961 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 158 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:04,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 364 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:42:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-13 11:42:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-07-13 11:42:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5546558704453441) internal successors, (384), 247 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 384 transitions. [2022-07-13 11:42:04,968 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 384 transitions. Word has length 76 [2022-07-13 11:42:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:04,968 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 384 transitions. [2022-07-13 11:42:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 384 transitions. [2022-07-13 11:42:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 11:42:04,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:04,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-07-13 11:42:04,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:42:04,970 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash 816858033, now seen corresponding path program 1 times [2022-07-13 11:42:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:04,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816648652] [2022-07-13 11:42:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:05,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:05,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816648652] [2022-07-13 11:42:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816648652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:05,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:05,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186823272] [2022-07-13 11:42:05,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:05,076 INFO L87 Difference]: Start difference. First operand 248 states and 384 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:05,651 INFO L93 Difference]: Finished difference Result 492 states and 766 transitions. [2022-07-13 11:42:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2022-07-13 11:42:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:05,653 INFO L225 Difference]: With dead ends: 492 [2022-07-13 11:42:05,653 INFO L226 Difference]: Without dead ends: 265 [2022-07-13 11:42:05,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:05,654 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 33 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:05,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 529 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:42:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-13 11:42:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 248. [2022-07-13 11:42:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5506072874493928) internal successors, (383), 247 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 383 transitions. [2022-07-13 11:42:05,660 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 383 transitions. Word has length 76 [2022-07-13 11:42:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:05,660 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 383 transitions. [2022-07-13 11:42:05,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 383 transitions. [2022-07-13 11:42:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 11:42:05,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:05,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:05,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:42:05,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash -733664128, now seen corresponding path program 1 times [2022-07-13 11:42:05,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:05,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429984761] [2022-07-13 11:42:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:05,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:05,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429984761] [2022-07-13 11:42:05,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429984761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:05,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:05,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:05,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692205135] [2022-07-13 11:42:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:05,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:05,757 INFO L87 Difference]: Start difference. First operand 248 states and 383 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:06,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:07,145 INFO L93 Difference]: Finished difference Result 580 states and 905 transitions. [2022-07-13 11:42:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-07-13 11:42:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:07,147 INFO L225 Difference]: With dead ends: 580 [2022-07-13 11:42:07,147 INFO L226 Difference]: Without dead ends: 353 [2022-07-13 11:42:07,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:07,148 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 156 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:07,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 364 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 11:42:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-13 11:42:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-07-13 11:42:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.534412955465587) internal successors, (379), 247 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 379 transitions. [2022-07-13 11:42:07,155 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 379 transitions. Word has length 77 [2022-07-13 11:42:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:07,155 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 379 transitions. [2022-07-13 11:42:07,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 379 transitions. [2022-07-13 11:42:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 11:42:07,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:07,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:42:07,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash -936264481, now seen corresponding path program 1 times [2022-07-13 11:42:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502106158] [2022-07-13 11:42:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:07,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502106158] [2022-07-13 11:42:07,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502106158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:07,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:07,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465861051] [2022-07-13 11:42:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:07,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:07,264 INFO L87 Difference]: Start difference. First operand 248 states and 379 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) [2022-07-13 11:42:08,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:09,137 INFO L93 Difference]: Finished difference Result 580 states and 897 transitions. [2022-07-13 11:42:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:09,138 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 78 [2022-07-13 11:42:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:09,139 INFO L225 Difference]: With dead ends: 580 [2022-07-13 11:42:09,139 INFO L226 Difference]: Without dead ends: 353 [2022-07-13 11:42:09,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:09,140 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 154 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:09,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 364 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:42:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-13 11:42:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-07-13 11:42:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5182186234817814) internal successors, (375), 247 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 375 transitions. [2022-07-13 11:42:09,146 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 375 transitions. Word has length 78 [2022-07-13 11:42:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:09,146 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 375 transitions. [2022-07-13 11:42:09,147 INFO L496 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) [2022-07-13 11:42:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 375 transitions. [2022-07-13 11:42:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 11:42:09,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:09,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:42:09,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1657145435, now seen corresponding path program 1 times [2022-07-13 11:42:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:09,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583328110] [2022-07-13 11:42:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:42:09,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:09,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583328110] [2022-07-13 11:42:09,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583328110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:09,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:09,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003325975] [2022-07-13 11:42:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:09,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:09,250 INFO L87 Difference]: Start difference. First operand 248 states and 375 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) [2022-07-13 11:42:10,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:11,127 INFO L93 Difference]: Finished difference Result 570 states and 876 transitions. [2022-07-13 11:42:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:11,127 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 79 [2022-07-13 11:42:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:11,129 INFO L225 Difference]: With dead ends: 570 [2022-07-13 11:42:11,129 INFO L226 Difference]: Without dead ends: 343 [2022-07-13 11:42:11,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:11,129 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 145 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:11,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 384 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:42:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-13 11:42:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 248. [2022-07-13 11:42:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5020242914979758) internal successors, (371), 247 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 371 transitions. [2022-07-13 11:42:11,134 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 371 transitions. Word has length 79 [2022-07-13 11:42:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:11,135 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 371 transitions. [2022-07-13 11:42:11,135 INFO L496 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) [2022-07-13 11:42:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 371 transitions. [2022-07-13 11:42:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 11:42:11,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:11,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:11,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:42:11,136 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1994521312, now seen corresponding path program 1 times [2022-07-13 11:42:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553663132] [2022-07-13 11:42:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553663132] [2022-07-13 11:42:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553663132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:11,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:11,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:11,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539253324] [2022-07-13 11:42:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:11,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:11,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:11,238 INFO L87 Difference]: Start difference. First operand 248 states and 371 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:12,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:12,994 INFO L93 Difference]: Finished difference Result 570 states and 868 transitions. [2022-07-13 11:42:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:12,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 84 [2022-07-13 11:42:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:12,996 INFO L225 Difference]: With dead ends: 570 [2022-07-13 11:42:12,996 INFO L226 Difference]: Without dead ends: 343 [2022-07-13 11:42:12,996 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:12,997 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 119 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:12,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 402 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 11:42:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-13 11:42:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 271. [2022-07-13 11:42:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.5407407407407407) internal successors, (416), 270 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 416 transitions. [2022-07-13 11:42:13,001 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 416 transitions. Word has length 84 [2022-07-13 11:42:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:13,002 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 416 transitions. [2022-07-13 11:42:13,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 416 transitions. [2022-07-13 11:42:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 11:42:13,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:13,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:42:13,003 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash 374028283, now seen corresponding path program 1 times [2022-07-13 11:42:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378994091] [2022-07-13 11:42:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:13,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378994091] [2022-07-13 11:42:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378994091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:13,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:13,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209318050] [2022-07-13 11:42:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:13,106 INFO L87 Difference]: Start difference. First operand 271 states and 416 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:14,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:14,956 INFO L93 Difference]: Finished difference Result 609 states and 942 transitions. [2022-07-13 11:42:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-13 11:42:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:14,957 INFO L225 Difference]: With dead ends: 609 [2022-07-13 11:42:14,958 INFO L226 Difference]: Without dead ends: 359 [2022-07-13 11:42:14,958 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:14,958 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 86 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:14,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 505 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:42:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-13 11:42:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2022-07-13 11:42:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.542763157894737) internal successors, (469), 304 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 469 transitions. [2022-07-13 11:42:14,963 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 469 transitions. Word has length 112 [2022-07-13 11:42:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 469 transitions. [2022-07-13 11:42:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 469 transitions. [2022-07-13 11:42:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 11:42:14,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:14,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:42:14,965 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash -118597891, now seen corresponding path program 1 times [2022-07-13 11:42:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518088972] [2022-07-13 11:42:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:15,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518088972] [2022-07-13 11:42:15,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518088972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:15,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:15,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438822463] [2022-07-13 11:42:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:15,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:15,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:15,045 INFO L87 Difference]: Start difference. First operand 305 states and 469 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:15,507 INFO L93 Difference]: Finished difference Result 737 states and 1146 transitions. [2022-07-13 11:42:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-13 11:42:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:15,509 INFO L225 Difference]: With dead ends: 737 [2022-07-13 11:42:15,509 INFO L226 Difference]: Without dead ends: 453 [2022-07-13 11:42:15,510 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:15,510 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 125 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:15,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 394 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:42:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-13 11:42:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 335. [2022-07-13 11:42:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5508982035928143) internal successors, (518), 334 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 518 transitions. [2022-07-13 11:42:15,516 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 518 transitions. Word has length 112 [2022-07-13 11:42:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:15,516 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 518 transitions. [2022-07-13 11:42:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 518 transitions. [2022-07-13 11:42:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 11:42:15,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:15,517 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:42:15,517 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash -183248622, now seen corresponding path program 1 times [2022-07-13 11:42:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243741578] [2022-07-13 11:42:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:15,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243741578] [2022-07-13 11:42:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243741578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:15,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:15,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020204945] [2022-07-13 11:42:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:15,600 INFO L87 Difference]: Start difference. First operand 335 states and 518 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:16,320 INFO L93 Difference]: Finished difference Result 761 states and 1181 transitions. [2022-07-13 11:42:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-07-13 11:42:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:16,322 INFO L225 Difference]: With dead ends: 761 [2022-07-13 11:42:16,322 INFO L226 Difference]: Without dead ends: 447 [2022-07-13 11:42:16,322 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:16,323 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 382 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:42:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-13 11:42:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 372. [2022-07-13 11:42:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.5552560646900269) internal successors, (577), 371 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 577 transitions. [2022-07-13 11:42:16,329 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 577 transitions. Word has length 118 [2022-07-13 11:42:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:16,329 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 577 transitions. [2022-07-13 11:42:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 577 transitions. [2022-07-13 11:42:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 11:42:16,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:16,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:16,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:42:16,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash 548980907, now seen corresponding path program 1 times [2022-07-13 11:42:16,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:16,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693309974] [2022-07-13 11:42:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693309974] [2022-07-13 11:42:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693309974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:16,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:16,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:16,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063007037] [2022-07-13 11:42:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:16,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:16,416 INFO L87 Difference]: Start difference. First operand 372 states and 577 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:18,421 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 [] [2022-07-13 11:42:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:18,657 INFO L93 Difference]: Finished difference Result 808 states and 1258 transitions. [2022-07-13 11:42:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2022-07-13 11:42:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:18,659 INFO L225 Difference]: With dead ends: 808 [2022-07-13 11:42:18,659 INFO L226 Difference]: Without dead ends: 457 [2022-07-13 11:42:18,660 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:18,660 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 75 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:18,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 507 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:42:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-13 11:42:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 412. [2022-07-13 11:42:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5571776155717763) internal successors, (640), 411 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 640 transitions. [2022-07-13 11:42:18,669 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 640 transitions. Word has length 119 [2022-07-13 11:42:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:18,669 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 640 transitions. [2022-07-13 11:42:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 640 transitions. [2022-07-13 11:42:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 11:42:18,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:18,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:18,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:42:18,671 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1528355991, now seen corresponding path program 1 times [2022-07-13 11:42:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101700972] [2022-07-13 11:42:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 11:42:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101700972] [2022-07-13 11:42:18,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101700972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:18,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:18,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:18,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776131694] [2022-07-13 11:42:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:18,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:18,773 INFO L87 Difference]: Start difference. First operand 412 states and 640 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) [2022-07-13 11:42:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:19,927 INFO L93 Difference]: Finished difference Result 840 states and 1309 transitions. [2022-07-13 11:42:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:19,927 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 119 [2022-07-13 11:42:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:19,929 INFO L225 Difference]: With dead ends: 840 [2022-07-13 11:42:19,929 INFO L226 Difference]: Without dead ends: 449 [2022-07-13 11:42:19,929 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:19,930 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 28 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:19,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 607 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 11:42:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-13 11:42:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 436. [2022-07-13 11:42:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5517241379310345) internal successors, (675), 435 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 675 transitions. [2022-07-13 11:42:19,937 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 675 transitions. Word has length 119 [2022-07-13 11:42:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:19,937 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 675 transitions. [2022-07-13 11:42:19,937 INFO L496 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) [2022-07-13 11:42:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 675 transitions. [2022-07-13 11:42:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-13 11:42:19,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:19,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:42:19,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -564481906, now seen corresponding path program 1 times [2022-07-13 11:42:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097848470] [2022-07-13 11:42:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:42:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097848470] [2022-07-13 11:42:20,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097848470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:20,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:20,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:20,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718305980] [2022-07-13 11:42:20,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:20,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:20,028 INFO L87 Difference]: Start difference. First operand 436 states and 675 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:21,118 INFO L93 Difference]: Finished difference Result 889 states and 1379 transitions. [2022-07-13 11:42:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 126 [2022-07-13 11:42:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:21,120 INFO L225 Difference]: With dead ends: 889 [2022-07-13 11:42:21,120 INFO L226 Difference]: Without dead ends: 474 [2022-07-13 11:42:21,121 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:21,121 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 61 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:21,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 513 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 11:42:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-13 11:42:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 439. [2022-07-13 11:42:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.547945205479452) internal successors, (678), 438 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 678 transitions. [2022-07-13 11:42:21,128 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 678 transitions. Word has length 126 [2022-07-13 11:42:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:21,128 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 678 transitions. [2022-07-13 11:42:21,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 678 transitions. [2022-07-13 11:42:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 11:42:21,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:21,130 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:42:21,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -399938714, now seen corresponding path program 1 times [2022-07-13 11:42:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:21,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656369785] [2022-07-13 11:42:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:21,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656369785] [2022-07-13 11:42:21,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656369785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:21,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791005376] [2022-07-13 11:42:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:21,208 INFO L87 Difference]: Start difference. First operand 439 states and 678 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:21,909 INFO L93 Difference]: Finished difference Result 891 states and 1380 transitions. [2022-07-13 11:42:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 133 [2022-07-13 11:42:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:21,911 INFO L225 Difference]: With dead ends: 891 [2022-07-13 11:42:21,911 INFO L226 Difference]: Without dead ends: 473 [2022-07-13 11:42:21,911 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:21,912 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 83 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:21,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 515 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:42:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-07-13 11:42:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 439. [2022-07-13 11:42:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.5456621004566211) internal successors, (677), 438 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 677 transitions. [2022-07-13 11:42:21,919 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 677 transitions. Word has length 133 [2022-07-13 11:42:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:21,920 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 677 transitions. [2022-07-13 11:42:21,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 677 transitions. [2022-07-13 11:42:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 11:42:21,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:21,921 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:21,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:42:21,922 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1477124516, now seen corresponding path program 1 times [2022-07-13 11:42:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34179248] [2022-07-13 11:42:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34179248] [2022-07-13 11:42:22,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34179248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:22,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:22,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202596639] [2022-07-13 11:42:22,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:22,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:22,005 INFO L87 Difference]: Start difference. First operand 439 states and 677 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:23,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:23,954 INFO L93 Difference]: Finished difference Result 869 states and 1346 transitions. [2022-07-13 11:42:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 133 [2022-07-13 11:42:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:23,957 INFO L225 Difference]: With dead ends: 869 [2022-07-13 11:42:23,957 INFO L226 Difference]: Without dead ends: 451 [2022-07-13 11:42:23,958 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:23,958 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 33 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 607 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 11:42:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-13 11:42:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 439. [2022-07-13 11:42:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.54337899543379) internal successors, (676), 438 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 676 transitions. [2022-07-13 11:42:23,967 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 676 transitions. Word has length 133 [2022-07-13 11:42:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:23,967 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 676 transitions. [2022-07-13 11:42:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 676 transitions. [2022-07-13 11:42:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-13 11:42:23,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:23,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1] [2022-07-13 11:42:23,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:42:23,969 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash 653565499, now seen corresponding path program 1 times [2022-07-13 11:42:23,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:23,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071276255] [2022-07-13 11:42:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:23,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 11:42:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071276255] [2022-07-13 11:42:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071276255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:24,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:24,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113974269] [2022-07-13 11:42:24,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:24,090 INFO L87 Difference]: Start difference. First operand 439 states and 676 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:24,795 INFO L93 Difference]: Finished difference Result 969 states and 1496 transitions. [2022-07-13 11:42:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 139 [2022-07-13 11:42:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:24,798 INFO L225 Difference]: With dead ends: 969 [2022-07-13 11:42:24,798 INFO L226 Difference]: Without dead ends: 551 [2022-07-13 11:42:24,799 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:24,799 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 128 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:24,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 402 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:42:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-13 11:42:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 469. [2022-07-13 11:42:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5341880341880343) internal successors, (718), 468 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 718 transitions. [2022-07-13 11:42:24,809 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 718 transitions. Word has length 139 [2022-07-13 11:42:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:24,809 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 718 transitions. [2022-07-13 11:42:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 718 transitions. [2022-07-13 11:42:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-13 11:42:24,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:24,811 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:24,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 11:42:24,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash -938161955, now seen corresponding path program 1 times [2022-07-13 11:42:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:24,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403205844] [2022-07-13 11:42:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:24,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 11:42:24,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403205844] [2022-07-13 11:42:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403205844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:24,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:24,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613228906] [2022-07-13 11:42:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:24,915 INFO L87 Difference]: Start difference. First operand 469 states and 718 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:25,509 INFO L93 Difference]: Finished difference Result 989 states and 1516 transitions. [2022-07-13 11:42:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 140 [2022-07-13 11:42:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:25,511 INFO L225 Difference]: With dead ends: 989 [2022-07-13 11:42:25,511 INFO L226 Difference]: Without dead ends: 541 [2022-07-13 11:42:25,511 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:25,512 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 127 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:25,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 382 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:42:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-07-13 11:42:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 469. [2022-07-13 11:42:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5213675213675213) internal successors, (712), 468 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 712 transitions. [2022-07-13 11:42:25,518 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 712 transitions. Word has length 140 [2022-07-13 11:42:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:25,519 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 712 transitions. [2022-07-13 11:42:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 712 transitions. [2022-07-13 11:42:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-13 11:42:25,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:25,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:25,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 11:42:25,521 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 599251561, now seen corresponding path program 1 times [2022-07-13 11:42:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:25,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324815281] [2022-07-13 11:42:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:25,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324815281] [2022-07-13 11:42:25,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324815281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:25,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:25,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525705108] [2022-07-13 11:42:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:25,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:25,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:25,602 INFO L87 Difference]: Start difference. First operand 469 states and 712 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:26,371 INFO L93 Difference]: Finished difference Result 949 states and 1446 transitions. [2022-07-13 11:42:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-13 11:42:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:26,372 INFO L225 Difference]: With dead ends: 949 [2022-07-13 11:42:26,373 INFO L226 Difference]: Without dead ends: 501 [2022-07-13 11:42:26,373 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:26,373 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 73 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:26,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 533 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:42:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-13 11:42:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 469. [2022-07-13 11:42:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5192307692307692) internal successors, (711), 468 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 711 transitions. [2022-07-13 11:42:26,380 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 711 transitions. Word has length 141 [2022-07-13 11:42:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 711 transitions. [2022-07-13 11:42:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 711 transitions. [2022-07-13 11:42:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-13 11:42:26,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:26,382 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:26,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:42:26,382 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1307151705, now seen corresponding path program 1 times [2022-07-13 11:42:26,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:26,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638323776] [2022-07-13 11:42:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 11:42:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638323776] [2022-07-13 11:42:26,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638323776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:26,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:26,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:42:26,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638472463] [2022-07-13 11:42:26,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:42:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:42:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:42:26,460 INFO L87 Difference]: Start difference. First operand 469 states and 711 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:26,500 INFO L93 Difference]: Finished difference Result 1360 states and 2077 transitions. [2022-07-13 11:42:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:42:26,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-13 11:42:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:26,503 INFO L225 Difference]: With dead ends: 1360 [2022-07-13 11:42:26,503 INFO L226 Difference]: Without dead ends: 912 [2022-07-13 11:42:26,504 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:26,507 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:26,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 435 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:42:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-07-13 11:42:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 910. [2022-07-13 11:42:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.5126512651265127) internal successors, (1375), 909 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1375 transitions. [2022-07-13 11:42:26,518 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1375 transitions. Word has length 141 [2022-07-13 11:42:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:26,519 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1375 transitions. [2022-07-13 11:42:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1375 transitions. [2022-07-13 11:42:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-13 11:42:26,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:26,521 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:26,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:42:26,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1616008293, now seen corresponding path program 1 times [2022-07-13 11:42:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:26,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514827068] [2022-07-13 11:42:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-13 11:42:26,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:26,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514827068] [2022-07-13 11:42:26,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514827068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:26,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:26,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375864211] [2022-07-13 11:42:26,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:26,616 INFO L87 Difference]: Start difference. First operand 910 states and 1375 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:27,177 INFO L93 Difference]: Finished difference Result 1880 states and 2843 transitions. [2022-07-13 11:42:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:27,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 141 [2022-07-13 11:42:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:27,180 INFO L225 Difference]: With dead ends: 1880 [2022-07-13 11:42:27,180 INFO L226 Difference]: Without dead ends: 991 [2022-07-13 11:42:27,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:27,181 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 31 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:27,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 607 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:42:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-07-13 11:42:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 962. [2022-07-13 11:42:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.5119667013527576) internal successors, (1453), 961 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1453 transitions. [2022-07-13 11:42:27,195 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1453 transitions. Word has length 141 [2022-07-13 11:42:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:27,195 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1453 transitions. [2022-07-13 11:42:27,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1453 transitions. [2022-07-13 11:42:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-13 11:42:27,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:27,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:27,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 11:42:27,198 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1575140792, now seen corresponding path program 1 times [2022-07-13 11:42:27,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576135130] [2022-07-13 11:42:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 11:42:27,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:27,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576135130] [2022-07-13 11:42:27,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576135130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:27,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:27,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577460000] [2022-07-13 11:42:27,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:27,318 INFO L87 Difference]: Start difference. First operand 962 states and 1453 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:27,833 INFO L93 Difference]: Finished difference Result 2122 states and 3197 transitions. [2022-07-13 11:42:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 143 [2022-07-13 11:42:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:27,837 INFO L225 Difference]: With dead ends: 2122 [2022-07-13 11:42:27,837 INFO L226 Difference]: Without dead ends: 1181 [2022-07-13 11:42:27,838 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:27,838 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 129 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:27,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 402 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:42:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-13 11:42:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1018. [2022-07-13 11:42:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.5014749262536873) internal successors, (1527), 1017 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1527 transitions. [2022-07-13 11:42:27,853 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1527 transitions. Word has length 143 [2022-07-13 11:42:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:27,853 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1527 transitions. [2022-07-13 11:42:27,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1527 transitions. [2022-07-13 11:42:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-13 11:42:27,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:27,855 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:27,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:42:27,856 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1093473274, now seen corresponding path program 1 times [2022-07-13 11:42:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036468449] [2022-07-13 11:42:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 11:42:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036468449] [2022-07-13 11:42:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036468449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:27,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:27,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847784268] [2022-07-13 11:42:27,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:27,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:27,949 INFO L87 Difference]: Start difference. First operand 1018 states and 1527 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:28,377 INFO L93 Difference]: Finished difference Result 2062 states and 3090 transitions. [2022-07-13 11:42:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-13 11:42:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:28,380 INFO L225 Difference]: With dead ends: 2062 [2022-07-13 11:42:28,380 INFO L226 Difference]: Without dead ends: 1065 [2022-07-13 11:42:28,381 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:28,381 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 57 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:28,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 551 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:42:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-07-13 11:42:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1018. [2022-07-13 11:42:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.4995083579154376) internal successors, (1525), 1017 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1525 transitions. [2022-07-13 11:42:28,394 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1525 transitions. Word has length 144 [2022-07-13 11:42:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1525 transitions. [2022-07-13 11:42:28,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1525 transitions. [2022-07-13 11:42:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-13 11:42:28,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:28,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 11:42:28,397 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 471469138, now seen corresponding path program 1 times [2022-07-13 11:42:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:28,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220379908] [2022-07-13 11:42:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:28,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:28,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220379908] [2022-07-13 11:42:28,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220379908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:28,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:28,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:28,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58698433] [2022-07-13 11:42:28,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:28,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:28,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:28,488 INFO L87 Difference]: Start difference. First operand 1018 states and 1525 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:29,454 INFO L93 Difference]: Finished difference Result 2154 states and 3217 transitions. [2022-07-13 11:42:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-13 11:42:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:29,457 INFO L225 Difference]: With dead ends: 2154 [2022-07-13 11:42:29,457 INFO L226 Difference]: Without dead ends: 1157 [2022-07-13 11:42:29,458 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:29,458 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 131 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 386 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:42:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-07-13 11:42:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1018. [2022-07-13 11:42:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.4837758112094395) internal successors, (1509), 1017 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1509 transitions. [2022-07-13 11:42:29,471 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1509 transitions. Word has length 147 [2022-07-13 11:42:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:29,471 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1509 transitions. [2022-07-13 11:42:29,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1509 transitions. [2022-07-13 11:42:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-13 11:42:29,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:29,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:29,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:42:29,473 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1372309044, now seen corresponding path program 1 times [2022-07-13 11:42:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145760453] [2022-07-13 11:42:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145760453] [2022-07-13 11:42:29,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145760453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:29,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:29,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:29,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478326342] [2022-07-13 11:42:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:29,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:29,556 INFO L87 Difference]: Start difference. First operand 1018 states and 1509 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:29,999 INFO L93 Difference]: Finished difference Result 2154 states and 3185 transitions. [2022-07-13 11:42:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 148 [2022-07-13 11:42:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:30,003 INFO L225 Difference]: With dead ends: 2154 [2022-07-13 11:42:30,003 INFO L226 Difference]: Without dead ends: 1157 [2022-07-13 11:42:30,004 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:30,004 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 130 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:30,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 382 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:42:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-07-13 11:42:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1018. [2022-07-13 11:42:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.4680432645034416) internal successors, (1493), 1017 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1493 transitions. [2022-07-13 11:42:30,019 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1493 transitions. Word has length 148 [2022-07-13 11:42:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:30,019 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1493 transitions. [2022-07-13 11:42:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1493 transitions. [2022-07-13 11:42:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-13 11:42:30,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:30,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:30,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 11:42:30,021 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash -489063871, now seen corresponding path program 1 times [2022-07-13 11:42:30,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:30,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915886289] [2022-07-13 11:42:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 11:42:30,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915886289] [2022-07-13 11:42:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915886289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:30,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:30,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849207115] [2022-07-13 11:42:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:30,110 INFO L87 Difference]: Start difference. First operand 1018 states and 1493 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:30,801 INFO L93 Difference]: Finished difference Result 2234 states and 3271 transitions. [2022-07-13 11:42:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 151 [2022-07-13 11:42:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:30,804 INFO L225 Difference]: With dead ends: 2234 [2022-07-13 11:42:30,804 INFO L226 Difference]: Without dead ends: 1237 [2022-07-13 11:42:30,805 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:30,806 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:30,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 382 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:42:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-07-13 11:42:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1088. [2022-07-13 11:42:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.4618215271389143) internal successors, (1589), 1087 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1589 transitions. [2022-07-13 11:42:30,825 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1589 transitions. Word has length 151 [2022-07-13 11:42:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:30,826 INFO L495 AbstractCegarLoop]: Abstraction has 1088 states and 1589 transitions. [2022-07-13 11:42:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1589 transitions. [2022-07-13 11:42:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-13 11:42:30,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:30,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 11:42:30,828 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash 51753423, now seen corresponding path program 1 times [2022-07-13 11:42:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824545261] [2022-07-13 11:42:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:30,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824545261] [2022-07-13 11:42:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824545261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:30,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:30,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067079536] [2022-07-13 11:42:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:30,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:30,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:30,915 INFO L87 Difference]: Start difference. First operand 1088 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:31,841 INFO L93 Difference]: Finished difference Result 2374 states and 3463 transitions. [2022-07-13 11:42:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 151 [2022-07-13 11:42:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:31,845 INFO L225 Difference]: With dead ends: 2374 [2022-07-13 11:42:31,845 INFO L226 Difference]: Without dead ends: 1307 [2022-07-13 11:42:31,846 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:31,846 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 123 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:31,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 392 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:42:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-07-13 11:42:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1154. [2022-07-13 11:42:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.4544666088464875) internal successors, (1677), 1153 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1677 transitions. [2022-07-13 11:42:31,871 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1677 transitions. Word has length 151 [2022-07-13 11:42:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:31,871 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1677 transitions. [2022-07-13 11:42:31,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1677 transitions. [2022-07-13 11:42:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-13 11:42:31,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:31,873 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:31,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 11:42:31,874 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:31,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1042092054, now seen corresponding path program 1 times [2022-07-13 11:42:31,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:31,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853141707] [2022-07-13 11:42:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:42:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853141707] [2022-07-13 11:42:31,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853141707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:31,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:31,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130349068] [2022-07-13 11:42:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:31,951 INFO L87 Difference]: Start difference. First operand 1154 states and 1677 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:32,447 INFO L93 Difference]: Finished difference Result 2318 states and 3368 transitions. [2022-07-13 11:42:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 152 [2022-07-13 11:42:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:32,462 INFO L225 Difference]: With dead ends: 2318 [2022-07-13 11:42:32,462 INFO L226 Difference]: Without dead ends: 1185 [2022-07-13 11:42:32,463 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:32,464 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 39 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 561 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:42:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-13 11:42:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1154. [2022-07-13 11:42:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.4527320034692108) internal successors, (1675), 1153 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1675 transitions. [2022-07-13 11:42:32,490 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1675 transitions. Word has length 152 [2022-07-13 11:42:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:32,490 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1675 transitions. [2022-07-13 11:42:32,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1675 transitions. [2022-07-13 11:42:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-13 11:42:32,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:32,492 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 11:42:32,493 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1628444376, now seen corresponding path program 1 times [2022-07-13 11:42:32,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551991497] [2022-07-13 11:42:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:32,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 11:42:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551991497] [2022-07-13 11:42:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551991497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:32,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:32,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663193544] [2022-07-13 11:42:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:32,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:32,578 INFO L87 Difference]: Start difference. First operand 1154 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:33,682 INFO L93 Difference]: Finished difference Result 2312 states and 3357 transitions. [2022-07-13 11:42:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:33,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-13 11:42:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:33,686 INFO L225 Difference]: With dead ends: 2312 [2022-07-13 11:42:33,686 INFO L226 Difference]: Without dead ends: 1179 [2022-07-13 11:42:33,687 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:33,688 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 33 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:33,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 563 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 11:42:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-13 11:42:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1154. [2022-07-13 11:42:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.4509973980919342) internal successors, (1673), 1153 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1673 transitions. [2022-07-13 11:42:33,715 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1673 transitions. Word has length 152 [2022-07-13 11:42:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:33,716 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1673 transitions. [2022-07-13 11:42:33,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1673 transitions. [2022-07-13 11:42:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-13 11:42:33,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:33,718 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:33,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-13 11:42:33,718 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1310969376, now seen corresponding path program 1 times [2022-07-13 11:42:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:33,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783977412] [2022-07-13 11:42:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:33,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 11:42:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783977412] [2022-07-13 11:42:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783977412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:33,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:33,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954085676] [2022-07-13 11:42:33,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:33,813 INFO L87 Difference]: Start difference. First operand 1154 states and 1673 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:35,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:35,796 INFO L93 Difference]: Finished difference Result 2444 states and 3542 transitions. [2022-07-13 11:42:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-07-13 11:42:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:35,799 INFO L225 Difference]: With dead ends: 2444 [2022-07-13 11:42:35,799 INFO L226 Difference]: Without dead ends: 1311 [2022-07-13 11:42:35,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:35,801 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 66 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:35,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 579 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:42:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-07-13 11:42:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1230. [2022-07-13 11:42:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.4491456468673718) internal successors, (1781), 1229 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1781 transitions. [2022-07-13 11:42:35,827 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1781 transitions. Word has length 155 [2022-07-13 11:42:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1781 transitions. [2022-07-13 11:42:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1781 transitions. [2022-07-13 11:42:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 11:42:35,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:35,829 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 11:42:35,829 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2067414622, now seen corresponding path program 1 times [2022-07-13 11:42:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:35,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497725334] [2022-07-13 11:42:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 11:42:35,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497725334] [2022-07-13 11:42:35,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497725334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:35,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:35,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:42:35,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224548304] [2022-07-13 11:42:35,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:42:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:42:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:42:35,902 INFO L87 Difference]: Start difference. First operand 1230 states and 1781 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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) [2022-07-13 11:42:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:35,939 INFO L93 Difference]: Finished difference Result 2466 states and 3574 transitions. [2022-07-13 11:42:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:42:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 160 [2022-07-13 11:42:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:35,943 INFO L225 Difference]: With dead ends: 2466 [2022-07-13 11:42:35,943 INFO L226 Difference]: Without dead ends: 1257 [2022-07-13 11:42:35,944 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:35,946 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:35,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 420 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:42:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-07-13 11:42:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1257. [2022-07-13 11:42:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.4458598726114649) internal successors, (1816), 1256 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1816 transitions. [2022-07-13 11:42:35,963 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1816 transitions. Word has length 160 [2022-07-13 11:42:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:35,964 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1816 transitions. [2022-07-13 11:42:35,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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) [2022-07-13 11:42:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1816 transitions. [2022-07-13 11:42:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 11:42:35,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:35,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:35,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 11:42:35,969 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash 439682852, now seen corresponding path program 1 times [2022-07-13 11:42:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:35,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028983011] [2022-07-13 11:42:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:35,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-13 11:42:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028983011] [2022-07-13 11:42:36,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028983011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:36,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:36,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:42:36,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943506006] [2022-07-13 11:42:36,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:42:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:42:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:42:36,050 INFO L87 Difference]: Start difference. First operand 1257 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2022-07-13 11:42:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:36,079 INFO L93 Difference]: Finished difference Result 2495 states and 3610 transitions. [2022-07-13 11:42:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:42:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 160 [2022-07-13 11:42:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:36,083 INFO L225 Difference]: With dead ends: 2495 [2022-07-13 11:42:36,083 INFO L226 Difference]: Without dead ends: 1259 [2022-07-13 11:42:36,084 INFO L412 NwaCegarLoop]: 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 [2022-07-13 11:42:36,084 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:36,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 399 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:42:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-07-13 11:42:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1259. [2022-07-13 11:42:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 1.4451510333863276) internal successors, (1818), 1258 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1818 transitions. [2022-07-13 11:42:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1818 transitions. Word has length 160 [2022-07-13 11:42:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:36,100 INFO L495 AbstractCegarLoop]: Abstraction has 1259 states and 1818 transitions. [2022-07-13 11:42:36,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2022-07-13 11:42:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1818 transitions. [2022-07-13 11:42:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 11:42:36,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:36,102 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:42:36,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 11:42:36,102 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -797461174, now seen corresponding path program 1 times [2022-07-13 11:42:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:36,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746981073] [2022-07-13 11:42:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 11:42:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:36,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746981073] [2022-07-13 11:42:36,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746981073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:36,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:36,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574207262] [2022-07-13 11:42:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:36,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:36,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:36,186 INFO L87 Difference]: Start difference. First operand 1259 states and 1818 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:37,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:42:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:38,051 INFO L93 Difference]: Finished difference Result 2635 states and 3802 transitions. [2022-07-13 11:42:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 161 [2022-07-13 11:42:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:38,054 INFO L225 Difference]: With dead ends: 2635 [2022-07-13 11:42:38,054 INFO L226 Difference]: Without dead ends: 1399 [2022-07-13 11:42:38,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:38,055 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 117 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:38,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 382 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 11:42:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-07-13 11:42:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1183. [2022-07-13 11:42:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.4433164128595601) internal successors, (1706), 1182 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1706 transitions. [2022-07-13 11:42:38,071 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1706 transitions. Word has length 161 [2022-07-13 11:42:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:38,071 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1706 transitions. [2022-07-13 11:42:38,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1706 transitions. [2022-07-13 11:42:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-13 11:42:38,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:38,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:38,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-13 11:42:38,073 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1165663926, now seen corresponding path program 1 times [2022-07-13 11:42:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:38,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594104943] [2022-07-13 11:42:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 11:42:38,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594104943] [2022-07-13 11:42:38,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594104943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:38,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:38,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:38,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543889319] [2022-07-13 11:42:38,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:38,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:38,152 INFO L87 Difference]: Start difference. First operand 1183 states and 1706 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:39,299 INFO L93 Difference]: Finished difference Result 2501 states and 3605 transitions. [2022-07-13 11:42:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 163 [2022-07-13 11:42:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:39,302 INFO L225 Difference]: With dead ends: 2501 [2022-07-13 11:42:39,302 INFO L226 Difference]: Without dead ends: 1341 [2022-07-13 11:42:39,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:39,303 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 60 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:39,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 581 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 11:42:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-07-13 11:42:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1269. [2022-07-13 11:42:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 1.4416403785488958) internal successors, (1828), 1268 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1828 transitions. [2022-07-13 11:42:39,322 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1828 transitions. Word has length 163 [2022-07-13 11:42:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:39,322 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1828 transitions. [2022-07-13 11:42:39,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1828 transitions. [2022-07-13 11:42:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-13 11:42:39,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:39,324 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-13 11:42:39,325 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash -502693233, now seen corresponding path program 1 times [2022-07-13 11:42:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026672621] [2022-07-13 11:42:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 11:42:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026672621] [2022-07-13 11:42:39,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026672621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:39,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:39,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:42:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166990164] [2022-07-13 11:42:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:42:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:42:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:42:39,419 INFO L87 Difference]: Start difference. First operand 1269 states and 1828 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:40,301 INFO L93 Difference]: Finished difference Result 2579 states and 3715 transitions. [2022-07-13 11:42:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:42:40,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 164 [2022-07-13 11:42:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:40,303 INFO L225 Difference]: With dead ends: 2579 [2022-07-13 11:42:40,303 INFO L226 Difference]: Without dead ends: 1329 [2022-07-13 11:42:40,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:40,305 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 54 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:40,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 583 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:42:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-07-13 11:42:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1267. [2022-07-13 11:42:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.4407582938388626) internal successors, (1824), 1266 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1824 transitions. [2022-07-13 11:42:40,321 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1824 transitions. Word has length 164 [2022-07-13 11:42:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:40,321 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 1824 transitions. [2022-07-13 11:42:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1824 transitions. [2022-07-13 11:42:40,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-13 11:42:40,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:40,323 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-13 11:42:40,323 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -667829280, now seen corresponding path program 1 times [2022-07-13 11:42:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:40,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925607290] [2022-07-13 11:42:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-13 11:42:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:40,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925607290] [2022-07-13 11:42:40,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925607290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:42:40,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:42:40,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:42:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934989762] [2022-07-13 11:42:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:42:40,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:42:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:42:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:42:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:42:40,627 INFO L87 Difference]: Start difference. First operand 1267 states and 1824 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:42:41,878 INFO L93 Difference]: Finished difference Result 2531 states and 3644 transitions. [2022-07-13 11:42:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:42:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 169 [2022-07-13 11:42:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:42:41,881 INFO L225 Difference]: With dead ends: 2531 [2022-07-13 11:42:41,881 INFO L226 Difference]: Without dead ends: 1267 [2022-07-13 11:42:41,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:42:41,882 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 7 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:42:41,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 711 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 11:42:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-07-13 11:42:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-07-13 11:42:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.4399684044233807) internal successors, (1823), 1266 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1823 transitions. [2022-07-13 11:42:41,898 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1823 transitions. Word has length 169 [2022-07-13 11:42:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:42:41,898 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 1823 transitions. [2022-07-13 11:42:41,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:42:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1823 transitions. [2022-07-13 11:42:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-13 11:42:41,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:42:41,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:42:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-13 11:42:41,901 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:42:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:42:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2075555230, now seen corresponding path program 1 times [2022-07-13 11:42:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:42:41,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245606178] [2022-07-13 11:42:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:41,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:42:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 11:42:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:42:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245606178] [2022-07-13 11:42:42,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245606178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:42:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126411733] [2022-07-13 11:42:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:42:42,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:42:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:42:42,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:42:42,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:42:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:42:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 167 conjunts are in the unsatisfiable core [2022-07-13 11:42:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:42:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:42:43,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:42:43,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:42:44,163 INFO L356 Elim1Store]: treesize reduction 1040, result has 8.0 percent of original size [2022-07-13 11:42:44,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 181610 treesize of output 38647 [2022-07-13 11:42:54,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-07-13 11:42:54,994 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-07-13 11:42:54,996 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 11:42:55,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 11:42:55,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-13 11:42:55,199 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:164) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.push(UndoableWrapperScript.java:54) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.pushContext(SimplifyDDA.java:736) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:648) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:182) ... 54 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 72 more [2022-07-13 11:42:55,203 INFO L158 Benchmark]: Toolchain (without parser) took 73319.23ms. Allocated memory was 92.3MB in the beginning and 792.7MB in the end (delta: 700.4MB). Free memory was 53.9MB in the beginning and 657.3MB in the end (delta: -603.5MB). Peak memory consumption was 600.5MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,203 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory was 39.6MB in the beginning and 39.5MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:42:55,203 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.05ms. Allocated memory is still 92.3MB. Free memory was 53.6MB in the beginning and 46.4MB in the end (delta: 7.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,203 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.47ms. Allocated memory is still 92.3MB. Free memory was 46.4MB in the beginning and 41.3MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,203 INFO L158 Benchmark]: Boogie Preprocessor took 93.18ms. Allocated memory is still 92.3MB. Free memory was 41.3MB in the beginning and 34.4MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,203 INFO L158 Benchmark]: RCFGBuilder took 2550.32ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 34.1MB in the beginning and 73.5MB in the end (delta: -39.4MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,204 INFO L158 Benchmark]: TraceAbstraction took 70157.15ms. Allocated memory was 111.1MB in the beginning and 792.7MB in the end (delta: 681.6MB). Free memory was 72.8MB in the beginning and 657.3MB in the end (delta: -584.5MB). Peak memory consumption was 596.1MB. Max. memory is 16.1GB. [2022-07-13 11:42:55,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory was 39.6MB in the beginning and 39.5MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.05ms. Allocated memory is still 92.3MB. Free memory was 53.6MB in the beginning and 46.4MB in the end (delta: 7.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.47ms. Allocated memory is still 92.3MB. Free memory was 46.4MB in the beginning and 41.3MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 93.18ms. Allocated memory is still 92.3MB. Free memory was 41.3MB in the beginning and 34.4MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2550.32ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 34.1MB in the beginning and 73.5MB in the end (delta: -39.4MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * TraceAbstraction took 70157.15ms. Allocated memory was 111.1MB in the beginning and 792.7MB in the end (delta: 681.6MB). Free memory was 72.8MB in the beginning and 657.3MB in the end (delta: -584.5MB). Peak memory consumption was 596.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_srvr.blast.14.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:42:56,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:42:56,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:42:56,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:42:56,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:42:56,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:42:56,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:42:56,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:42:56,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:42:56,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:42:56,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:42:56,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:42:56,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:42:56,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:42:56,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:42:56,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:42:56,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:42:56,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:42:56,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:42:56,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:42:56,710 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:42:56,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:42:56,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:42:56,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:42:56,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:42:56,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:42:56,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:42:56,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:42:56,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:42:56,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:42:56,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:42:56,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:42:56,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:42:56,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:42:56,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:42:56,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:42:56,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:42:56,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:42:56,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:42:56,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:42:56,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:42:56,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:42:56,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 11:42:56,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:42:56,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:42:56,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:42:56,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:42:56,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:42:56,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:42:56,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:42:56,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:42:56,759 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:42:56,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:42:56,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:42:56,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:42:56,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:42:56,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:42:56,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:42:56,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:42:56,768 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 11:42:56,768 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 11:42:56,768 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:42:56,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:42:56,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:42:56,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:42:56,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:42:56,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:42:56,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:42:56,770 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 11:42:56,771 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2022-07-13 11:42:56,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:42:57,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:42:57,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:42:57,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:42:57,021 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:42:57,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:42:57,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05784e0f7/5fb97308b5524c9c974ad5a0a68134bb/FLAG72edc4693 [2022-07-13 11:42:57,505 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:42:57,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:42:57,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05784e0f7/5fb97308b5524c9c974ad5a0a68134bb/FLAG72edc4693 [2022-07-13 11:42:57,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05784e0f7/5fb97308b5524c9c974ad5a0a68134bb [2022-07-13 11:42:57,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:42:57,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:42:57,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:42:57,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:42:57,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:42:57,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:42:57" (1/1) ... [2022-07-13 11:42:57,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d35faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:57, skipping insertion in model container [2022-07-13 11:42:57,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:42:57" (1/1) ... [2022-07-13 11:42:57,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:42:57,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:42:58,210 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_srvr.blast.14.i.cil-2.c[76259,76272] [2022-07-13 11:42:58,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:42:58,233 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-13 11:42:58,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:42:58,347 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_srvr.blast.14.i.cil-2.c[76259,76272] [2022-07-13 11:42:58,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:42:58,353 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:42:58,429 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_srvr.blast.14.i.cil-2.c[76259,76272] [2022-07-13 11:42:58,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:42:58,448 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:42:58,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58 WrapperNode [2022-07-13 11:42:58,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:42:58,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:42:58,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:42:58,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:42:58,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,516 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 773 [2022-07-13 11:42:58,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:42:58,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:42:58,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:42:58,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:42:58,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:42:58,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:42:58,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:42:58,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:42:58,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (1/1) ... [2022-07-13 11:42:58,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:42:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:42:58,642 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) [2022-07-13 11:42:58,667 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 [2022-07-13 11:42:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:42:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:42:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:42:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 11:42:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:42:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:42:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:42:58,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:42:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 11:42:58,833 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:42:58,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:42:58,854 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:43:05,647 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-13 11:43:05,647 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-13 11:43:05,647 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:43:05,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:43:05,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:43:05,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:43:05 BoogieIcfgContainer [2022-07-13 11:43:05,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:43:05,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:43:05,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:43:05,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:43:05,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:42:57" (1/3) ... [2022-07-13 11:43:05,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624361a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:43:05, skipping insertion in model container [2022-07-13 11:43:05,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:42:58" (2/3) ... [2022-07-13 11:43:05,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624361a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:43:05, skipping insertion in model container [2022-07-13 11:43:05,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:43:05" (3/3) ... [2022-07-13 11:43:05,667 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2022-07-13 11:43:05,677 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:43:05,677 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:43:05,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:43:05,741 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b103371, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2fcb53e3 [2022-07-13 11:43:05,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:43:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:43:05,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:05,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:05,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2022-07-13 11:43:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803936801] [2022-07-13 11:43:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:05,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:05,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:05,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:43:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 11:43:06,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:06,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 11:43:06,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 11:43:07,200 INFO L356 Elim1Store]: treesize reduction 1496, result has 4.7 percent of original size [2022-07-13 11:43:07,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 85 [2022-07-13 11:43:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 85 [2022-07-13 11:43:07,445 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:07,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:07,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:07,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:43:07,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:43:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:07,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:07,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:07,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803936801] [2022-07-13 11:43:07,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803936801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:07,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:07,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:43:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224507493] [2022-07-13 11:43:07,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:07,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:43:07,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:43:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:07,562 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:09,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:11,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:19,951 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2022-07-13 11:43:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:43:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 11:43:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:19,960 INFO L225 Difference]: With dead ends: 311 [2022-07-13 11:43:19,960 INFO L226 Difference]: Without dead ends: 142 [2022-07-13 11:43:19,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:43:19,965 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 10 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:19,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 865 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2022-07-13 11:43:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-13 11:43:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-13 11:43:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.553191489361702) internal successors, (219), 141 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 219 transitions. [2022-07-13 11:43:20,009 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 219 transitions. Word has length 44 [2022-07-13 11:43:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:20,010 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 219 transitions. [2022-07-13 11:43:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 219 transitions. [2022-07-13 11:43:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:43:20,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:20,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:20,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:20,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1166662538, now seen corresponding path program 1 times [2022-07-13 11:43:20,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:20,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885468840] [2022-07-13 11:43:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:20,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:20,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:20,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:43:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:21,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:43:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:43:21,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:43:21,322 INFO L356 Elim1Store]: treesize reduction 1124, result has 5.4 percent of original size [2022-07-13 11:43:21,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 74 [2022-07-13 11:43:21,680 INFO L356 Elim1Store]: treesize reduction 825, result has 7.2 percent of original size [2022-07-13 11:43:21,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2022-07-13 11:43:21,941 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:21,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 23 [2022-07-13 11:43:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:21,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:21,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885468840] [2022-07-13 11:43:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885468840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368701275] [2022-07-13 11:43:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:21,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:21,965 INFO L87 Difference]: Start difference. First operand 142 states and 219 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:23,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:28,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:30,468 INFO L93 Difference]: Finished difference Result 302 states and 466 transitions. [2022-07-13 11:43:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:43:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 11:43:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:30,471 INFO L225 Difference]: With dead ends: 302 [2022-07-13 11:43:30,471 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 11:43:30,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:30,472 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 22 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:30,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 497 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-07-13 11:43:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 11:43:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2022-07-13 11:43:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 152 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2022-07-13 11:43:30,494 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 44 [2022-07-13 11:43:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:30,494 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2022-07-13 11:43:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2022-07-13 11:43:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:43:30,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:30,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:30,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:30,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -616728635, now seen corresponding path program 1 times [2022-07-13 11:43:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:30,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271913029] [2022-07-13 11:43:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:30,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:30,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:30,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:30,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:43:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:43:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:31,834 INFO L356 Elim1Store]: treesize reduction 1104, result has 5.5 percent of original size [2022-07-13 11:43:31,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:43:31,949 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:31,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:31,994 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:31,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:43:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:32,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:32,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:32,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271913029] [2022-07-13 11:43:32,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271913029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:32,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:32,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582505418] [2022-07-13 11:43:32,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:32,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:32,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:32,014 INFO L87 Difference]: Start difference. First operand 153 states and 238 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:34,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:38,056 INFO L93 Difference]: Finished difference Result 296 states and 458 transitions. [2022-07-13 11:43:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:43:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 11:43:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:38,059 INFO L225 Difference]: With dead ends: 296 [2022-07-13 11:43:38,059 INFO L226 Difference]: Without dead ends: 164 [2022-07-13 11:43:38,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:38,060 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 17 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:38,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 526 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 1 Unknown, 20 Unchecked, 6.0s Time] [2022-07-13 11:43:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-13 11:43:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2022-07-13 11:43:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5592105263157894) internal successors, (237), 152 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 237 transitions. [2022-07-13 11:43:38,072 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 237 transitions. Word has length 57 [2022-07-13 11:43:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 237 transitions. [2022-07-13 11:43:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 237 transitions. [2022-07-13 11:43:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:43:38,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:38,074 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:38,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:38,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2106199760, now seen corresponding path program 1 times [2022-07-13 11:43:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857144274] [2022-07-13 11:43:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:38,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:43:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:43:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:39,590 INFO L356 Elim1Store]: treesize reduction 1105, result has 5.5 percent of original size [2022-07-13 11:43:39,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:43:39,731 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:39,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:39,762 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:39,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:43:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:39,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:39,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857144274] [2022-07-13 11:43:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857144274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:39,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:39,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896475062] [2022-07-13 11:43:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:39,783 INFO L87 Difference]: Start difference. First operand 153 states and 237 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:41,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:43,384 INFO L93 Difference]: Finished difference Result 297 states and 461 transitions. [2022-07-13 11:43:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:43:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 11:43:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:43,386 INFO L225 Difference]: With dead ends: 297 [2022-07-13 11:43:43,386 INFO L226 Difference]: Without dead ends: 165 [2022-07-13 11:43:43,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:43,387 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 18 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:43,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 524 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 1 Unknown, 15 Unchecked, 3.6s Time] [2022-07-13 11:43:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-13 11:43:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-13 11:43:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5426829268292683) internal successors, (253), 164 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 253 transitions. [2022-07-13 11:43:43,393 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 253 transitions. Word has length 58 [2022-07-13 11:43:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:43,393 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 253 transitions. [2022-07-13 11:43:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 253 transitions. [2022-07-13 11:43:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:43:43,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:43,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:43,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:43,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1058688956, now seen corresponding path program 1 times [2022-07-13 11:43:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104631786] [2022-07-13 11:43:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:43,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:43,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:43,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:43:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:43:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:44,866 INFO L356 Elim1Store]: treesize reduction 1105, result has 5.5 percent of original size [2022-07-13 11:43:44,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:43:44,969 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:44,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:45,016 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:45,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:43:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:45,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:45,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104631786] [2022-07-13 11:43:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104631786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:45,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875466140] [2022-07-13 11:43:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:45,038 INFO L87 Difference]: Start difference. First operand 165 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:47,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:48,703 INFO L93 Difference]: Finished difference Result 310 states and 478 transitions. [2022-07-13 11:43:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:43:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 11:43:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:48,708 INFO L225 Difference]: With dead ends: 310 [2022-07-13 11:43:48,709 INFO L226 Difference]: Without dead ends: 166 [2022-07-13 11:43:48,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:48,710 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 18 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:48,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 549 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 1 Unknown, 16 Unchecked, 3.6s Time] [2022-07-13 11:43:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-13 11:43:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-13 11:43:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 165 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 253 transitions. [2022-07-13 11:43:48,717 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 253 transitions. Word has length 58 [2022-07-13 11:43:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:48,717 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 253 transitions. [2022-07-13 11:43:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 253 transitions. [2022-07-13 11:43:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:43:48,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:48,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:48,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:48,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash -77177339, now seen corresponding path program 1 times [2022-07-13 11:43:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:48,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787744447] [2022-07-13 11:43:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:48,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:48,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:43:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:43:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:50,054 INFO L356 Elim1Store]: treesize reduction 1104, result has 5.5 percent of original size [2022-07-13 11:43:50,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:43:50,163 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:50,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:50,212 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:50,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:43:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:50,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:50,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:50,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787744447] [2022-07-13 11:43:50,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787744447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:50,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:50,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:50,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351140151] [2022-07-13 11:43:50,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:50,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:50,240 INFO L87 Difference]: Start difference. First operand 166 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:52,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:53,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:43:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:43:57,321 INFO L93 Difference]: Finished difference Result 323 states and 492 transitions. [2022-07-13 11:43:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:43:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 11:43:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:43:57,324 INFO L225 Difference]: With dead ends: 323 [2022-07-13 11:43:57,324 INFO L226 Difference]: Without dead ends: 178 [2022-07-13 11:43:57,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:43:57,325 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 16 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:43:57,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 523 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 1 Unknown, 23 Unchecked, 7.0s Time] [2022-07-13 11:43:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-13 11:43:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-07-13 11:43:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5272727272727273) internal successors, (252), 165 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2022-07-13 11:43:57,329 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 58 [2022-07-13 11:43:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:43:57,329 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2022-07-13 11:43:57,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:43:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2022-07-13 11:43:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:43:57,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:43:57,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:43:57,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:43:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:43:57,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:43:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:43:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1243675973, now seen corresponding path program 1 times [2022-07-13 11:43:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:43:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937192204] [2022-07-13 11:43:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:43:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:43:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:43:57,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:43:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:43:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:43:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:43:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:43:58,644 INFO L356 Elim1Store]: treesize reduction 1104, result has 5.5 percent of original size [2022-07-13 11:43:58,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:43:58,770 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:43:58,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:43:58,811 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:43:58,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:43:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:43:58,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:43:58,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:43:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937192204] [2022-07-13 11:43:58,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937192204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:43:58,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:43:58,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:43:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916318994] [2022-07-13 11:43:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:43:58,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:43:58,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:43:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:43:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:43:58,837 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:00,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:05,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:05,524 INFO L93 Difference]: Finished difference Result 321 states and 489 transitions. [2022-07-13 11:44:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:05,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-07-13 11:44:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:05,526 INFO L225 Difference]: With dead ends: 321 [2022-07-13 11:44:05,526 INFO L226 Difference]: Without dead ends: 176 [2022-07-13 11:44:05,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:05,527 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 15 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:05,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 513 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 1 Unknown, 20 Unchecked, 6.7s Time] [2022-07-13 11:44:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-13 11:44:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2022-07-13 11:44:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 165 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2022-07-13 11:44:05,531 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 58 [2022-07-13 11:44:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:05,531 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2022-07-13 11:44:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2022-07-13 11:44:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:44:05,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:05,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:44:05,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:44:05,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:05,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash 967076732, now seen corresponding path program 1 times [2022-07-13 11:44:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:05,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543731848] [2022-07-13 11:44:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:05,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:05,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:05,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:05,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:44:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:06,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:44:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:07,026 INFO L356 Elim1Store]: treesize reduction 1105, result has 5.5 percent of original size [2022-07-13 11:44:07,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:44:07,136 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:44:07,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:44:07,166 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:07,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:07,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:07,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543731848] [2022-07-13 11:44:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543731848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:07,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143008888] [2022-07-13 11:44:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:07,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:07,192 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:09,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:10,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:11,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:12,059 INFO L93 Difference]: Finished difference Result 312 states and 477 transitions. [2022-07-13 11:44:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 11:44:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:12,062 INFO L225 Difference]: With dead ends: 312 [2022-07-13 11:44:12,062 INFO L226 Difference]: Without dead ends: 167 [2022-07-13 11:44:12,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:12,063 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 18 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:12,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 520 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 89 Invalid, 1 Unknown, 17 Unchecked, 4.8s Time] [2022-07-13 11:44:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-13 11:44:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-07-13 11:44:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5120481927710843) internal successors, (251), 166 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 251 transitions. [2022-07-13 11:44:12,069 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 251 transitions. Word has length 59 [2022-07-13 11:44:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:12,070 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 251 transitions. [2022-07-13 11:44:12,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 251 transitions. [2022-07-13 11:44:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:44:12,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:12,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:44:12,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:44:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:12,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:12,274 INFO L85 PathProgramCache]: Analyzing trace with hash 800295895, now seen corresponding path program 1 times [2022-07-13 11:44:12,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460055520] [2022-07-13 11:44:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:12,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 11:44:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:44:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:14,011 INFO L356 Elim1Store]: treesize reduction 1105, result has 5.5 percent of original size [2022-07-13 11:44:14,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:44:14,198 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:44:14,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:44:14,263 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:14,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:14,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:14,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460055520] [2022-07-13 11:44:14,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460055520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:14,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:14,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980421332] [2022-07-13 11:44:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:14,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:14,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:14,292 INFO L87 Difference]: Start difference. First operand 167 states and 251 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) [2022-07-13 11:44:16,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:18,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:18,799 INFO L93 Difference]: Finished difference Result 314 states and 478 transitions. [2022-07-13 11:44:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:18,801 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 60 [2022-07-13 11:44:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:18,801 INFO L225 Difference]: With dead ends: 314 [2022-07-13 11:44:18,801 INFO L226 Difference]: Without dead ends: 168 [2022-07-13 11:44:18,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:18,802 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 18 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:18,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 525 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 1 Unknown, 18 Unchecked, 4.5s Time] [2022-07-13 11:44:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-13 11:44:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-07-13 11:44:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.5029940119760479) internal successors, (251), 167 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 251 transitions. [2022-07-13 11:44:18,805 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 251 transitions. Word has length 60 [2022-07-13 11:44:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:18,805 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 251 transitions. [2022-07-13 11:44:18,806 INFO L496 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) [2022-07-13 11:44:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 251 transitions. [2022-07-13 11:44:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 11:44:18,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:18,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:44:18,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-13 11:44:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:19,007 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1696711945, now seen corresponding path program 1 times [2022-07-13 11:44:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273417826] [2022-07-13 11:44:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:19,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:19,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 11:44:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:44:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:20,338 INFO L356 Elim1Store]: treesize reduction 1105, result has 5.5 percent of original size [2022-07-13 11:44:20,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 73 [2022-07-13 11:44:20,448 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:44:20,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:44:20,500 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:20,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:20,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:20,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273417826] [2022-07-13 11:44:20,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273417826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:20,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:20,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916767989] [2022-07-13 11:44:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:20,518 INFO L87 Difference]: Start difference. First operand 168 states and 251 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:22,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:24,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:25,121 INFO L93 Difference]: Finished difference Result 316 states and 479 transitions. [2022-07-13 11:44:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 11:44:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:25,124 INFO L225 Difference]: With dead ends: 316 [2022-07-13 11:44:25,124 INFO L226 Difference]: Without dead ends: 169 [2022-07-13 11:44:25,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:25,125 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 18 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:25,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 516 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 91 Invalid, 1 Unknown, 19 Unchecked, 4.6s Time] [2022-07-13 11:44:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-13 11:44:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-13 11:44:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.494047619047619) internal successors, (251), 168 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 251 transitions. [2022-07-13 11:44:25,128 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 251 transitions. Word has length 61 [2022-07-13 11:44:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:25,129 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 251 transitions. [2022-07-13 11:44:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 251 transitions. [2022-07-13 11:44:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 11:44:25,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:25,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:44:25,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-13 11:44:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:25,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1023713137, now seen corresponding path program 1 times [2022-07-13 11:44:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46078441] [2022-07-13 11:44:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:25,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:25,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:25,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 11:44:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:44:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:44:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:44:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:44:26,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:44:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:44:26,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:44:26,598 INFO L356 Elim1Store]: treesize reduction 1109, result has 5.5 percent of original size [2022-07-13 11:44:26,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 73 [2022-07-13 11:44:26,892 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:26,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 22 [2022-07-13 11:44:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:26,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:26,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46078441] [2022-07-13 11:44:26,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46078441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:26,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:26,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:26,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703257275] [2022-07-13 11:44:26,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:26,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:26,914 INFO L87 Difference]: Start difference. First operand 169 states and 251 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:28,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:31,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:32,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:35,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:36,237 INFO L93 Difference]: Finished difference Result 349 states and 525 transitions. [2022-07-13 11:44:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 11:44:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:36,240 INFO L225 Difference]: With dead ends: 349 [2022-07-13 11:44:36,240 INFO L226 Difference]: Without dead ends: 201 [2022-07-13 11:44:36,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:36,241 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 22 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:36,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 535 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2022-07-13 11:44:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-13 11:44:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2022-07-13 11:44:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4947368421052631) internal successors, (284), 190 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2022-07-13 11:44:36,245 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 61 [2022-07-13 11:44:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:36,245 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2022-07-13 11:44:36,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2022-07-13 11:44:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 11:44:36,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:36,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-13 11:44:36,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:44:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:36,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash 545325792, now seen corresponding path program 1 times [2022-07-13 11:44:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:36,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87000284] [2022-07-13 11:44:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:36,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:36,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:36,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:36,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 11:44:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:44:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:37,719 INFO L356 Elim1Store]: treesize reduction 1100, result has 5.5 percent of original size [2022-07-13 11:44:37,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 73 [2022-07-13 11:44:37,766 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:37,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:37,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:37,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87000284] [2022-07-13 11:44:37,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87000284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:37,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:37,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116496305] [2022-07-13 11:44:37,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:37,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:37,782 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:39,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:44,577 INFO L93 Difference]: Finished difference Result 361 states and 544 transitions. [2022-07-13 11:44:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-07-13 11:44:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:44,580 INFO L225 Difference]: With dead ends: 361 [2022-07-13 11:44:44,580 INFO L226 Difference]: Without dead ends: 191 [2022-07-13 11:44:44,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:44,581 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 10 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:44,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 547 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 1 Unknown, 14 Unchecked, 6.8s Time] [2022-07-13 11:44:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-13 11:44:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-07-13 11:44:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4894736842105263) internal successors, (283), 190 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 283 transitions. [2022-07-13 11:44:44,589 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 283 transitions. Word has length 74 [2022-07-13 11:44:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 283 transitions. [2022-07-13 11:44:44,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 283 transitions. [2022-07-13 11:44:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 11:44:44,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:44,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-13 11:44:44,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:44:44,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:44,791 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1586771530, now seen corresponding path program 1 times [2022-07-13 11:44:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091881634] [2022-07-13 11:44:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:44,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:44,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 11:44:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:44:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:46,098 INFO L356 Elim1Store]: treesize reduction 1100, result has 5.5 percent of original size [2022-07-13 11:44:46,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 73 [2022-07-13 11:44:46,143 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:46,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:46,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:46,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:46,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091881634] [2022-07-13 11:44:46,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091881634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:46,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801595399] [2022-07-13 11:44:46,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:46,160 INFO L87 Difference]: Start difference. First operand 191 states and 283 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:48,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:49,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:44:53,813 INFO L93 Difference]: Finished difference Result 363 states and 544 transitions. [2022-07-13 11:44:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:44:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-07-13 11:44:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:44:53,815 INFO L225 Difference]: With dead ends: 363 [2022-07-13 11:44:53,816 INFO L226 Difference]: Without dead ends: 193 [2022-07-13 11:44:53,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:44:53,817 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 11 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:44:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 543 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 1 Unknown, 18 Unchecked, 7.6s Time] [2022-07-13 11:44:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-13 11:44:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2022-07-13 11:44:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 282 transitions. [2022-07-13 11:44:53,821 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 282 transitions. Word has length 75 [2022-07-13 11:44:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:44:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 282 transitions. [2022-07-13 11:44:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 282 transitions. [2022-07-13 11:44:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 11:44:53,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:44:53,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:44:53,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-13 11:44:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:44:54,040 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:44:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:44:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1387342454, now seen corresponding path program 1 times [2022-07-13 11:44:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:44:54,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020618678] [2022-07-13 11:44:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:44:54,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:44:54,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:44:54,042 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:44:54,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 11:44:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:44:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:44:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:44:55,430 INFO L356 Elim1Store]: treesize reduction 1100, result has 5.5 percent of original size [2022-07-13 11:44:55,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 73 [2022-07-13 11:44:55,474 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:44:55,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:44:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:44:55,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:44:55,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:44:55,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020618678] [2022-07-13 11:44:55,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020618678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:44:55,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:44:55,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:44:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485973077] [2022-07-13 11:44:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:44:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:44:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:44:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:44:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:44:55,499 INFO L87 Difference]: Start difference. First operand 191 states and 282 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:44:57,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:44:58,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:02,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:02,793 INFO L93 Difference]: Finished difference Result 361 states and 540 transitions. [2022-07-13 11:45:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-07-13 11:45:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:02,796 INFO L225 Difference]: With dead ends: 361 [2022-07-13 11:45:02,796 INFO L226 Difference]: Without dead ends: 191 [2022-07-13 11:45:02,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:02,796 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 10 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:02,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 551 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 1 Unknown, 17 Unchecked, 7.3s Time] [2022-07-13 11:45:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-13 11:45:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-07-13 11:45:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4789473684210526) internal successors, (281), 190 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 281 transitions. [2022-07-13 11:45:02,800 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 281 transitions. Word has length 75 [2022-07-13 11:45:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:02,800 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 281 transitions. [2022-07-13 11:45:02,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 281 transitions. [2022-07-13 11:45:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 11:45:02,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:02,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:45:02,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-13 11:45:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:03,011 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1369586491, now seen corresponding path program 1 times [2022-07-13 11:45:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764016624] [2022-07-13 11:45:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:03,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:03,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:03,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:03,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 11:45:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:45:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:04,397 INFO L356 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2022-07-13 11:45:04,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 11:45:04,513 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:45:04,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 51 [2022-07-13 11:45:04,618 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:04,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 15 [2022-07-13 11:45:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:04,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:04,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764016624] [2022-07-13 11:45:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764016624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:04,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:04,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:04,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494834727] [2022-07-13 11:45:04,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:04,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:04,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:04,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:04,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:04,634 INFO L87 Difference]: Start difference. First operand 191 states and 281 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:06,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:09,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:13,184 INFO L93 Difference]: Finished difference Result 443 states and 666 transitions. [2022-07-13 11:45:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:13,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 83 [2022-07-13 11:45:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:13,187 INFO L225 Difference]: With dead ends: 443 [2022-07-13 11:45:13,187 INFO L226 Difference]: Without dead ends: 273 [2022-07-13 11:45:13,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:13,187 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 70 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:13,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 505 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 68 Unchecked, 8.5s Time] [2022-07-13 11:45:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-13 11:45:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 231. [2022-07-13 11:45:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.517391304347826) internal successors, (349), 230 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 349 transitions. [2022-07-13 11:45:13,203 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 349 transitions. Word has length 83 [2022-07-13 11:45:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:13,204 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 349 transitions. [2022-07-13 11:45:13,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 349 transitions. [2022-07-13 11:45:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 11:45:13,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:13,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:45:13,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-13 11:45:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:13,426 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2220807, now seen corresponding path program 1 times [2022-07-13 11:45:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:13,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903893825] [2022-07-13 11:45:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:13,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 11:45:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:45:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:45:14,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:45:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:45:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:45:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:45:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:45:14,607 INFO L356 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2022-07-13 11:45:14,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2022-07-13 11:45:14,887 INFO L356 Elim1Store]: treesize reduction 825, result has 7.2 percent of original size [2022-07-13 11:45:14,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2022-07-13 11:45:15,178 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:15,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 23 [2022-07-13 11:45:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:15,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:15,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903893825] [2022-07-13 11:45:15,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903893825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:15,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:15,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:15,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732779150] [2022-07-13 11:45:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:15,194 INFO L87 Difference]: Start difference. First operand 231 states and 349 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:17,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:19,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:21,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:26,496 INFO L93 Difference]: Finished difference Result 480 states and 732 transitions. [2022-07-13 11:45:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 83 [2022-07-13 11:45:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:26,499 INFO L225 Difference]: With dead ends: 480 [2022-07-13 11:45:26,499 INFO L226 Difference]: Without dead ends: 270 [2022-07-13 11:45:26,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:26,500 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 30 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:26,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 609 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 11.3s Time] [2022-07-13 11:45:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-13 11:45:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 255. [2022-07-13 11:45:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5196850393700787) internal successors, (386), 254 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 386 transitions. [2022-07-13 11:45:26,504 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 386 transitions. Word has length 83 [2022-07-13 11:45:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:26,504 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 386 transitions. [2022-07-13 11:45:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 386 transitions. [2022-07-13 11:45:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 11:45:26,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:26,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:45:26,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:45:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:26,705 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -733688034, now seen corresponding path program 1 times [2022-07-13 11:45:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:26,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958145142] [2022-07-13 11:45:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:26,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:26,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:26,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 11:45:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:27,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:45:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:27,826 INFO L356 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2022-07-13 11:45:27,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 11:45:27,951 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:45:27,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 51 [2022-07-13 11:45:28,076 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:28,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 15 [2022-07-13 11:45:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:28,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:28,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:28,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958145142] [2022-07-13 11:45:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958145142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:28,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482632945] [2022-07-13 11:45:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:28,097 INFO L87 Difference]: Start difference. First operand 255 states and 386 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:30,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:32,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:36,700 INFO L93 Difference]: Finished difference Result 532 states and 809 transitions. [2022-07-13 11:45:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 84 [2022-07-13 11:45:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:36,702 INFO L225 Difference]: With dead ends: 532 [2022-07-13 11:45:36,702 INFO L226 Difference]: Without dead ends: 298 [2022-07-13 11:45:36,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:36,703 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 70 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:36,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 546 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 1 Unknown, 69 Unchecked, 8.6s Time] [2022-07-13 11:45:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-13 11:45:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2022-07-13 11:45:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5176470588235293) internal successors, (387), 255 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 387 transitions. [2022-07-13 11:45:36,709 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 387 transitions. Word has length 84 [2022-07-13 11:45:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:36,709 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 387 transitions. [2022-07-13 11:45:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 387 transitions. [2022-07-13 11:45:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 11:45:36,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:36,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:45:36,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-13 11:45:36,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:36,924 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1370497100, now seen corresponding path program 1 times [2022-07-13 11:45:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:36,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744047215] [2022-07-13 11:45:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:36,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:36,926 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:36,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-13 11:45:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:45:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:38,146 INFO L356 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2022-07-13 11:45:38,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 11:45:38,252 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:45:38,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 51 [2022-07-13 11:45:38,286 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:38,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 15 [2022-07-13 11:45:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:38,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:38,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:38,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744047215] [2022-07-13 11:45:38,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744047215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:38,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:38,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630330637] [2022-07-13 11:45:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:38,302 INFO L87 Difference]: Start difference. First operand 256 states and 387 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:40,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:43,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:45,214 INFO L93 Difference]: Finished difference Result 491 states and 750 transitions. [2022-07-13 11:45:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:45,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 96 [2022-07-13 11:45:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:45,216 INFO L225 Difference]: With dead ends: 491 [2022-07-13 11:45:45,216 INFO L226 Difference]: Without dead ends: 256 [2022-07-13 11:45:45,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:45,220 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 10 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:45,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 571 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 1 Unknown, 17 Unchecked, 6.9s Time] [2022-07-13 11:45:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-13 11:45:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-07-13 11:45:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5137254901960784) internal successors, (386), 255 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2022-07-13 11:45:45,224 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 96 [2022-07-13 11:45:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:45,225 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2022-07-13 11:45:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2022-07-13 11:45:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 11:45:45,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:45,226 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 11:45:45,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-13 11:45:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:45,439 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -926596426, now seen corresponding path program 1 times [2022-07-13 11:45:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:45,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014771702] [2022-07-13 11:45:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:45,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:45,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:45,441 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:45,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-13 11:45:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:45:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:46,816 INFO L356 Elim1Store]: treesize reduction 182, result has 13.3 percent of original size [2022-07-13 11:45:46,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 37 [2022-07-13 11:45:46,931 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:45:46,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 49 [2022-07-13 11:45:46,970 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:46,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 13 [2022-07-13 11:45:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:46,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:46,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:46,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014771702] [2022-07-13 11:45:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014771702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:46,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502333599] [2022-07-13 11:45:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:46,988 INFO L87 Difference]: Start difference. First operand 256 states and 386 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:49,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:52,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:45:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:45:53,695 INFO L93 Difference]: Finished difference Result 491 states and 748 transitions. [2022-07-13 11:45:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:45:53,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 96 [2022-07-13 11:45:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:45:53,698 INFO L225 Difference]: With dead ends: 491 [2022-07-13 11:45:53,698 INFO L226 Difference]: Without dead ends: 256 [2022-07-13 11:45:53,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:45:53,699 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 10 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:45:53,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 573 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 1 Unknown, 17 Unchecked, 6.7s Time] [2022-07-13 11:45:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-13 11:45:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-07-13 11:45:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 255 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2022-07-13 11:45:53,704 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 96 [2022-07-13 11:45:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:45:53,704 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2022-07-13 11:45:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2022-07-13 11:45:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 11:45:53,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:45:53,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-07-13 11:45:53,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-13 11:45:53,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:45:53,919 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:45:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:45:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1969163274, now seen corresponding path program 1 times [2022-07-13 11:45:53,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:45:53,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487293259] [2022-07-13 11:45:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:45:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:45:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:45:53,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:45:53,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-13 11:45:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:45:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 11:45:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:45:55,175 INFO L356 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2022-07-13 11:45:55,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 11:45:55,290 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-13 11:45:55,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 51 [2022-07-13 11:45:55,344 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:45:55,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 15 [2022-07-13 11:45:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:45:55,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:45:55,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:45:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487293259] [2022-07-13 11:45:55,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487293259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:45:55,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:45:55,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:45:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341099643] [2022-07-13 11:45:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:45:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:45:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:45:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:45:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:45:55,366 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:45:57,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:46:00,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []