./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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.07.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:16:00,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:16:00,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:16:00,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:16:00,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:16:00,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:16:00,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:16:00,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:16:00,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:16:00,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:16:00,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:16:00,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:16:00,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:16:00,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:16:00,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:16:00,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:16:00,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:16:00,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:16:00,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:16:00,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:16:00,750 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:16:00,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:16:00,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:16:00,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:16:00,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:16:00,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:16:00,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:16:00,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:16:00,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:16:00,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:16:00,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:16:00,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:16:00,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:16:00,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:16:00,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:16:00,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:16:00,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:16:00,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:16:00,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:16:00,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:16:00,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:16:00,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:16:00,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:16:00,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:16:00,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:16:00,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:16:00,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:16:00,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:16:00,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:16:00,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:16:00,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:16:00,806 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:16:00,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:16:00,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:16:00,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:16:00,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:16:00,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:16:00,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:16:00,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:16:00,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:16:00,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:16:00,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:16:00,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:16:00,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:16:00,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:16:00,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:16:00,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:16:00,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:16:00,811 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:16:00,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:16:00,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:16:00,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2022-07-22 11:16:01,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:16:01,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:16:01,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:16:01,086 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:16:01,087 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:16:01,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:16:01,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850685a7f/8135fe9b957f4598a77f0cce6160d474/FLAG7245d46af [2022-07-22 11:16:01,633 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:16:01,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:16:01,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850685a7f/8135fe9b957f4598a77f0cce6160d474/FLAG7245d46af [2022-07-22 11:16:01,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850685a7f/8135fe9b957f4598a77f0cce6160d474 [2022-07-22 11:16:01,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:16:01,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:16:01,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:16:01,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:16:01,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:16:01,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:16:01" (1/1) ... [2022-07-22 11:16:01,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657d69c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:01, skipping insertion in model container [2022-07-22 11:16:01,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:16:01" (1/1) ... [2022-07-22 11:16:01,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:16:02,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:16:02,396 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.07.i.cil-1.c[74369,74382] [2022-07-22 11:16:02,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:16:02,427 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:16:02,539 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.07.i.cil-1.c[74369,74382] [2022-07-22 11:16:02,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:16:02,562 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:16:02,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02 WrapperNode [2022-07-22 11:16:02,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:16:02,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:16:02,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:16:02,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:16:02,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,662 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2022-07-22 11:16:02,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:16:02,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:16:02,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:16:02,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:16:02,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:16:02,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:16:02,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:16:02,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:16:02,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (1/1) ... [2022-07-22 11:16:02,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:16:02,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:16:02,808 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) [2022-07-22 11:16:02,822 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 [2022-07-22 11:16:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:16:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:16:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:16:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:16:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:16:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:16:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:16:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:16:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:16:02,965 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:16:02,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:16:02,982 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:16:04,138 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-22 11:16:04,140 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-22 11:16:04,140 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:16:04,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:16:04,151 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:16:04,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:16:04 BoogieIcfgContainer [2022-07-22 11:16:04,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:16:04,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:16:04,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:16:04,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:16:04,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:16:01" (1/3) ... [2022-07-22 11:16:04,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493b000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:16:04, skipping insertion in model container [2022-07-22 11:16:04,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:16:02" (2/3) ... [2022-07-22 11:16:04,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493b000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:16:04, skipping insertion in model container [2022-07-22 11:16:04,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:16:04" (3/3) ... [2022-07-22 11:16:04,163 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:16:04,176 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:16:04,176 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:16:04,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:16:04,256 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@e5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55ae1b3d [2022-07-22 11:16:04,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:16:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 11:16:04,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:04,276 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] [2022-07-22 11:16:04,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2022-07-22 11:16:04,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:04,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369071843] [2022-07-22 11:16:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:04,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369071843] [2022-07-22 11:16:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369071843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:04,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:04,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825607468] [2022-07-22 11:16:04,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:04,828 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:05,724 INFO L93 Difference]: Finished difference Result 419 states and 713 transitions. [2022-07-22 11:16:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 11:16:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:05,735 INFO L225 Difference]: With dead ends: 419 [2022-07-22 11:16:05,738 INFO L226 Difference]: Without dead ends: 254 [2022-07-22 11:16:05,743 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 [2022-07-22 11:16:05,747 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 165 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:05,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 439 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:16:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-22 11:16:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 165. [2022-07-22 11:16:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5853658536585367) internal successors, (260), 164 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 260 transitions. [2022-07-22 11:16:05,794 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 260 transitions. Word has length 37 [2022-07-22 11:16:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:05,794 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 260 transitions. [2022-07-22 11:16:05,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 260 transitions. [2022-07-22 11:16:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 11:16:05,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:05,797 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] [2022-07-22 11:16:05,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:16:05,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1559591930, now seen corresponding path program 1 times [2022-07-22 11:16:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:05,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780158933] [2022-07-22 11:16:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780158933] [2022-07-22 11:16:05,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780158933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:05,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:05,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969360284] [2022-07-22 11:16:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:05,947 INFO L87 Difference]: Start difference. First operand 165 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:06,541 INFO L93 Difference]: Finished difference Result 348 states and 547 transitions. [2022-07-22 11:16:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2022-07-22 11:16:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:06,543 INFO L225 Difference]: With dead ends: 348 [2022-07-22 11:16:06,544 INFO L226 Difference]: Without dead ends: 193 [2022-07-22 11:16:06,544 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 [2022-07-22 11:16:06,545 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 22 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:06,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 469 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:16:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-22 11:16:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2022-07-22 11:16:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5942857142857143) internal successors, (279), 175 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 279 transitions. [2022-07-22 11:16:06,557 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 279 transitions. Word has length 38 [2022-07-22 11:16:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:06,558 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 279 transitions. [2022-07-22 11:16:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 279 transitions. [2022-07-22 11:16:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 11:16:06,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:06,560 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] [2022-07-22 11:16:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:16:06,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:06,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash 103815440, now seen corresponding path program 1 times [2022-07-22 11:16:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907764190] [2022-07-22 11:16:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907764190] [2022-07-22 11:16:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907764190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:06,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927196213] [2022-07-22 11:16:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:06,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:06,770 INFO L87 Difference]: Start difference. First operand 176 states and 279 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:07,586 INFO L93 Difference]: Finished difference Result 476 states and 757 transitions. [2022-07-22 11:16:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2022-07-22 11:16:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:07,589 INFO L225 Difference]: With dead ends: 476 [2022-07-22 11:16:07,589 INFO L226 Difference]: Without dead ends: 321 [2022-07-22 11:16:07,590 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 [2022-07-22 11:16:07,590 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 143 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 612 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:16:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-22 11:16:07,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 208. [2022-07-22 11:16:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.5942028985507246) internal successors, (330), 207 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 330 transitions. [2022-07-22 11:16:07,605 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 330 transitions. Word has length 51 [2022-07-22 11:16:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:07,605 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 330 transitions. [2022-07-22 11:16:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 330 transitions. [2022-07-22 11:16:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:16:07,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:07,607 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] [2022-07-22 11:16:07,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:16:07,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1022264289, now seen corresponding path program 1 times [2022-07-22 11:16:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:07,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51955181] [2022-07-22 11:16:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51955181] [2022-07-22 11:16:07,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51955181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:07,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:07,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32228175] [2022-07-22 11:16:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:07,746 INFO L87 Difference]: Start difference. First operand 208 states and 330 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:08,658 INFO L93 Difference]: Finished difference Result 495 states and 782 transitions. [2022-07-22 11:16:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 11:16:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:08,661 INFO L225 Difference]: With dead ends: 495 [2022-07-22 11:16:08,662 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:16:08,662 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 [2022-07-22 11:16:08,663 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 148 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:08,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 11:16:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:16:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 208. [2022-07-22 11:16:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.5748792270531402) internal successors, (326), 207 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 326 transitions. [2022-07-22 11:16:08,673 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 326 transitions. Word has length 52 [2022-07-22 11:16:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:08,673 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 326 transitions. [2022-07-22 11:16:08,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 326 transitions. [2022-07-22 11:16:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:16:08,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:08,675 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] [2022-07-22 11:16:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:16:08,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 40885771, now seen corresponding path program 1 times [2022-07-22 11:16:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726580344] [2022-07-22 11:16:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:08,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726580344] [2022-07-22 11:16:08,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726580344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:08,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:08,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775525743] [2022-07-22 11:16:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:08,775 INFO L87 Difference]: Start difference. First operand 208 states and 326 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:09,492 INFO L93 Difference]: Finished difference Result 411 states and 641 transitions. [2022-07-22 11:16:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 11:16:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:09,493 INFO L225 Difference]: With dead ends: 411 [2022-07-22 11:16:09,493 INFO L226 Difference]: Without dead ends: 224 [2022-07-22 11:16:09,494 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 [2022-07-22 11:16:09,495 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:09,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:16:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-22 11:16:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 208. [2022-07-22 11:16:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.570048309178744) internal successors, (325), 207 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 325 transitions. [2022-07-22 11:16:09,502 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 325 transitions. Word has length 52 [2022-07-22 11:16:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:09,502 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 325 transitions. [2022-07-22 11:16:09,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 325 transitions. [2022-07-22 11:16:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:16:09,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:09,505 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] [2022-07-22 11:16:09,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:16:09,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash 861050644, now seen corresponding path program 1 times [2022-07-22 11:16:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278812748] [2022-07-22 11:16:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278812748] [2022-07-22 11:16:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278812748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:09,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:09,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:09,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542163674] [2022-07-22 11:16:09,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:09,627 INFO L87 Difference]: Start difference. First operand 208 states and 325 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:10,237 INFO L93 Difference]: Finished difference Result 410 states and 639 transitions. [2022-07-22 11:16:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:10,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 11:16:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:10,239 INFO L225 Difference]: With dead ends: 410 [2022-07-22 11:16:10,240 INFO L226 Difference]: Without dead ends: 223 [2022-07-22 11:16:10,240 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 [2022-07-22 11:16:10,241 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 19 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:10,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 475 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:16:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-22 11:16:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 208. [2022-07-22 11:16:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.565217391304348) internal successors, (324), 207 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 324 transitions. [2022-07-22 11:16:10,248 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 324 transitions. Word has length 52 [2022-07-22 11:16:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:10,249 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 324 transitions. [2022-07-22 11:16:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 324 transitions. [2022-07-22 11:16:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:16:10,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:10,251 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] [2022-07-22 11:16:10,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:16:10,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1296410196, now seen corresponding path program 1 times [2022-07-22 11:16:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:10,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110536158] [2022-07-22 11:16:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:10,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:10,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110536158] [2022-07-22 11:16:10,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110536158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:10,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:10,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679345727] [2022-07-22 11:16:10,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:10,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:10,346 INFO L87 Difference]: Start difference. First operand 208 states and 324 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:12,784 INFO L93 Difference]: Finished difference Result 495 states and 773 transitions. [2022-07-22 11:16:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 11:16:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:12,787 INFO L225 Difference]: With dead ends: 495 [2022-07-22 11:16:12,787 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:16:12,787 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 [2022-07-22 11:16:12,788 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 141 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:12,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:16:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 209. [2022-07-22 11:16:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.5528846153846154) internal successors, (323), 208 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 323 transitions. [2022-07-22 11:16:12,795 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 323 transitions. Word has length 52 [2022-07-22 11:16:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:12,796 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 323 transitions. [2022-07-22 11:16:12,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 323 transitions. [2022-07-22 11:16:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:16:12,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:12,797 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] [2022-07-22 11:16:12,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:16:12,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:12,798 INFO L85 PathProgramCache]: Analyzing trace with hash 585554567, now seen corresponding path program 1 times [2022-07-22 11:16:12,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:12,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473489590] [2022-07-22 11:16:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:12,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473489590] [2022-07-22 11:16:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473489590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:12,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:12,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861582725] [2022-07-22 11:16:12,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:12,937 INFO L87 Difference]: Start difference. First operand 209 states and 323 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:14,958 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 [] [2022-07-22 11:16:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:15,174 INFO L93 Difference]: Finished difference Result 410 states and 635 transitions. [2022-07-22 11:16:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-07-22 11:16:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:15,176 INFO L225 Difference]: With dead ends: 410 [2022-07-22 11:16:15,176 INFO L226 Difference]: Without dead ends: 222 [2022-07-22 11:16:15,176 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 [2022-07-22 11:16:15,177 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 22 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:15,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-22 11:16:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 209. [2022-07-22 11:16:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.5480769230769231) internal successors, (322), 208 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 322 transitions. [2022-07-22 11:16:15,183 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 322 transitions. Word has length 53 [2022-07-22 11:16:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:15,184 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 322 transitions. [2022-07-22 11:16:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 322 transitions. [2022-07-22 11:16:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:16:15,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:15,185 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] [2022-07-22 11:16:15,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:16:15,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash -991616538, now seen corresponding path program 1 times [2022-07-22 11:16:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470276348] [2022-07-22 11:16:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470276348] [2022-07-22 11:16:15,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470276348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:15,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:15,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:15,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354203401] [2022-07-22 11:16:15,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:15,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:15,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:15,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:15,278 INFO L87 Difference]: Start difference. First operand 209 states and 322 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:16,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:17,308 INFO L93 Difference]: Finished difference Result 496 states and 769 transitions. [2022-07-22 11:16:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-22 11:16:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:17,311 INFO L225 Difference]: With dead ends: 496 [2022-07-22 11:16:17,311 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:16:17,311 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 [2022-07-22 11:16:17,312 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:17,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:16:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:16:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 209. [2022-07-22 11:16:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 208 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 318 transitions. [2022-07-22 11:16:17,317 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 318 transitions. Word has length 54 [2022-07-22 11:16:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:17,318 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 318 transitions. [2022-07-22 11:16:17,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 318 transitions. [2022-07-22 11:16:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 11:16:17,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:17,319 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] [2022-07-22 11:16:17,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:16:17,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash 373652162, now seen corresponding path program 1 times [2022-07-22 11:16:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891706333] [2022-07-22 11:16:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891706333] [2022-07-22 11:16:17,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891706333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:17,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:17,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454819281] [2022-07-22 11:16:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:17,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:17,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:17,436 INFO L87 Difference]: Start difference. First operand 209 states and 318 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:17,816 INFO L93 Difference]: Finished difference Result 400 states and 614 transitions. [2022-07-22 11:16:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-22 11:16:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:17,818 INFO L225 Difference]: With dead ends: 400 [2022-07-22 11:16:17,818 INFO L226 Difference]: Without dead ends: 212 [2022-07-22 11:16:17,818 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 [2022-07-22 11:16:17,819 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:17,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:16:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-22 11:16:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2022-07-22 11:16:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.5240384615384615) internal successors, (317), 208 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 317 transitions. [2022-07-22 11:16:17,824 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 317 transitions. Word has length 55 [2022-07-22 11:16:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 317 transitions. [2022-07-22 11:16:17,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 317 transitions. [2022-07-22 11:16:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 11:16:17,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:17,825 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] [2022-07-22 11:16:17,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:16:17,826 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1312076378, now seen corresponding path program 1 times [2022-07-22 11:16:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269247283] [2022-07-22 11:16:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269247283] [2022-07-22 11:16:17,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269247283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:17,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:17,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:17,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728917613] [2022-07-22 11:16:17,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:17,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:17,920 INFO L87 Difference]: Start difference. First operand 209 states and 317 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:18,779 INFO L93 Difference]: Finished difference Result 437 states and 668 transitions. [2022-07-22 11:16:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-22 11:16:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:18,781 INFO L225 Difference]: With dead ends: 437 [2022-07-22 11:16:18,781 INFO L226 Difference]: Without dead ends: 249 [2022-07-22 11:16:18,781 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 [2022-07-22 11:16:18,782 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 30 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:18,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:16:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-22 11:16:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 231. [2022-07-22 11:16:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.5260869565217392) internal successors, (351), 230 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 351 transitions. [2022-07-22 11:16:18,788 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 351 transitions. Word has length 55 [2022-07-22 11:16:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:18,789 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 351 transitions. [2022-07-22 11:16:18,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 351 transitions. [2022-07-22 11:16:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 11:16:18,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:18,790 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] [2022-07-22 11:16:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:16:18,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1411411051, now seen corresponding path program 1 times [2022-07-22 11:16:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:18,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421983654] [2022-07-22 11:16:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:18,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421983654] [2022-07-22 11:16:18,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421983654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:18,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:18,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:18,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18175153] [2022-07-22 11:16:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:18,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:18,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:18,879 INFO L87 Difference]: Start difference. First operand 231 states and 351 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:20,200 INFO L93 Difference]: Finished difference Result 540 states and 829 transitions. [2022-07-22 11:16:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 11:16:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:20,202 INFO L225 Difference]: With dead ends: 540 [2022-07-22 11:16:20,202 INFO L226 Difference]: Without dead ends: 330 [2022-07-22 11:16:20,203 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 [2022-07-22 11:16:20,203 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:20,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:16:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-22 11:16:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 231. [2022-07-22 11:16:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.508695652173913) internal successors, (347), 230 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 347 transitions. [2022-07-22 11:16:20,210 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 347 transitions. Word has length 69 [2022-07-22 11:16:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:20,210 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 347 transitions. [2022-07-22 11:16:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 347 transitions. [2022-07-22 11:16:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 11:16:20,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:20,212 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] [2022-07-22 11:16:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:16:20,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2063391372, now seen corresponding path program 1 times [2022-07-22 11:16:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:20,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2501322] [2022-07-22 11:16:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:20,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:20,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2501322] [2022-07-22 11:16:20,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2501322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:20,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:20,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:20,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871416033] [2022-07-22 11:16:20,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:20,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:20,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:20,301 INFO L87 Difference]: Start difference. First operand 231 states and 347 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:21,277 INFO L93 Difference]: Finished difference Result 539 states and 820 transitions. [2022-07-22 11:16:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 11:16:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:21,279 INFO L225 Difference]: With dead ends: 539 [2022-07-22 11:16:21,279 INFO L226 Difference]: Without dead ends: 329 [2022-07-22 11:16:21,280 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 [2022-07-22 11:16:21,280 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 138 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:21,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 334 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:16:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-22 11:16:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 232. [2022-07-22 11:16:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.4978354978354977) internal successors, (346), 231 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 346 transitions. [2022-07-22 11:16:21,287 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 346 transitions. Word has length 69 [2022-07-22 11:16:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:21,288 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 346 transitions. [2022-07-22 11:16:21,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 346 transitions. [2022-07-22 11:16:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 11:16:21,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:21,289 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] [2022-07-22 11:16:21,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:16:21,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash 122165287, now seen corresponding path program 1 times [2022-07-22 11:16:21,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:21,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529937809] [2022-07-22 11:16:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:21,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:21,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:21,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529937809] [2022-07-22 11:16:21,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529937809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:21,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:21,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587600723] [2022-07-22 11:16:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:21,398 INFO L87 Difference]: Start difference. First operand 232 states and 346 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:22,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:22,895 INFO L93 Difference]: Finished difference Result 540 states and 816 transitions. [2022-07-22 11:16:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:22,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-07-22 11:16:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:22,897 INFO L225 Difference]: With dead ends: 540 [2022-07-22 11:16:22,897 INFO L226 Difference]: Without dead ends: 329 [2022-07-22 11:16:22,898 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 [2022-07-22 11:16:22,898 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 142 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:22,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 334 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:16:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-22 11:16:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 232. [2022-07-22 11:16:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.4805194805194806) internal successors, (342), 231 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 342 transitions. [2022-07-22 11:16:22,905 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 342 transitions. Word has length 70 [2022-07-22 11:16:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:22,906 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 342 transitions. [2022-07-22 11:16:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 342 transitions. [2022-07-22 11:16:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 11:16:22,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:22,907 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] [2022-07-22 11:16:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:16:22,907 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1733152866, now seen corresponding path program 1 times [2022-07-22 11:16:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:22,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647455706] [2022-07-22 11:16:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:16:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647455706] [2022-07-22 11:16:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647455706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:22,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:22,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306493273] [2022-07-22 11:16:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:22,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:22,996 INFO L87 Difference]: Start difference. First operand 232 states and 342 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:24,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:24,910 INFO L93 Difference]: Finished difference Result 450 states and 669 transitions. [2022-07-22 11:16:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-22 11:16:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:24,912 INFO L225 Difference]: With dead ends: 450 [2022-07-22 11:16:24,912 INFO L226 Difference]: Without dead ends: 239 [2022-07-22 11:16:24,913 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 [2022-07-22 11:16:24,913 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:24,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 513 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:16:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-22 11:16:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2022-07-22 11:16:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.4761904761904763) internal successors, (341), 231 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 341 transitions. [2022-07-22 11:16:24,918 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 341 transitions. Word has length 72 [2022-07-22 11:16:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:24,919 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 341 transitions. [2022-07-22 11:16:24,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 341 transitions. [2022-07-22 11:16:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 11:16:24,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:24,920 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] [2022-07-22 11:16:24,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:16:24,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash 293504549, now seen corresponding path program 1 times [2022-07-22 11:16:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930747833] [2022-07-22 11:16:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:25,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930747833] [2022-07-22 11:16:25,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930747833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:25,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:25,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628444530] [2022-07-22 11:16:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:25,031 INFO L87 Difference]: Start difference. First operand 232 states and 341 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:26,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:27,031 INFO L93 Difference]: Finished difference Result 536 states and 793 transitions. [2022-07-22 11:16:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-07-22 11:16:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:27,034 INFO L225 Difference]: With dead ends: 536 [2022-07-22 11:16:27,034 INFO L226 Difference]: Without dead ends: 325 [2022-07-22 11:16:27,034 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 [2022-07-22 11:16:27,035 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 84 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:27,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 471 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:16:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-22 11:16:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 263. [2022-07-22 11:16:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.4770992366412214) internal successors, (387), 262 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) [2022-07-22 11:16:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 387 transitions. [2022-07-22 11:16:27,042 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 387 transitions. Word has length 77 [2022-07-22 11:16:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:27,042 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 387 transitions. [2022-07-22 11:16:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 387 transitions. [2022-07-22 11:16:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 11:16:27,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:27,044 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] [2022-07-22 11:16:27,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:16:27,044 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1950478749, now seen corresponding path program 1 times [2022-07-22 11:16:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136552028] [2022-07-22 11:16:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:27,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136552028] [2022-07-22 11:16:27,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136552028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:27,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:27,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083805033] [2022-07-22 11:16:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:27,139 INFO L87 Difference]: Start difference. First operand 263 states and 387 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:29,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:29,311 INFO L93 Difference]: Finished difference Result 551 states and 815 transitions. [2022-07-22 11:16:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-07-22 11:16:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:29,314 INFO L225 Difference]: With dead ends: 551 [2022-07-22 11:16:29,314 INFO L226 Difference]: Without dead ends: 309 [2022-07-22 11:16:29,315 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 [2022-07-22 11:16:29,315 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 35 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:29,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 589 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:16:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-07-22 11:16:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 287. [2022-07-22 11:16:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4755244755244756) internal successors, (422), 286 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 422 transitions. [2022-07-22 11:16:29,322 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 422 transitions. Word has length 77 [2022-07-22 11:16:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:29,323 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 422 transitions. [2022-07-22 11:16:29,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 422 transitions. [2022-07-22 11:16:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 11:16:29,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:29,324 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] [2022-07-22 11:16:29,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:16:29,325 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2009733770, now seen corresponding path program 1 times [2022-07-22 11:16:29,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356647297] [2022-07-22 11:16:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356647297] [2022-07-22 11:16:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356647297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:29,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:29,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901125999] [2022-07-22 11:16:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:29,441 INFO L87 Difference]: Start difference. First operand 287 states and 422 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:30,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:30,812 INFO L93 Difference]: Finished difference Result 615 states and 908 transitions. [2022-07-22 11:16:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-22 11:16:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:30,814 INFO L225 Difference]: With dead ends: 615 [2022-07-22 11:16:30,815 INFO L226 Difference]: Without dead ends: 349 [2022-07-22 11:16:30,815 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 [2022-07-22 11:16:30,816 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 73 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:30,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 469 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:16:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-22 11:16:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 297. [2022-07-22 11:16:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.489864864864865) internal successors, (441), 296 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 441 transitions. [2022-07-22 11:16:30,823 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 441 transitions. Word has length 82 [2022-07-22 11:16:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:30,823 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 441 transitions. [2022-07-22 11:16:30,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 441 transitions. [2022-07-22 11:16:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 11:16:30,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:30,825 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] [2022-07-22 11:16:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:16:30,825 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2129799745, now seen corresponding path program 1 times [2022-07-22 11:16:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139190225] [2022-07-22 11:16:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139190225] [2022-07-22 11:16:30,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139190225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:30,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:30,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:30,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468079336] [2022-07-22 11:16:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:30,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:30,920 INFO L87 Difference]: Start difference. First operand 297 states and 441 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) [2022-07-22 11:16:32,927 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 [] [2022-07-22 11:16:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:33,216 INFO L93 Difference]: Finished difference Result 619 states and 919 transitions. [2022-07-22 11:16:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:33,217 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 [2022-07-22 11:16:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:33,218 INFO L225 Difference]: With dead ends: 619 [2022-07-22 11:16:33,219 INFO L226 Difference]: Without dead ends: 343 [2022-07-22 11:16:33,219 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 [2022-07-22 11:16:33,220 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 66 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 475 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-22 11:16:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 298. [2022-07-22 11:16:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4882154882154883) internal successors, (442), 297 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 442 transitions. [2022-07-22 11:16:33,227 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 442 transitions. Word has length 83 [2022-07-22 11:16:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:33,227 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 442 transitions. [2022-07-22 11:16:33,227 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) [2022-07-22 11:16:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 442 transitions. [2022-07-22 11:16:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 11:16:33,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:33,229 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 11:16:33,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:16:33,229 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1674400777, now seen corresponding path program 1 times [2022-07-22 11:16:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032735150] [2022-07-22 11:16:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:33,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:16:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032735150] [2022-07-22 11:16:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032735150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:33,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:33,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:16:33,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105641870] [2022-07-22 11:16:33,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:33,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:16:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:33,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:16:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:33,352 INFO L87 Difference]: Start difference. First operand 298 states and 442 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:35,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:36,062 INFO L93 Difference]: Finished difference Result 585 states and 872 transitions. [2022-07-22 11:16:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:16:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-22 11:16:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:36,064 INFO L225 Difference]: With dead ends: 585 [2022-07-22 11:16:36,064 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:16:36,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:16:36,065 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 145 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:36,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 358 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 11:16:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:16:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-07-22 11:16:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4803921568627452) internal successors, (453), 306 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 453 transitions. [2022-07-22 11:16:36,074 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 453 transitions. Word has length 94 [2022-07-22 11:16:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:36,074 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 453 transitions. [2022-07-22 11:16:36,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 453 transitions. [2022-07-22 11:16:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 11:16:36,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:36,077 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-07-22 11:16:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:16:36,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1278038072, now seen corresponding path program 1 times [2022-07-22 11:16:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:36,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220159917] [2022-07-22 11:16:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:36,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220159917] [2022-07-22 11:16:36,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220159917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:36,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:36,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:36,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989865431] [2022-07-22 11:16:36,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:36,184 INFO L87 Difference]: Start difference. First operand 307 states and 453 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:36,934 INFO L93 Difference]: Finished difference Result 680 states and 1017 transitions. [2022-07-22 11:16:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 95 [2022-07-22 11:16:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:36,936 INFO L225 Difference]: With dead ends: 680 [2022-07-22 11:16:36,936 INFO L226 Difference]: Without dead ends: 394 [2022-07-22 11:16:36,937 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 [2022-07-22 11:16:36,938 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 132 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:36,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 354 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:16:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-22 11:16:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 307. [2022-07-22 11:16:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4640522875816993) internal successors, (448), 306 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 448 transitions. [2022-07-22 11:16:36,967 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 448 transitions. Word has length 95 [2022-07-22 11:16:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:36,967 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 448 transitions. [2022-07-22 11:16:36,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 448 transitions. [2022-07-22 11:16:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:16:36,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:36,969 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:16:36,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:16:36,969 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash 868200130, now seen corresponding path program 1 times [2022-07-22 11:16:36,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:36,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798619611] [2022-07-22 11:16:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:37,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798619611] [2022-07-22 11:16:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798619611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:37,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979326850] [2022-07-22 11:16:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:37,081 INFO L87 Difference]: Start difference. First operand 307 states and 448 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:38,382 INFO L93 Difference]: Finished difference Result 628 states and 918 transitions. [2022-07-22 11:16:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 99 [2022-07-22 11:16:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:38,384 INFO L225 Difference]: With dead ends: 628 [2022-07-22 11:16:38,384 INFO L226 Difference]: Without dead ends: 342 [2022-07-22 11:16:38,385 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 [2022-07-22 11:16:38,385 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 73 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:38,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 503 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:16:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-22 11:16:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 307. [2022-07-22 11:16:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4607843137254901) internal successors, (447), 306 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 447 transitions. [2022-07-22 11:16:38,394 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 447 transitions. Word has length 99 [2022-07-22 11:16:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:38,394 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 447 transitions. [2022-07-22 11:16:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 447 transitions. [2022-07-22 11:16:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:16:38,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:38,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:16:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:16:38,396 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 908874880, now seen corresponding path program 1 times [2022-07-22 11:16:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725062837] [2022-07-22 11:16:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:16:38,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:38,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725062837] [2022-07-22 11:16:38,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725062837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:38,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:38,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765797624] [2022-07-22 11:16:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:38,492 INFO L87 Difference]: Start difference. First operand 307 states and 447 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:38,531 INFO L93 Difference]: Finished difference Result 872 states and 1283 transitions. [2022-07-22 11:16:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:38,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-22 11:16:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:38,554 INFO L225 Difference]: With dead ends: 872 [2022-07-22 11:16:38,554 INFO L226 Difference]: Without dead ends: 586 [2022-07-22 11:16:38,555 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 [2022-07-22 11:16:38,555 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 141 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:38,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 426 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-22 11:16:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-07-22 11:16:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.458119658119658) internal successors, (853), 585 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 853 transitions. [2022-07-22 11:16:38,568 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 853 transitions. Word has length 99 [2022-07-22 11:16:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 853 transitions. [2022-07-22 11:16:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 853 transitions. [2022-07-22 11:16:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:16:38,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:38,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:16:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:16:38,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1342603966, now seen corresponding path program 1 times [2022-07-22 11:16:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973283355] [2022-07-22 11:16:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:16:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973283355] [2022-07-22 11:16:38,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973283355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:38,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:38,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:38,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583458195] [2022-07-22 11:16:38,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:38,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:38,652 INFO L87 Difference]: Start difference. First operand 586 states and 853 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:38,686 INFO L93 Difference]: Finished difference Result 1178 states and 1718 transitions. [2022-07-22 11:16:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-22 11:16:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:38,689 INFO L225 Difference]: With dead ends: 1178 [2022-07-22 11:16:38,689 INFO L226 Difference]: Without dead ends: 613 [2022-07-22 11:16:38,690 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 [2022-07-22 11:16:38,690 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:38,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-07-22 11:16:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2022-07-22 11:16:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.4509803921568627) internal successors, (888), 612 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 888 transitions. [2022-07-22 11:16:38,704 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 888 transitions. Word has length 99 [2022-07-22 11:16:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 888 transitions. [2022-07-22 11:16:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 888 transitions. [2022-07-22 11:16:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:16:38,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:38,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:16:38,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:16:38,707 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2113329668, now seen corresponding path program 1 times [2022-07-22 11:16:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186433743] [2022-07-22 11:16:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:38,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 11:16:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186433743] [2022-07-22 11:16:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186433743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:38,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:38,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634071236] [2022-07-22 11:16:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:38,785 INFO L87 Difference]: Start difference. First operand 613 states and 888 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:38,811 INFO L93 Difference]: Finished difference Result 1207 states and 1754 transitions. [2022-07-22 11:16:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-22 11:16:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:38,813 INFO L225 Difference]: With dead ends: 1207 [2022-07-22 11:16:38,813 INFO L226 Difference]: Without dead ends: 615 [2022-07-22 11:16:38,814 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 [2022-07-22 11:16:38,815 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:38,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-07-22 11:16:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2022-07-22 11:16:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.4495114006514658) internal successors, (890), 614 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 890 transitions. [2022-07-22 11:16:38,829 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 890 transitions. Word has length 99 [2022-07-22 11:16:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:38,829 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 890 transitions. [2022-07-22 11:16:38,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 890 transitions. [2022-07-22 11:16:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 11:16:38,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:38,831 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:16:38,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:16:38,831 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash -254845290, now seen corresponding path program 1 times [2022-07-22 11:16:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635376637] [2022-07-22 11:16:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:16:38,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635376637] [2022-07-22 11:16:38,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635376637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:38,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:38,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759898934] [2022-07-22 11:16:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:38,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:38,960 INFO L87 Difference]: Start difference. First operand 615 states and 890 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2022-07-22 11:16:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:39,007 INFO L93 Difference]: Finished difference Result 1493 states and 2175 transitions. [2022-07-22 11:16:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 101 [2022-07-22 11:16:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:39,010 INFO L225 Difference]: With dead ends: 1493 [2022-07-22 11:16:39,011 INFO L226 Difference]: Without dead ends: 901 [2022-07-22 11:16:39,012 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 [2022-07-22 11:16:39,012 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:39,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 372 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-07-22 11:16:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 899. [2022-07-22 11:16:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.457683741648107) internal successors, (1309), 898 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1309 transitions. [2022-07-22 11:16:39,034 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1309 transitions. Word has length 101 [2022-07-22 11:16:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:39,034 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1309 transitions. [2022-07-22 11:16:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2022-07-22 11:16:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1309 transitions. [2022-07-22 11:16:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 11:16:39,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:39,036 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 11:16:39,036 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 34857145, now seen corresponding path program 1 times [2022-07-22 11:16:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700841091] [2022-07-22 11:16:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:16:39,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:39,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700841091] [2022-07-22 11:16:39,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700841091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:39,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600278868] [2022-07-22 11:16:39,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:39,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:39,133 INFO L87 Difference]: Start difference. First operand 899 states and 1309 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:39,205 INFO L93 Difference]: Finished difference Result 2061 states and 3011 transitions. [2022-07-22 11:16:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-22 11:16:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:39,210 INFO L225 Difference]: With dead ends: 2061 [2022-07-22 11:16:39,210 INFO L226 Difference]: Without dead ends: 1185 [2022-07-22 11:16:39,212 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 [2022-07-22 11:16:39,212 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:39,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-22 11:16:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1183. [2022-07-22 11:16:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.4500846023688663) internal successors, (1714), 1182 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1714 transitions. [2022-07-22 11:16:39,244 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1714 transitions. Word has length 106 [2022-07-22 11:16:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:39,244 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1714 transitions. [2022-07-22 11:16:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1714 transitions. [2022-07-22 11:16:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 11:16:39,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:39,247 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] [2022-07-22 11:16:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 11:16:39,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1774249839, now seen corresponding path program 1 times [2022-07-22 11:16:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:39,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906793120] [2022-07-22 11:16:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:16:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:39,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906793120] [2022-07-22 11:16:39,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906793120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:39,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:39,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684893517] [2022-07-22 11:16:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:39,355 INFO L87 Difference]: Start difference. First operand 1183 states and 1714 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:39,418 INFO L93 Difference]: Finished difference Result 2624 states and 3816 transitions. [2022-07-22 11:16:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-22 11:16:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:39,423 INFO L225 Difference]: With dead ends: 2624 [2022-07-22 11:16:39,423 INFO L226 Difference]: Without dead ends: 1464 [2022-07-22 11:16:39,425 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 [2022-07-22 11:16:39,426 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:39,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 567 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-07-22 11:16:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2022-07-22 11:16:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 1.4497607655502391) internal successors, (2121), 1463 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2121 transitions. [2022-07-22 11:16:39,462 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2121 transitions. Word has length 123 [2022-07-22 11:16:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:39,462 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2121 transitions. [2022-07-22 11:16:39,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2121 transitions. [2022-07-22 11:16:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 11:16:39,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:39,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:39,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:16:39,465 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1271906027, now seen corresponding path program 1 times [2022-07-22 11:16:39,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:39,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263278841] [2022-07-22 11:16:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 11:16:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263278841] [2022-07-22 11:16:39,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263278841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:39,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:39,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:39,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245610255] [2022-07-22 11:16:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:39,621 INFO L87 Difference]: Start difference. First operand 1464 states and 2121 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:39,673 INFO L93 Difference]: Finished difference Result 1752 states and 2537 transitions. [2022-07-22 11:16:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 129 [2022-07-22 11:16:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:39,679 INFO L225 Difference]: With dead ends: 1752 [2022-07-22 11:16:39,679 INFO L226 Difference]: Without dead ends: 1750 [2022-07-22 11:16:39,680 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 [2022-07-22 11:16:39,684 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:39,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-07-22 11:16:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1748. [2022-07-22 11:16:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 1.450486548368632) internal successors, (2534), 1747 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2534 transitions. [2022-07-22 11:16:39,743 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2534 transitions. Word has length 129 [2022-07-22 11:16:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:39,744 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2534 transitions. [2022-07-22 11:16:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2534 transitions. [2022-07-22 11:16:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 11:16:39,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:39,748 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] [2022-07-22 11:16:39,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:16:39,749 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1035961974, now seen corresponding path program 1 times [2022-07-22 11:16:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925715395] [2022-07-22 11:16:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 11:16:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925715395] [2022-07-22 11:16:39,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925715395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:39,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:39,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918351902] [2022-07-22 11:16:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:39,894 INFO L87 Difference]: Start difference. First operand 1748 states and 2534 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2022-07-22 11:16:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:39,964 INFO L93 Difference]: Finished difference Result 3754 states and 5457 transitions. [2022-07-22 11:16:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 166 [2022-07-22 11:16:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:39,971 INFO L225 Difference]: With dead ends: 3754 [2022-07-22 11:16:39,971 INFO L226 Difference]: Without dead ends: 2029 [2022-07-22 11:16:39,974 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 [2022-07-22 11:16:39,974 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:39,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 571 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2022-07-22 11:16:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2022-07-22 11:16:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 1.45069033530572) internal successors, (2942), 2028 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2942 transitions. [2022-07-22 11:16:40,026 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2942 transitions. Word has length 166 [2022-07-22 11:16:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:40,027 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 2942 transitions. [2022-07-22 11:16:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2022-07-22 11:16:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2942 transitions. [2022-07-22 11:16:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-22 11:16:40,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:40,031 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:40,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 11:16:40,032 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -182233907, now seen corresponding path program 1 times [2022-07-22 11:16:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41747870] [2022-07-22 11:16:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 11:16:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41747870] [2022-07-22 11:16:40,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41747870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:40,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:40,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:40,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463652106] [2022-07-22 11:16:40,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:40,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:40,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:40,194 INFO L87 Difference]: Start difference. First operand 2029 states and 2942 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,200 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 [] [2022-07-22 11:16:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:42,582 INFO L93 Difference]: Finished difference Result 4631 states and 6763 transitions. [2022-07-22 11:16:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 173 [2022-07-22 11:16:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:42,592 INFO L225 Difference]: With dead ends: 4631 [2022-07-22 11:16:42,592 INFO L226 Difference]: Without dead ends: 2625 [2022-07-22 11:16:42,596 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 [2022-07-22 11:16:42,596 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 105 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:42,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 514 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2022-07-22 11:16:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2190. [2022-07-22 11:16:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.4878940155322065) internal successors, (3257), 2189 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3257 transitions. [2022-07-22 11:16:42,683 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3257 transitions. Word has length 173 [2022-07-22 11:16:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3257 transitions. [2022-07-22 11:16:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3257 transitions. [2022-07-22 11:16:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 11:16:42,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:42,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:16:42,690 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash -119444082, now seen corresponding path program 1 times [2022-07-22 11:16:42,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:42,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036860907] [2022-07-22 11:16:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-22 11:16:42,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:42,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036860907] [2022-07-22 11:16:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036860907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:42,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:42,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049131322] [2022-07-22 11:16:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:42,817 INFO L87 Difference]: Start difference. First operand 2190 states and 3257 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:43,816 INFO L93 Difference]: Finished difference Result 4511 states and 6700 transitions. [2022-07-22 11:16:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:43,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 174 [2022-07-22 11:16:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:43,825 INFO L225 Difference]: With dead ends: 4511 [2022-07-22 11:16:43,825 INFO L226 Difference]: Without dead ends: 2344 [2022-07-22 11:16:43,828 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 [2022-07-22 11:16:43,828 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 41 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:43,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 590 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 11:16:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-07-22 11:16:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2190. [2022-07-22 11:16:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.4846962083142987) internal successors, (3250), 2189 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3250 transitions. [2022-07-22 11:16:43,909 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3250 transitions. Word has length 174 [2022-07-22 11:16:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:43,910 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3250 transitions. [2022-07-22 11:16:43,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3250 transitions. [2022-07-22 11:16:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-22 11:16:43,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:43,914 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:43,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:16:43,915 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash -894854300, now seen corresponding path program 1 times [2022-07-22 11:16:43,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112792547] [2022-07-22 11:16:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 11:16:44,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:44,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112792547] [2022-07-22 11:16:44,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112792547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:44,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:44,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582467816] [2022-07-22 11:16:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:44,047 INFO L87 Difference]: Start difference. First operand 2190 states and 3250 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:45,352 INFO L93 Difference]: Finished difference Result 4799 states and 7071 transitions. [2022-07-22 11:16:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 195 [2022-07-22 11:16:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:45,362 INFO L225 Difference]: With dead ends: 4799 [2022-07-22 11:16:45,362 INFO L226 Difference]: Without dead ends: 2632 [2022-07-22 11:16:45,365 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 [2022-07-22 11:16:45,366 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 124 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:45,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 401 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:16:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-22 11:16:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2190. [2022-07-22 11:16:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.471904979442668) internal successors, (3222), 2189 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3222 transitions. [2022-07-22 11:16:45,424 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3222 transitions. Word has length 195 [2022-07-22 11:16:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:45,425 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3222 transitions. [2022-07-22 11:16:45,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3222 transitions. [2022-07-22 11:16:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-22 11:16:45,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:45,429 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 11:16:45,430 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1425392042, now seen corresponding path program 1 times [2022-07-22 11:16:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364963812] [2022-07-22 11:16:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 11:16:45,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:45,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364963812] [2022-07-22 11:16:45,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364963812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:45,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:45,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455423612] [2022-07-22 11:16:45,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:45,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:45,569 INFO L87 Difference]: Start difference. First operand 2190 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:46,156 INFO L93 Difference]: Finished difference Result 4483 states and 6594 transitions. [2022-07-22 11:16:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 196 [2022-07-22 11:16:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:46,165 INFO L225 Difference]: With dead ends: 4483 [2022-07-22 11:16:46,165 INFO L226 Difference]: Without dead ends: 2316 [2022-07-22 11:16:46,168 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 [2022-07-22 11:16:46,168 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 40 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:46,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 581 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:16:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-07-22 11:16:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2190. [2022-07-22 11:16:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.4687071722247602) internal successors, (3215), 2189 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3215 transitions. [2022-07-22 11:16:46,221 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3215 transitions. Word has length 196 [2022-07-22 11:16:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:46,222 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3215 transitions. [2022-07-22 11:16:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3215 transitions. [2022-07-22 11:16:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-22 11:16:46,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:46,226 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:46,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-22 11:16:46,227 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2021430741, now seen corresponding path program 1 times [2022-07-22 11:16:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:46,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945332203] [2022-07-22 11:16:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 11:16:46,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:46,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945332203] [2022-07-22 11:16:46,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945332203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:46,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:46,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:46,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237636094] [2022-07-22 11:16:46,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:46,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:46,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:46,373 INFO L87 Difference]: Start difference. First operand 2190 states and 3215 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:47,409 INFO L93 Difference]: Finished difference Result 4483 states and 6580 transitions. [2022-07-22 11:16:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 196 [2022-07-22 11:16:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:47,415 INFO L225 Difference]: With dead ends: 4483 [2022-07-22 11:16:47,415 INFO L226 Difference]: Without dead ends: 2316 [2022-07-22 11:16:47,417 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 [2022-07-22 11:16:47,418 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 38 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:47,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 579 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:16:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-07-22 11:16:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2190. [2022-07-22 11:16:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.4655093650068525) internal successors, (3208), 2189 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3208 transitions. [2022-07-22 11:16:47,478 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3208 transitions. Word has length 196 [2022-07-22 11:16:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:47,479 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3208 transitions. [2022-07-22 11:16:47,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3208 transitions. [2022-07-22 11:16:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 11:16:47,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:47,484 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 11:16:47,484 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -19154939, now seen corresponding path program 1 times [2022-07-22 11:16:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820430811] [2022-07-22 11:16:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 11:16:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:47,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820430811] [2022-07-22 11:16:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820430811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:47,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:47,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61805136] [2022-07-22 11:16:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:47,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:47,636 INFO L87 Difference]: Start difference. First operand 2190 states and 3208 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:48,364 INFO L93 Difference]: Finished difference Result 4799 states and 6987 transitions. [2022-07-22 11:16:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:48,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 197 [2022-07-22 11:16:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:48,370 INFO L225 Difference]: With dead ends: 4799 [2022-07-22 11:16:48,370 INFO L226 Difference]: Without dead ends: 2632 [2022-07-22 11:16:48,373 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 [2022-07-22 11:16:48,374 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 121 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:48,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 354 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:16:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-22 11:16:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2190. [2022-07-22 11:16:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 1.4559159433531292) internal successors, (3187), 2189 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3187 transitions. [2022-07-22 11:16:48,443 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3187 transitions. Word has length 197 [2022-07-22 11:16:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:48,443 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3187 transitions. [2022-07-22 11:16:48,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3187 transitions. [2022-07-22 11:16:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-22 11:16:48,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:48,448 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 11:16:48,449 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1110169220, now seen corresponding path program 1 times [2022-07-22 11:16:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:48,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713235457] [2022-07-22 11:16:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-22 11:16:48,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713235457] [2022-07-22 11:16:48,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713235457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:48,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:48,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247313564] [2022-07-22 11:16:48,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:48,607 INFO L87 Difference]: Start difference. First operand 2190 states and 3187 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) [2022-07-22 11:16:49,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:50,236 INFO L93 Difference]: Finished difference Result 4799 states and 6945 transitions. [2022-07-22 11:16:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:50,237 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 199 [2022-07-22 11:16:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:50,241 INFO L225 Difference]: With dead ends: 4799 [2022-07-22 11:16:50,241 INFO L226 Difference]: Without dead ends: 2632 [2022-07-22 11:16:50,245 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 [2022-07-22 11:16:50,246 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 103 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:50,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 354 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:16:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-22 11:16:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2204. [2022-07-22 11:16:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.4561960962324103) internal successors, (3208), 2203 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 3208 transitions. [2022-07-22 11:16:50,308 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 3208 transitions. Word has length 199 [2022-07-22 11:16:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:50,308 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 3208 transitions. [2022-07-22 11:16:50,308 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) [2022-07-22 11:16:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 3208 transitions. [2022-07-22 11:16:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-22 11:16:50,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:50,314 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:50,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 11:16:50,314 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1457051736, now seen corresponding path program 1 times [2022-07-22 11:16:50,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:50,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486649997] [2022-07-22 11:16:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:50,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 11:16:50,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486649997] [2022-07-22 11:16:50,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486649997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:50,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:50,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:50,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769665545] [2022-07-22 11:16:50,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:50,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:50,455 INFO L87 Difference]: Start difference. First operand 2204 states and 3208 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:51,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:52,156 INFO L93 Difference]: Finished difference Result 5107 states and 7421 transitions. [2022-07-22 11:16:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 212 [2022-07-22 11:16:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:52,161 INFO L225 Difference]: With dead ends: 5107 [2022-07-22 11:16:52,161 INFO L226 Difference]: Without dead ends: 2926 [2022-07-22 11:16:52,165 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 [2022-07-22 11:16:52,165 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 117 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:52,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 391 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:16:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-07-22 11:16:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2337. [2022-07-22 11:16:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 1.4327910958904109) internal successors, (3347), 2336 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3347 transitions. [2022-07-22 11:16:52,236 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3347 transitions. Word has length 212 [2022-07-22 11:16:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:52,236 INFO L495 AbstractCegarLoop]: Abstraction has 2337 states and 3347 transitions. [2022-07-22 11:16:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3347 transitions. [2022-07-22 11:16:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-22 11:16:52,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:52,240 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:52,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 11:16:52,241 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash -813678361, now seen corresponding path program 1 times [2022-07-22 11:16:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251308161] [2022-07-22 11:16:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 11:16:52,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251308161] [2022-07-22 11:16:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251308161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:52,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:52,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535426290] [2022-07-22 11:16:52,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:52,364 INFO L87 Difference]: Start difference. First operand 2337 states and 3347 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:54,127 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 [] [2022-07-22 11:16:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:54,355 INFO L93 Difference]: Finished difference Result 4743 states and 6802 transitions. [2022-07-22 11:16:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 213 [2022-07-22 11:16:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:54,360 INFO L225 Difference]: With dead ends: 4743 [2022-07-22 11:16:54,361 INFO L226 Difference]: Without dead ends: 2429 [2022-07-22 11:16:54,363 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 [2022-07-22 11:16:54,363 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 33 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:54,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 563 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:16:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2022-07-22 11:16:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2337. [2022-07-22 11:16:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 1.4297945205479452) internal successors, (3340), 2336 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3340 transitions. [2022-07-22 11:16:54,431 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3340 transitions. Word has length 213 [2022-07-22 11:16:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:54,432 INFO L495 AbstractCegarLoop]: Abstraction has 2337 states and 3340 transitions. [2022-07-22 11:16:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3340 transitions. [2022-07-22 11:16:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 11:16:54,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:54,436 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-22 11:16:54,436 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 830654733, now seen corresponding path program 1 times [2022-07-22 11:16:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36866661] [2022-07-22 11:16:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 11:16:54,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:54,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36866661] [2022-07-22 11:16:54,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36866661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:54,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:54,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650711484] [2022-07-22 11:16:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:54,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:54,560 INFO L87 Difference]: Start difference. First operand 2337 states and 3340 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:55,042 INFO L93 Difference]: Finished difference Result 4721 states and 6765 transitions. [2022-07-22 11:16:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 214 [2022-07-22 11:16:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:55,047 INFO L225 Difference]: With dead ends: 4721 [2022-07-22 11:16:55,047 INFO L226 Difference]: Without dead ends: 2407 [2022-07-22 11:16:55,050 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 [2022-07-22 11:16:55,050 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 29 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:55,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 557 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:16:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-07-22 11:16:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2337. [2022-07-22 11:16:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 1.4267979452054795) internal successors, (3333), 2336 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3333 transitions. [2022-07-22 11:16:55,129 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3333 transitions. Word has length 214 [2022-07-22 11:16:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:55,129 INFO L495 AbstractCegarLoop]: Abstraction has 2337 states and 3333 transitions. [2022-07-22 11:16:55,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3333 transitions. [2022-07-22 11:16:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 11:16:55,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:55,134 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-22 11:16:55,134 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1666486752, now seen corresponding path program 1 times [2022-07-22 11:16:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:55,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218680911] [2022-07-22 11:16:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-22 11:16:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:55,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218680911] [2022-07-22 11:16:55,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218680911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:55,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:55,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852295802] [2022-07-22 11:16:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:55,289 INFO L87 Difference]: Start difference. First operand 2337 states and 3333 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:56,048 INFO L93 Difference]: Finished difference Result 5079 states and 7209 transitions. [2022-07-22 11:16:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 221 [2022-07-22 11:16:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:56,053 INFO L225 Difference]: With dead ends: 5079 [2022-07-22 11:16:56,053 INFO L226 Difference]: Without dead ends: 2765 [2022-07-22 11:16:56,056 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 [2022-07-22 11:16:56,056 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 121 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:56,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 354 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:16:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2022-07-22 11:16:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2337. [2022-07-22 11:16:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 1.417808219178082) internal successors, (3312), 2336 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3312 transitions. [2022-07-22 11:16:56,132 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3312 transitions. Word has length 221 [2022-07-22 11:16:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:56,133 INFO L495 AbstractCegarLoop]: Abstraction has 2337 states and 3312 transitions. [2022-07-22 11:16:56,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3312 transitions. [2022-07-22 11:16:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-22 11:16:56,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:56,137 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-22 11:16:56,138 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1291672886, now seen corresponding path program 1 times [2022-07-22 11:16:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:56,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256141366] [2022-07-22 11:16:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:56,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-22 11:16:56,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:56,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256141366] [2022-07-22 11:16:56,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256141366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:56,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:56,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:56,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886282017] [2022-07-22 11:16:56,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:56,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:56,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:56,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:56,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:56,280 INFO L87 Difference]: Start difference. First operand 2337 states and 3312 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:56,842 INFO L93 Difference]: Finished difference Result 5352 states and 7587 transitions. [2022-07-22 11:16:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-07-22 11:16:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:56,849 INFO L225 Difference]: With dead ends: 5352 [2022-07-22 11:16:56,849 INFO L226 Difference]: Without dead ends: 3038 [2022-07-22 11:16:56,852 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 [2022-07-22 11:16:56,852 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 110 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:56,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 366 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:16:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2022-07-22 11:16:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2561. [2022-07-22 11:16:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 1.4140625) internal successors, (3620), 2560 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3620 transitions. [2022-07-22 11:16:56,953 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3620 transitions. Word has length 227 [2022-07-22 11:16:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:56,953 INFO L495 AbstractCegarLoop]: Abstraction has 2561 states and 3620 transitions. [2022-07-22 11:16:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3620 transitions. [2022-07-22 11:16:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-22 11:16:56,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:56,958 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 11:16:56,958 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 761209965, now seen corresponding path program 1 times [2022-07-22 11:16:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:56,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027497673] [2022-07-22 11:16:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:16:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:57,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027497673] [2022-07-22 11:16:57,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027497673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:57,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:57,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:57,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668277371] [2022-07-22 11:16:57,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:57,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:57,108 INFO L87 Difference]: Start difference. First operand 2561 states and 3620 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:57,990 INFO L93 Difference]: Finished difference Result 5457 states and 7704 transitions. [2022-07-22 11:16:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 233 [2022-07-22 11:16:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:57,996 INFO L225 Difference]: With dead ends: 5457 [2022-07-22 11:16:57,996 INFO L226 Difference]: Without dead ends: 2919 [2022-07-22 11:16:57,999 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 [2022-07-22 11:16:57,999 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 64 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:58,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 612 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:16:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-07-22 11:16:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2706. [2022-07-22 11:16:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2705 states have (on average 1.4103512014787432) internal successors, (3815), 2705 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 3815 transitions. [2022-07-22 11:16:58,096 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 3815 transitions. Word has length 233 [2022-07-22 11:16:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:58,098 INFO L495 AbstractCegarLoop]: Abstraction has 2706 states and 3815 transitions. [2022-07-22 11:16:58,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 3815 transitions. [2022-07-22 11:16:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-22 11:16:58,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:58,103 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-22 11:16:58,103 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -133279257, now seen corresponding path program 1 times [2022-07-22 11:16:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:58,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306552023] [2022-07-22 11:16:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 160 proven. 4 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-07-22 11:16:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306552023] [2022-07-22 11:16:58,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306552023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:16:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652390527] [2022-07-22 11:16:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:58,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:16:58,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:16:58,272 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) [2022-07-22 11:16:58,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:16:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:16:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:16:59,176 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:16:59,177 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:16:59,223 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:16:59,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:16:59,250 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:16:59,251 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:16:59,326 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 [2022-07-22 11:16:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 153 proven. 80 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-07-22 11:16:59,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:16:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-22 11:16:59,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652390527] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:16:59,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:16:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-22 11:16:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025467536] [2022-07-22 11:16:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:59,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:59,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:16:59,425 INFO L87 Difference]: Start difference. First operand 2706 states and 3815 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:01,432 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 [] [2022-07-22 11:17:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:01,798 INFO L93 Difference]: Finished difference Result 5650 states and 7948 transitions. [2022-07-22 11:17:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 237 [2022-07-22 11:17:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:01,805 INFO L225 Difference]: With dead ends: 5650 [2022-07-22 11:17:01,805 INFO L226 Difference]: Without dead ends: 2967 [2022-07-22 11:17:01,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:01,809 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 54 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:01,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 506 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-07-22 11:17:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2756. [2022-07-22 11:17:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 1.4174228675136116) internal successors, (3905), 2755 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3905 transitions. [2022-07-22 11:17:01,885 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3905 transitions. Word has length 237 [2022-07-22 11:17:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:01,885 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 3905 transitions. [2022-07-22 11:17:01,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3905 transitions. [2022-07-22 11:17:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-22 11:17:01,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:01,890 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:17:01,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:17:02,115 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,SelfDestructingSolverStorable43 [2022-07-22 11:17:02,116 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 156273154, now seen corresponding path program 1 times [2022-07-22 11:17:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110962918] [2022-07-22 11:17:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 162 proven. 3 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 11:17:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110962918] [2022-07-22 11:17:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110962918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62376649] [2022-07-22 11:17:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:02,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:02,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:02,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:17:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:17:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:03,162 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:03,163 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:03,196 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:03,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:03,217 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:03,218 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:03,280 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 [2022-07-22 11:17:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 156 proven. 80 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-07-22 11:17:03,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-22 11:17:03,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62376649] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:03,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-22 11:17:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967004231] [2022-07-22 11:17:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:17:03,369 INFO L87 Difference]: Start difference. First operand 2756 states and 3905 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 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) [2022-07-22 11:17:04,870 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 [] [2022-07-22 11:17:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:05,197 INFO L93 Difference]: Finished difference Result 5678 states and 8006 transitions. [2022-07-22 11:17:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 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 238 [2022-07-22 11:17:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:05,201 INFO L225 Difference]: With dead ends: 5678 [2022-07-22 11:17:05,201 INFO L226 Difference]: Without dead ends: 2945 [2022-07-22 11:17:05,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:05,204 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 47 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:05,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 500 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 11:17:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2022-07-22 11:17:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2761. [2022-07-22 11:17:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 1.4166666666666667) internal successors, (3910), 2760 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3910 transitions. [2022-07-22 11:17:05,277 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3910 transitions. Word has length 238 [2022-07-22 11:17:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:05,277 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3910 transitions. [2022-07-22 11:17:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 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) [2022-07-22 11:17:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3910 transitions. [2022-07-22 11:17:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-22 11:17:05,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:05,282 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:05,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:17:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-22 11:17:05,507 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1574377718, now seen corresponding path program 1 times [2022-07-22 11:17:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905381567] [2022-07-22 11:17:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-07-22 11:17:05,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905381567] [2022-07-22 11:17:05,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905381567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:05,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:05,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249459008] [2022-07-22 11:17:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:05,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:05,689 INFO L87 Difference]: Start difference. First operand 2761 states and 3910 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:06,934 INFO L93 Difference]: Finished difference Result 5751 states and 8124 transitions. [2022-07-22 11:17:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 255 [2022-07-22 11:17:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:06,939 INFO L225 Difference]: With dead ends: 5751 [2022-07-22 11:17:06,939 INFO L226 Difference]: Without dead ends: 3013 [2022-07-22 11:17:06,942 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 [2022-07-22 11:17:06,943 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 22 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:06,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 563 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:17:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2022-07-22 11:17:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2943. [2022-07-22 11:17:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.4099252209381372) internal successors, (4148), 2942 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4148 transitions. [2022-07-22 11:17:07,018 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4148 transitions. Word has length 255 [2022-07-22 11:17:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:07,019 INFO L495 AbstractCegarLoop]: Abstraction has 2943 states and 4148 transitions. [2022-07-22 11:17:07,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4148 transitions. [2022-07-22 11:17:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-22 11:17:07,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:07,024 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-22 11:17:07,024 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2122005531, now seen corresponding path program 1 times [2022-07-22 11:17:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866861954] [2022-07-22 11:17:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:17:07,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866861954] [2022-07-22 11:17:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866861954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:07,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:07,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332177332] [2022-07-22 11:17:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:07,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:07,177 INFO L87 Difference]: Start difference. First operand 2943 states and 4148 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:09,183 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 [] [2022-07-22 11:17:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:09,470 INFO L93 Difference]: Finished difference Result 5999 states and 8428 transitions. [2022-07-22 11:17:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 260 [2022-07-22 11:17:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:09,474 INFO L225 Difference]: With dead ends: 5999 [2022-07-22 11:17:09,474 INFO L226 Difference]: Without dead ends: 3079 [2022-07-22 11:17:09,477 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 [2022-07-22 11:17:09,477 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 59 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:09,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 602 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-07-22 11:17:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2943. [2022-07-22 11:17:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.4082256968048947) internal successors, (4143), 2942 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4143 transitions. [2022-07-22 11:17:09,553 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4143 transitions. Word has length 260 [2022-07-22 11:17:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:09,553 INFO L495 AbstractCegarLoop]: Abstraction has 2943 states and 4143 transitions. [2022-07-22 11:17:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4143 transitions. [2022-07-22 11:17:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-22 11:17:09,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:09,558 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:09,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-22 11:17:09,559 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash 441756832, now seen corresponding path program 1 times [2022-07-22 11:17:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431118076] [2022-07-22 11:17:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 169 proven. 7 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-07-22 11:17:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431118076] [2022-07-22 11:17:09,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431118076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754653858] [2022-07-22 11:17:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:09,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:09,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:09,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:09,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:17:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:17:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:10,676 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:10,676 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:10,707 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:10,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:10,719 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 20 treesize of output 8 [2022-07-22 11:17:10,726 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 36 treesize of output 24 [2022-07-22 11:17:10,750 INFO L356 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2022-07-22 11:17:10,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 88 [2022-07-22 11:17:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:10,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-07-22 11:17:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:10,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-22 11:17:10,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:10,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 11:17:10,862 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-22 11:17:10,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 34 [2022-07-22 11:17:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:10,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 11:17:10,912 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 [2022-07-22 11:17:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 164 proven. 119 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 11:17:10,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-22 11:17:10,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754653858] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:10,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:10,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2022-07-22 11:17:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500116095] [2022-07-22 11:17:10,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:17:10,967 INFO L87 Difference]: Start difference. First operand 2943 states and 4143 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:12,727 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 [] [2022-07-22 11:17:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:13,153 INFO L93 Difference]: Finished difference Result 6291 states and 8829 transitions. [2022-07-22 11:17:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-07-22 11:17:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:13,158 INFO L225 Difference]: With dead ends: 6291 [2022-07-22 11:17:13,158 INFO L226 Difference]: Without dead ends: 3371 [2022-07-22 11:17:13,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:17:13,162 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 114 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:13,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 354 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:17:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2022-07-22 11:17:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2943. [2022-07-22 11:17:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.403467029231815) internal successors, (4129), 2942 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4129 transitions. [2022-07-22 11:17:13,245 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4129 transitions. Word has length 260 [2022-07-22 11:17:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 2943 states and 4129 transitions. [2022-07-22 11:17:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4129 transitions. [2022-07-22 11:17:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-22 11:17:13,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:13,251 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:13,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:17:13,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:13,468 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash -937950267, now seen corresponding path program 1 times [2022-07-22 11:17:13,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361290362] [2022-07-22 11:17:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:17:13,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361290362] [2022-07-22 11:17:13,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361290362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:13,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:13,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:13,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270420366] [2022-07-22 11:17:13,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:13,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:13,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:13,667 INFO L87 Difference]: Start difference. First operand 2943 states and 4129 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:15,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:15,559 INFO L93 Difference]: Finished difference Result 6291 states and 8801 transitions. [2022-07-22 11:17:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 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 261 [2022-07-22 11:17:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:15,563 INFO L225 Difference]: With dead ends: 6291 [2022-07-22 11:17:15,563 INFO L226 Difference]: Without dead ends: 3371 [2022-07-22 11:17:15,566 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 [2022-07-22 11:17:15,566 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 114 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:15,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 354 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 11:17:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2022-07-22 11:17:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2943. [2022-07-22 11:17:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.3922501699524132) internal successors, (4096), 2942 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4096 transitions. [2022-07-22 11:17:15,628 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4096 transitions. Word has length 261 [2022-07-22 11:17:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:15,628 INFO L495 AbstractCegarLoop]: Abstraction has 2943 states and 4096 transitions. [2022-07-22 11:17:15,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4096 transitions. [2022-07-22 11:17:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-22 11:17:15,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:15,632 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-22 11:17:15,633 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -504667862, now seen corresponding path program 1 times [2022-07-22 11:17:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962514167] [2022-07-22 11:17:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-22 11:17:15,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962514167] [2022-07-22 11:17:15,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962514167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219025857] [2022-07-22 11:17:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:15,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:15,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:15,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:17:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 11:17:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:16,795 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:16,795 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:16,826 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:16,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:16,837 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 36 treesize of output 24 [2022-07-22 11:17:16,863 INFO L356 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2022-07-22 11:17:16,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 88 [2022-07-22 11:17:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:16,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-07-22 11:17:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:16,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-22 11:17:16,934 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-07-22 11:17:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:16,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 11:17:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 177 proven. 96 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-22 11:17:17,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-22 11:17:17,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219025857] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:17,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:17,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2022-07-22 11:17:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361102861] [2022-07-22 11:17:17,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:17,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:17:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:17:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:17,086 INFO L87 Difference]: Start difference. First operand 2943 states and 4096 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 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) [2022-07-22 11:17:18,676 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 [] [2022-07-22 11:17:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:19,495 INFO L93 Difference]: Finished difference Result 6783 states and 9432 transitions. [2022-07-22 11:17:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 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 264 [2022-07-22 11:17:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:19,500 INFO L225 Difference]: With dead ends: 6783 [2022-07-22 11:17:19,500 INFO L226 Difference]: Without dead ends: 3863 [2022-07-22 11:17:19,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:17:19,503 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 134 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:19,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 457 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2022-07-22 11:17:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 3414. [2022-07-22 11:17:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 1.3940814532669206) internal successors, (4758), 3413 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 4758 transitions. [2022-07-22 11:17:19,602 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 4758 transitions. Word has length 264 [2022-07-22 11:17:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:19,602 INFO L495 AbstractCegarLoop]: Abstraction has 3414 states and 4758 transitions. [2022-07-22 11:17:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 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) [2022-07-22 11:17:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 4758 transitions. [2022-07-22 11:17:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-07-22 11:17:19,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:19,606 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:17:19,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 11:17:19,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 11:17:19,807 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1528128287, now seen corresponding path program 1 times [2022-07-22 11:17:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189531886] [2022-07-22 11:17:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 325 proven. 16 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-22 11:17:19,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189531886] [2022-07-22 11:17:19,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189531886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:19,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068038484] [2022-07-22 11:17:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:19,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:19,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:19,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:19,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:17:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:20,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 11:17:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:20,984 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:20,985 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:21,016 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:21,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:21,024 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 36 treesize of output 24 [2022-07-22 11:17:21,048 INFO L356 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2022-07-22 11:17:21,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 88 [2022-07-22 11:17:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:21,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-07-22 11:17:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:21,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-22 11:17:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:21,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 11:17:21,127 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-22 11:17:21,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 34 [2022-07-22 11:17:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:21,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-22 11:17:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 180 proven. 96 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-22 11:17:21,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-22 11:17:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068038484] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2022-07-22 11:17:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616502792] [2022-07-22 11:17:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:17:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:17:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:21,268 INFO L87 Difference]: Start difference. First operand 3414 states and 4758 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:22,043 INFO L93 Difference]: Finished difference Result 7233 states and 10059 transitions. [2022-07-22 11:17:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 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 265 [2022-07-22 11:17:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:22,048 INFO L225 Difference]: With dead ends: 7233 [2022-07-22 11:17:22,048 INFO L226 Difference]: Without dead ends: 3842 [2022-07-22 11:17:22,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:17:22,052 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 235 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:22,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 353 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:17:22,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2022-07-22 11:17:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 3344. [2022-07-22 11:17:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.3882740053843854) internal successors, (4641), 3343 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4641 transitions. [2022-07-22 11:17:22,130 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4641 transitions. Word has length 265 [2022-07-22 11:17:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:22,131 INFO L495 AbstractCegarLoop]: Abstraction has 3344 states and 4641 transitions. [2022-07-22 11:17:22,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4641 transitions. [2022-07-22 11:17:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-22 11:17:22,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:22,136 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:22,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:17:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:22,336 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -524727557, now seen corresponding path program 1 times [2022-07-22 11:17:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541195536] [2022-07-22 11:17:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 345 proven. 6 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-07-22 11:17:22,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541195536] [2022-07-22 11:17:22,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541195536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222054472] [2022-07-22 11:17:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:22,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:22,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:22,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:17:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:17:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:23,462 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:23,463 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:23,488 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:23,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:23,504 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:23,505 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:23,611 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 [2022-07-22 11:17:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 336 proven. 80 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-07-22 11:17:23,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-22 11:17:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222054472] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:23,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:23,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-22 11:17:23,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949629862] [2022-07-22 11:17:23,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:17:23,682 INFO L87 Difference]: Start difference. First operand 3344 states and 4641 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:24,310 INFO L93 Difference]: Finished difference Result 7004 states and 9714 transitions. [2022-07-22 11:17:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 271 [2022-07-22 11:17:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:24,315 INFO L225 Difference]: With dead ends: 7004 [2022-07-22 11:17:24,315 INFO L226 Difference]: Without dead ends: 3683 [2022-07-22 11:17:24,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:24,319 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 54 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:24,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 494 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:17:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2022-07-22 11:17:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3429. [2022-07-22 11:17:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 1.3920653442240374) internal successors, (4772), 3428 states have internal predecessors, (4772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 4772 transitions. [2022-07-22 11:17:24,395 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 4772 transitions. Word has length 271 [2022-07-22 11:17:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:24,395 INFO L495 AbstractCegarLoop]: Abstraction has 3429 states and 4772 transitions. [2022-07-22 11:17:24,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 4772 transitions. [2022-07-22 11:17:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-22 11:17:24,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:24,400 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:24,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 11:17:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:24,602 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1868048138, now seen corresponding path program 1 times [2022-07-22 11:17:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132074495] [2022-07-22 11:17:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 348 proven. 5 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-07-22 11:17:24,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132074495] [2022-07-22 11:17:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132074495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126233976] [2022-07-22 11:17:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:24,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:24,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:17:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:25,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:17:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:25,855 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:25,856 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:25,881 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:17:25,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:17:25,909 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:17:25,909 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:17:25,954 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 [2022-07-22 11:17:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 340 proven. 80 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-07-22 11:17:25,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:17:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-22 11:17:26,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126233976] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:26,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:17:26,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-22 11:17:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4677992] [2022-07-22 11:17:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:26,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:17:26,020 INFO L87 Difference]: Start difference. First operand 3429 states and 4772 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:26,815 INFO L93 Difference]: Finished difference Result 7075 states and 9812 transitions. [2022-07-22 11:17:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 272 [2022-07-22 11:17:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:26,820 INFO L225 Difference]: With dead ends: 7075 [2022-07-22 11:17:26,820 INFO L226 Difference]: Without dead ends: 3669 [2022-07-22 11:17:26,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:17:26,822 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 51 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:26,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 512 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:17:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-07-22 11:17:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3440. [2022-07-22 11:17:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.3884850247164873) internal successors, (4775), 3439 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4775 transitions. [2022-07-22 11:17:26,904 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4775 transitions. Word has length 272 [2022-07-22 11:17:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:26,904 INFO L495 AbstractCegarLoop]: Abstraction has 3440 states and 4775 transitions. [2022-07-22 11:17:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4775 transitions. [2022-07-22 11:17:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-22 11:17:26,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:26,910 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-07-22 11:17:26,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:17:27,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:27,124 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash 758340726, now seen corresponding path program 1 times [2022-07-22 11:17:27,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:27,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404742296] [2022-07-22 11:17:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:27,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2022-07-22 11:17:27,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404742296] [2022-07-22 11:17:27,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404742296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:27,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:27,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:17:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979865867] [2022-07-22 11:17:27,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:27,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:17:27,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:17:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:27,573 INFO L87 Difference]: Start difference. First operand 3440 states and 4775 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2022-07-22 11:17:29,198 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 [] [2022-07-22 11:17:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:30,190 INFO L93 Difference]: Finished difference Result 6877 states and 9546 transitions. [2022-07-22 11:17:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:17:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 280 [2022-07-22 11:17:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:30,194 INFO L225 Difference]: With dead ends: 6877 [2022-07-22 11:17:30,194 INFO L226 Difference]: Without dead ends: 3440 [2022-07-22 11:17:30,196 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 [2022-07-22 11:17:30,197 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:30,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 11:17:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2022-07-22 11:17:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3440. [2022-07-22 11:17:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.3881942425123583) internal successors, (4774), 3439 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4774 transitions. [2022-07-22 11:17:30,268 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4774 transitions. Word has length 280 [2022-07-22 11:17:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:30,268 INFO L495 AbstractCegarLoop]: Abstraction has 3440 states and 4774 transitions. [2022-07-22 11:17:30,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2022-07-22 11:17:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4774 transitions. [2022-07-22 11:17:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-22 11:17:30,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:30,272 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-07-22 11:17:30,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-22 11:17:30,272 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1340403276, now seen corresponding path program 1 times [2022-07-22 11:17:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964140265] [2022-07-22 11:17:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 55 proven. 612 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:17:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964140265] [2022-07-22 11:17:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964140265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:17:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53724432] [2022-07-22 11:17:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:17:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:17:32,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:17:32,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:17:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 207 conjunts are in the unsatisfiable core [2022-07-22 11:17:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:17:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:33,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:34,016 INFO L356 Elim1Store]: treesize reduction 1040, result has 8.0 percent of original size [2022-07-22 11:17:34,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 83919837 treesize of output 12009578 [2022-07-22 11:17:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:17:42,033 INFO L244 Elim1Store]: Index analysis took 372 ms [2022-07-22 11:18:30,877 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-22 11:18:30,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 11:18:31,078 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: line 293183 column 7: canceled at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) 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:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:187) 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:298) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:284) 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: line 293183 column 7: canceled at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.push(UndoableWrapperScript.java:54) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.pushContext(SimplifyDDA.java:736) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$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:190) ... 54 more [2022-07-22 11:18:31,082 INFO L158 Benchmark]: Toolchain (without parser) took 149139.51ms. Allocated memory was 125.8MB in the beginning and 10.6GB in the end (delta: 10.5GB). Free memory was 89.4MB in the beginning and 7.3GB in the end (delta: -7.2GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 86.0MB. Free memory was 45.6MB in the beginning and 45.6MB in the end (delta: 48.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: CACSL2BoogieTranslator took 620.05ms. Allocated memory is still 125.8MB. Free memory was 89.4MB in the beginning and 79.6MB in the end (delta: 9.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: Boogie Procedure Inliner took 104.60ms. Allocated memory is still 125.8MB. Free memory was 79.6MB in the beginning and 74.6MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: Boogie Preprocessor took 95.33ms. Allocated memory is still 125.8MB. Free memory was 74.6MB in the beginning and 67.4MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: RCFGBuilder took 1387.68ms. Allocated memory was 125.8MB in the beginning and 159.4MB in the end (delta: 33.6MB). Free memory was 67.4MB in the beginning and 122.9MB in the end (delta: -55.4MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. [2022-07-22 11:18:31,082 INFO L158 Benchmark]: TraceAbstraction took 146925.42ms. Allocated memory was 159.4MB in the beginning and 10.6GB in the end (delta: 10.5GB). Free memory was 122.9MB in the beginning and 7.3GB in the end (delta: -7.2GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-07-22 11:18:31,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 86.0MB. Free memory was 45.6MB in the beginning and 45.6MB in the end (delta: 48.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 620.05ms. Allocated memory is still 125.8MB. Free memory was 89.4MB in the beginning and 79.6MB in the end (delta: 9.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 104.60ms. Allocated memory is still 125.8MB. Free memory was 79.6MB in the beginning and 74.6MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 95.33ms. Allocated memory is still 125.8MB. Free memory was 74.6MB in the beginning and 67.4MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1387.68ms. Allocated memory was 125.8MB in the beginning and 159.4MB in the end (delta: 33.6MB). Free memory was 67.4MB in the beginning and 122.9MB in the end (delta: -55.4MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. * TraceAbstraction took 146925.42ms. Allocated memory was 159.4MB in the beginning and 10.6GB in the end (delta: 10.5GB). Free memory was 122.9MB in the beginning and 7.3GB in the end (delta: -7.2GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 293183 column 7: canceled de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 293183 column 7: canceled: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:192) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-22 11:18:31,293 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-07-22 11:18:31,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 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.07.i.cil-1.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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:18:33,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:18:33,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:18:33,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:18:33,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:18:33,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:18:33,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:18:33,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:18:33,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:18:33,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:18:33,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:18:33,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:18:33,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:18:33,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:18:33,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:18:33,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:18:33,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:18:33,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:18:33,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:18:33,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:18:33,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:18:33,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:18:33,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:18:33,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:18:33,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:18:33,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:18:33,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:18:33,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:18:33,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:18:33,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:18:33,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:18:33,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:18:33,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:18:33,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:18:33,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:18:33,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:18:33,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:18:33,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:18:33,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:18:33,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:18:33,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:18:33,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:18:33,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 11:18:33,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:18:33,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:18:33,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:18:33,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:18:33,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:18:33,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:18:33,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:18:33,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:18:33,345 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:18:33,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:18:33,346 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:18:33,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:18:33,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 11:18:33,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 11:18:33,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:18:33,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:18:33,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:18:33,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:18:33,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:18:33,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:18:33,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:18:33,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:18:33,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:18:33,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:18:33,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:18:33,350 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 11:18:33,350 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 11:18:33,350 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:18:33,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:18:33,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:18:33,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 11:18:33,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2022-07-22 11:18:33,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:18:33,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:18:33,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:18:33,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:18:33,697 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:18:33,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:18:33,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb737e88/a96b5b808da64dff8a55a4319e9572e9/FLAG7de56af9c [2022-07-22 11:18:34,322 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:18:34,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:18:34,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb737e88/a96b5b808da64dff8a55a4319e9572e9/FLAG7de56af9c [2022-07-22 11:18:34,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb737e88/a96b5b808da64dff8a55a4319e9572e9 [2022-07-22 11:18:34,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:18:34,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:18:34,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:18:34,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:18:34,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:18:34,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:18:34" (1/1) ... [2022-07-22 11:18:34,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78101f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:34, skipping insertion in model container [2022-07-22 11:18:34,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:18:34" (1/1) ... [2022-07-22 11:18:34,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:18:34,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:18:35,159 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.07.i.cil-1.c[74369,74382] [2022-07-22 11:18:35,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:18:35,186 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-22 11:18:35,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:18:35,266 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.07.i.cil-1.c[74369,74382] [2022-07-22 11:18:35,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:18:35,274 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:18:35,380 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.07.i.cil-1.c[74369,74382] [2022-07-22 11:18:35,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:18:35,413 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:18:35,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35 WrapperNode [2022-07-22 11:18:35,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:18:35,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:18:35,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:18:35,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:18:35,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,516 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 762 [2022-07-22 11:18:35,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:18:35,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:18:35,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:18:35,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:18:35,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:18:35,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:18:35,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:18:35,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:18:35,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (1/1) ... [2022-07-22 11:18:35,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:18:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:18:35,664 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) [2022-07-22 11:18:35,675 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 [2022-07-22 11:18:35,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:18:35,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 11:18:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:18:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-22 11:18:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:18:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:18:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:18:35,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:18:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-22 11:18:35,865 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:18:35,866 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:18:35,881 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:18:42,888 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-22 11:18:42,888 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-22 11:18:42,889 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:18:42,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:18:42,899 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:18:42,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:18:42 BoogieIcfgContainer [2022-07-22 11:18:42,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:18:42,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:18:42,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:18:42,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:18:42,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:18:34" (1/3) ... [2022-07-22 11:18:42,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218785af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:18:42, skipping insertion in model container [2022-07-22 11:18:42,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:18:35" (2/3) ... [2022-07-22 11:18:42,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218785af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:18:42, skipping insertion in model container [2022-07-22 11:18:42,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:18:42" (3/3) ... [2022-07-22 11:18:42,911 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2022-07-22 11:18:42,923 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:18:42,923 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:18:42,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:18:42,972 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@3d74aef7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@220e2590 [2022-07-22 11:18:42,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:18:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 11:18:42,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:42,984 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] [2022-07-22 11:18:42,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2022-07-22 11:18:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952710065] [2022-07-22 11:18:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:43,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:43,007 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) [2022-07-22 11:18:43,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 11:18:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:18:43,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:43,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952710065] [2022-07-22 11:18:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952710065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:43,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544446941] [2022-07-22 11:18:43,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:43,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:43,730 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:43,873 INFO L93 Difference]: Finished difference Result 427 states and 728 transitions. [2022-07-22 11:18:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 11:18:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:43,890 INFO L225 Difference]: With dead ends: 427 [2022-07-22 11:18:43,890 INFO L226 Difference]: Without dead ends: 261 [2022-07-22 11:18:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:43,897 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 201 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:43,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 461 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:18:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-22 11:18:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-07-22 11:18:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5153846153846153) internal successors, (394), 260 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 394 transitions. [2022-07-22 11:18:43,971 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 394 transitions. Word has length 37 [2022-07-22 11:18:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:43,972 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 394 transitions. [2022-07-22 11:18:43,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 394 transitions. [2022-07-22 11:18:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:18:43,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:43,977 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] [2022-07-22 11:18:43,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:44,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:44,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 242366870, now seen corresponding path program 1 times [2022-07-22 11:18:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165910708] [2022-07-22 11:18:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:44,182 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) [2022-07-22 11:18:44,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 11:18:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:18:44,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:44,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:44,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165910708] [2022-07-22 11:18:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165910708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:44,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:44,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:44,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468467828] [2022-07-22 11:18:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:44,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:44,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:44,793 INFO L87 Difference]: Start difference. First operand 261 states and 394 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:45,312 INFO L93 Difference]: Finished difference Result 510 states and 781 transitions. [2022-07-22 11:18:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-22 11:18:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:45,315 INFO L225 Difference]: With dead ends: 510 [2022-07-22 11:18:45,315 INFO L226 Difference]: Without dead ends: 383 [2022-07-22 11:18:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:45,317 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:45,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:18:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-22 11:18:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-07-22 11:18:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.5052356020942408) internal successors, (575), 382 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 575 transitions. [2022-07-22 11:18:45,332 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 575 transitions. Word has length 54 [2022-07-22 11:18:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:45,333 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 575 transitions. [2022-07-22 11:18:45,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 575 transitions. [2022-07-22 11:18:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 11:18:45,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:45,336 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] [2022-07-22 11:18:45,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-22 11:18:45,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:45,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1040793707, now seen corresponding path program 1 times [2022-07-22 11:18:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374902298] [2022-07-22 11:18:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:45,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:45,559 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) [2022-07-22 11:18:45,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 11:18:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:46,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:18:46,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:46,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:46,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374902298] [2022-07-22 11:18:46,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374902298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:46,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:46,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533718641] [2022-07-22 11:18:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:46,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:46,192 INFO L87 Difference]: Start difference. First operand 383 states and 575 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:46,492 INFO L93 Difference]: Finished difference Result 752 states and 1140 transitions. [2022-07-22 11:18:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-22 11:18:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:46,495 INFO L225 Difference]: With dead ends: 752 [2022-07-22 11:18:46,495 INFO L226 Difference]: Without dead ends: 503 [2022-07-22 11:18:46,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:46,497 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:46,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 569 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:18:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-22 11:18:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-07-22 11:18:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.50398406374502) internal successors, (755), 502 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 755 transitions. [2022-07-22 11:18:46,510 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 755 transitions. Word has length 76 [2022-07-22 11:18:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:46,511 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 755 transitions. [2022-07-22 11:18:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 755 transitions. [2022-07-22 11:18:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 11:18:46,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:46,514 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 11:18:46,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:46,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:46,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -792001576, now seen corresponding path program 1 times [2022-07-22 11:18:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:46,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030152212] [2022-07-22 11:18:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:46,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:46,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:46,731 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) [2022-07-22 11:18:46,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 11:18:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:18:47,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:47,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030152212] [2022-07-22 11:18:47,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030152212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:47,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:47,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742797371] [2022-07-22 11:18:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:47,411 INFO L87 Difference]: Start difference. First operand 503 states and 755 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2022-07-22 11:18:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:48,085 INFO L93 Difference]: Finished difference Result 996 states and 1506 transitions. [2022-07-22 11:18:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 100 [2022-07-22 11:18:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:48,088 INFO L225 Difference]: With dead ends: 996 [2022-07-22 11:18:48,088 INFO L226 Difference]: Without dead ends: 627 [2022-07-22 11:18:48,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:48,090 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:48,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 572 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:18:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-22 11:18:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-07-22 11:18:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.5) internal successors, (939), 626 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 939 transitions. [2022-07-22 11:18:48,104 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 939 transitions. Word has length 100 [2022-07-22 11:18:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:48,105 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 939 transitions. [2022-07-22 11:18:48,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2022-07-22 11:18:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 939 transitions. [2022-07-22 11:18:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-22 11:18:48,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:48,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:48,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:48,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:48,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash 528158642, now seen corresponding path program 1 times [2022-07-22 11:18:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:48,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712771339] [2022-07-22 11:18:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:48,319 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) [2022-07-22 11:18:48,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 11:18:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:18:48,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:48,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:48,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712771339] [2022-07-22 11:18:48,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712771339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:48,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:48,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916695199] [2022-07-22 11:18:48,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:48,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:48,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:48,995 INFO L87 Difference]: Start difference. First operand 627 states and 939 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2022-07-22 11:18:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:49,524 INFO L93 Difference]: Finished difference Result 1242 states and 1871 transitions. [2022-07-22 11:18:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 117 [2022-07-22 11:18:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:49,534 INFO L225 Difference]: With dead ends: 1242 [2022-07-22 11:18:49,534 INFO L226 Difference]: Without dead ends: 749 [2022-07-22 11:18:49,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:49,537 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:49,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:18:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-07-22 11:18:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-07-22 11:18:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4973262032085561) internal successors, (1120), 748 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1120 transitions. [2022-07-22 11:18:49,560 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1120 transitions. Word has length 117 [2022-07-22 11:18:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:49,560 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1120 transitions. [2022-07-22 11:18:49,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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) [2022-07-22 11:18:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1120 transitions. [2022-07-22 11:18:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 11:18:49,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:49,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:49,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:49,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:49,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash 686668759, now seen corresponding path program 1 times [2022-07-22 11:18:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864092216] [2022-07-22 11:18:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:49,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:49,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:49,782 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) [2022-07-22 11:18:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 11:18:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:50,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 11:18:50,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:50,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:50,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864092216] [2022-07-22 11:18:50,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864092216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:50,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:50,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:50,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220148639] [2022-07-22 11:18:50,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:50,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:50,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:50,501 INFO L87 Difference]: Start difference. First operand 749 states and 1120 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:50,941 INFO L93 Difference]: Finished difference Result 1487 states and 2235 transitions. [2022-07-22 11:18:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 129 [2022-07-22 11:18:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:50,945 INFO L225 Difference]: With dead ends: 1487 [2022-07-22 11:18:50,946 INFO L226 Difference]: Without dead ends: 872 [2022-07-22 11:18:50,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:50,950 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 151 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:50,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 571 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:18:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-07-22 11:18:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2022-07-22 11:18:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.4959816303099884) internal successors, (1303), 871 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1303 transitions. [2022-07-22 11:18:50,969 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1303 transitions. Word has length 129 [2022-07-22 11:18:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:50,970 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1303 transitions. [2022-07-22 11:18:50,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1303 transitions. [2022-07-22 11:18:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-22 11:18:50,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:50,982 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, 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] [2022-07-22 11:18:51,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-22 11:18:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:51,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1133322389, now seen corresponding path program 1 times [2022-07-22 11:18:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362275235] [2022-07-22 11:18:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:51,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:51,208 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) [2022-07-22 11:18:51,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 11:18:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:18:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 11:18:52,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:52,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:52,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362275235] [2022-07-22 11:18:52,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362275235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:52,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:52,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:18:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871800372] [2022-07-22 11:18:52,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:52,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:18:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:18:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:52,105 INFO L87 Difference]: Start difference. First operand 872 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2022-07-22 11:18:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:52,642 INFO L93 Difference]: Finished difference Result 1732 states and 2599 transitions. [2022-07-22 11:18:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:18:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 160 [2022-07-22 11:18:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:52,647 INFO L225 Difference]: With dead ends: 1732 [2022-07-22 11:18:52,647 INFO L226 Difference]: Without dead ends: 994 [2022-07-22 11:18:52,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:18:52,649 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:52,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 571 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:18:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-07-22 11:18:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2022-07-22 11:18:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4954682779456194) internal successors, (1485), 993 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1485 transitions. [2022-07-22 11:18:52,680 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1485 transitions. Word has length 160 [2022-07-22 11:18:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1485 transitions. [2022-07-22 11:18:52,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2022-07-22 11:18:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1485 transitions. [2022-07-22 11:18:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-22 11:18:52,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:52,683 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:52,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:52,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:18:52,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2022-07-22 11:18:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:18:52,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427055625] [2022-07-22 11:18:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:52,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:18:52,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:18:52,908 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) [2022-07-22 11:18:52,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 11:18:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 11:18:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:54,265 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 [2022-07-22 11:18:54,276 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 [2022-07-22 11:18:54,922 INFO L356 Elim1Store]: treesize reduction 1496, result has 4.7 percent of original size [2022-07-22 11:18:54,923 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 [2022-07-22 11:18:54,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,011 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 [2022-07-22 11:18:55,207 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-22 11:18:55,208 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 [2022-07-22 11:18:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:18:55,245 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 [2022-07-22 11:18:55,270 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 [2022-07-22 11:18:55,275 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 [2022-07-22 11:18:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 11:18:55,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:18:55,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:18:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427055625] [2022-07-22 11:18:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427055625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:55,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:55,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519914205] [2022-07-22 11:18:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:18:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:55,305 INFO L87 Difference]: Start difference. First operand 994 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2022-07-22 11:18:57,327 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 [] [2022-07-22 11:18:59,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:00,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:03,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:08,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:08,672 INFO L93 Difference]: Finished difference Result 1985 states and 2966 transitions. [2022-07-22 11:19:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:19:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 172 [2022-07-22 11:19:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:08,679 INFO L225 Difference]: With dead ends: 1985 [2022-07-22 11:19:08,679 INFO L226 Difference]: Without dead ends: 994 [2022-07-22 11:19:08,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:19:08,681 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:08,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 13.3s Time] [2022-07-22 11:19:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-07-22 11:19:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2022-07-22 11:19:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4944612286002015) internal successors, (1484), 993 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1484 transitions. [2022-07-22 11:19:08,704 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1484 transitions. Word has length 172 [2022-07-22 11:19:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:08,705 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1484 transitions. [2022-07-22 11:19:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2022-07-22 11:19:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1484 transitions. [2022-07-22 11:19:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-22 11:19:08,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:08,708 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:08,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:19:08,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:19:08,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2022-07-22 11:19:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:19:08,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120825274] [2022-07-22 11:19:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:19:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:19:08,928 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) [2022-07-22 11:19:08,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 11:19:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:19:10,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:19:10,540 INFO L356 Elim1Store]: treesize reduction 180, result has 14.3 percent of original size [2022-07-22 11:19:10,541 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 [2022-07-22 11:19:10,683 INFO L356 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2022-07-22 11:19:10,684 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 [2022-07-22 11:19:10,770 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-22 11:19:10,770 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 [2022-07-22 11:19:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 11:19:10,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:19:10,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:19:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120825274] [2022-07-22 11:19:10,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120825274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:10,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:10,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:10,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191881261] [2022-07-22 11:19:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:10,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:19:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:10,795 INFO L87 Difference]: Start difference. First operand 994 states and 1484 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:12,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:19,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:20,854 INFO L93 Difference]: Finished difference Result 2350 states and 3512 transitions. [2022-07-22 11:19:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:20,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 172 [2022-07-22 11:19:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:20,862 INFO L225 Difference]: With dead ends: 2350 [2022-07-22 11:19:20,862 INFO L226 Difference]: Without dead ends: 1366 [2022-07-22 11:19:20,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:20,865 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 36 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:20,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 590 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 2 Unknown, 42 Unchecked, 10.0s Time] [2022-07-22 11:19:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-07-22 11:19:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1201. [2022-07-22 11:19:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 1.5291666666666666) internal successors, (1835), 1200 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1835 transitions. [2022-07-22 11:19:20,894 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1835 transitions. Word has length 172 [2022-07-22 11:19:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:20,894 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1835 transitions. [2022-07-22 11:19:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1835 transitions. [2022-07-22 11:19:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-22 11:19:20,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:20,898 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:20,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:19:21,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:19:21,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2022-07-22 11:19:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:19:21,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013321386] [2022-07-22 11:19:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:21,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:19:21,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:19:21,114 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) [2022-07-22 11:19:21,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 11:19:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:19:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:19:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:22,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:19:22,869 INFO L356 Elim1Store]: treesize reduction 1109, result has 5.5 percent of original size [2022-07-22 11:19:22,869 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 [2022-07-22 11:19:23,352 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-22 11:19:23,352 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 [2022-07-22 11:19:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 11:19:23,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:19:23,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:19:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013321386] [2022-07-22 11:19:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013321386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:23,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:23,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119382372] [2022-07-22 11:19:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:19:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:23,375 INFO L87 Difference]: Start difference. First operand 1201 states and 1835 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:25,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:30,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:36,550 INFO L93 Difference]: Finished difference Result 2900 states and 4439 transitions. [2022-07-22 11:19:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 172 [2022-07-22 11:19:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:36,563 INFO L225 Difference]: With dead ends: 2900 [2022-07-22 11:19:36,564 INFO L226 Difference]: Without dead ends: 1709 [2022-07-22 11:19:36,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:36,566 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 56 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:36,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 617 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2022-07-22 11:19:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-07-22 11:19:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1425. [2022-07-22 11:19:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.5695224719101124) internal successors, (2235), 1424 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2235 transitions. [2022-07-22 11:19:36,607 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2235 transitions. Word has length 172 [2022-07-22 11:19:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:36,608 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2235 transitions. [2022-07-22 11:19:36,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2235 transitions. [2022-07-22 11:19:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 11:19:36,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:36,611 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:36,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:19:36,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:19:36,831 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2022-07-22 11:19:36,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:19:36,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238067542] [2022-07-22 11:19:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:36,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:19:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:19:36,835 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) [2022-07-22 11:19:36,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 11:19:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:19:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:19:39,053 INFO L356 Elim1Store]: treesize reduction 1100, result has 5.5 percent of original size [2022-07-22 11:19:39,054 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 49 treesize of output 73 [2022-07-22 11:19:39,118 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-22 11:19:39,119 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 [2022-07-22 11:19:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:19:39,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:19:39,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:19:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238067542] [2022-07-22 11:19:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238067542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:39,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133248996] [2022-07-22 11:19:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:19:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:39,161 INFO L87 Difference]: Start difference. First operand 1425 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:41,177 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 [] [2022-07-22 11:19:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:46,257 INFO L93 Difference]: Finished difference Result 2928 states and 4569 transitions. [2022-07-22 11:19:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 185 [2022-07-22 11:19:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:46,265 INFO L225 Difference]: With dead ends: 2928 [2022-07-22 11:19:46,266 INFO L226 Difference]: Without dead ends: 1513 [2022-07-22 11:19:46,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:46,269 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 22 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:46,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 565 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 1 Unknown, 23 Unchecked, 7.0s Time] [2022-07-22 11:19:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2022-07-22 11:19:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1425. [2022-07-22 11:19:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.5639044943820224) internal successors, (2227), 1424 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2227 transitions. [2022-07-22 11:19:46,322 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2227 transitions. Word has length 185 [2022-07-22 11:19:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:46,322 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2227 transitions. [2022-07-22 11:19:46,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2227 transitions. [2022-07-22 11:19:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-22 11:19:46,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:46,326 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:46,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-22 11:19:46,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:19:46,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2022-07-22 11:19:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:19:46,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693628587] [2022-07-22 11:19:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:19:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:19:46,542 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) [2022-07-22 11:19:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 11:19:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:19:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:19:48,840 INFO L356 Elim1Store]: treesize reduction 1101, result has 5.5 percent of original size [2022-07-22 11:19:48,840 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 [2022-07-22 11:19:48,889 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-22 11:19:48,889 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 [2022-07-22 11:19:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:19:48,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:19:48,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:19:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693628587] [2022-07-22 11:19:48,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693628587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:48,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:48,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323445376] [2022-07-22 11:19:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:19:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:48,914 INFO L87 Difference]: Start difference. First operand 1425 states and 2227 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:50,935 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 []